2018 US GAAP Taxonomy

With notes on deprecated elements

Label Documentation Deprecated Label Deprecated Date
Accounting Address [Member] Address for entity's accounting support or firm    
Accounting Contact [Member] Accounting contact for the entity    
Accounting Fax [Member] Accounting fax number    
Accounting Phone [Member] Accounting phone number    
Entity Address, Address Description Description of the kind of address for the entity, if needed to distinguish more finely among mailing, principal, legal, accounting, contact or other addresses.    
Entity Address, Address Line One Address Line 1 such as Building Name, Street Name    
Entity Address, Address Line Two Address Line 2 such as Suite No.    
Entity Address, Address Line Three Address Line 3    
Entity Addresses, Address Type [Axis] The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table.    
Address Type [Domain] An entity may have several addresses for different purposes and this domain represents all such types.    
Amendment Description Description of changes contained within amended document.    
Amendment Flag If the value is true, then the document is an amendment to previously-filed/accepted document.    
Business Contact [Member] Business contact for the entity    
City Area Code Area code of city    
Entity Address, City or Town Name of the City or Town    
Contact Address [Member] Contact address for entity    
Contact Fax [Member] Contact fax number    
Entity Contact Personnel, Contact Person Type [Axis] The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table.    
Contact Personnel Email Address Email address of contact personnel.    
Contact Personnel Name Name of contact personnel    
Contact Personnel Uniform Resource Locator (URL) URL for contact personnel.    
Contact Phone [Member] Contact phone number    
Contained File Information, File Description The description of the contained file.    
Contained File Information, File Name The name of the contained file.    
Contained File Information, File Type The type or format of the contained file (usually XBRL but may be used for other types such as HTML, Word, PDF, GIF/JPG, etc.).    
Entity Address, Country Name of the Country    
Country Region Region code of country    
Current Fiscal Year End Date End date of current fiscal year in the format --MM-DD.    
Document Contact [Member] Specific document contact for the entity    
Document Creation Date The date the document was made available and submitted, in CCYY-MM-DD format. The date of submission, date of acceptance by the recipient, and the document effective date are all potentially different.    
Document Description The description of the document.    
Document Effective Date The date when a document, upon receipt and acceptance, becomes officially effective, in CCYY-MM-DD format. Usually it is a system-assigned date time value, but it may be declared by the submitter in some cases.    
Document Information, Document [Axis] The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table.    
Document [Domain] Type of the document as assigned by the filer, corresponding to SEC document naming convention standards.    
Document Information [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Document Information [Table] Container to support the formal attachment of each official or unofficial, public or private document as part of a submission package.    
Document Information [Text Block] Container to support the formal attachment of each official or unofficial, public or private document as part of a submission package.    
Document Name Name of the document as assigned by the filer, corresponding to SEC document naming convention standards. Examples appear in the <FILENAME> field of EDGAR filings, such as 'htm_25911.htm', 'exhibit1.htm', 'v105727_8k.txt'.    
Document Period End Date The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented.  If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.    
Document Period Start Date The start date of the period covered in the document, in CCYY-MM-DD format.    
Entities [Table] Container to assemble all relevant information about each entity associated with the document instance    
Entity [Text Block] Container to serve as parent of six Entity related Table concepts.    
Entity Addresses [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Entity Addresses [Table] Container of address information for the entity    
Contact Person Type [Domain] An entity may have any number of contact people and this domain indicates the set of types of contact persons.    
Entity Contact Personnel [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Entity Contact Personnel [Table] Container of the Contact Personnel Information    
Entity [Domain] All the names of the entities being reported upon in a document. Any legal structure used to conduct activities or to hold assets. Some examples of such structures are corporations, partnerships, limited liability companies, grantor trusts, and other trusts. This item does not include business and geographical segments which are included in the geographical or business segments domains.    
Entity Other Identification Value Value of other entity identification type    
Entity Incorporation, Date of Incorporation Date when an entity was incorporated    
Entity Incorporation, State Country Name State or Country Name where an entity is incorporated    
Entity Information, Date to Change Former Legal or Registered Name Date when Former Legal or Registered Name was changed    
Entity Information, Former Legal or Registered Name Former Legal or Registered Name of an entity    
Entity Information [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Entity Listings [Table] Container for exchange listing information for an entity    
Entity Phone Fax Numbers [Table] Container of the phone or fax numbers for the entity    
Entity Sector Industry Classifications [Table] Table associating entities with their Standard Industry Classification ('SIC').    
Extension Extension number for local phone number.    
Former Fiscal Year End Date Former end date of previous fiscal years    
General Fax [Member] General fax number for entity    
General Phone [Member] General phone number for entity    
Human Resources Contact [Member] Human resources contact for the entity    
Investor Relations Contact [Member] Investor relations contact for the entity    
Investor Relations Fax [Member] Investor relations fax number    
Investor Relations Phone [Member] Investor relations phone number    
Legal Address [Member] Address for entity's legal representation    
Legal Contact [Member] Legal contact for the entity    
Legal Fax [Member] Legal fax number    
Legal Phone [Member] Legal phone number    
Entity Listings, Exchange [Axis] The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table.    
Local Phone Number Local phone number for entity.    
Mailing Address [Member] Mailing address for entity    
Other Address [Member] Other address for entity    
Phone Fax Number Description Description of Phone or Fax Number    
Phone Fax Number Type [Domain] An entity may provide a variety of different phone and fax numbers for contacts for different purposes and this domain represents the set of all such types.    
Entity Address, Postal Zip Code Code for the postal or zip code    
Principal Address [Member] Principal address for entity    
Entity Address, Region Name of the region.    
Entity Address, State or Province Name of the state or province.    
Trading Symbol Trading symbol of an instrument as listed on an exchange.    
Entity Phone Fax Numbers [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Entity Listings [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Entity Sector Industry Classifications [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Entity Sector Industry Classifications, Sector [Axis] The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table.    
Entity Phone Fax Numbers, Phone Fax Number Type [Axis] The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table.    
Entity Sector Industry Classification, Primary Indicates the primary SIC code of the entity. This item appears in the 'Entity Sector Industry Classifications [Table]' and is qualified by a SIC code member. The value is 'Yes' for an entity in its primary SIC code.    
Entity North American Industry Classifications [Table] Table associating entities with their North American Industry Classification System (NAICS) code.    
Entity North American Industry Classifications, Industry [Axis] The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table.    
Entity North American Industry Classifications [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Entity North American Industry Classification, Primary Indicates the primary NAICS code of the entity. This item appears in the 'Entity North American Industry Classifications [Table]' and is qualified by a NAICS code member. The value is 'Yes' for an entity in its primary NAICS code.    
Contained File Information, File Number The SEC Document Number of the contained file.    
Entity Well-known Seasoned Issuer Indicate 'Yes' or 'No' if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Is used on Form Type: 10-K, 10-Q, 8-K, 20-F, 6-K, 10-K/A, 10-Q/A, 20-F/A, 6-K/A, N-CSR, N-Q, N-1A.    
Entity Voluntary Filers Indicate 'Yes' or 'No' if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    
Entity Current Reporting Status Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure.    
Entity Filer Category Indicate whether the registrant is one of the following: (1) Large Accelerated Filer, (2) Accelerated Filer, (3) Non-accelerated Filer, (4) Smaller Reporting Company (Non-accelerated) or (5) Smaller Reporting Accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure.    
Entity Public Float State aggregate market value of voting and non-voting common equity held by non-affiliates computed by reference to price at which the common equity was last sold, or average bid and asked price of such common equity, as of the last business day of registrant's most recently completed second fiscal quarter. The public float should be reported on the cover page of the registrants form 10K.    
Entity Registrant Name The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.    
Entity Central Index Key A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.    
Entity Tax Identification Number The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.    
Entity Data Universal Numbering System Number The Data Universal Numbering System (DUNS) number is a unique 9-digit identification number provided by Dun & Bradstreet (D&B)    
Entity Other Identification Type A unique identification type for the entity, other than Registrant Name, Central Index Key, Tax Identification Number, or Data Universal Numbering System Number.    
Entity Common Stock, Shares Outstanding Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.    
Entity Listing, Primary Yes or No value indicating whether a listing of an instrument on an exchange is primary for the entity.    
Entity Listing, Description Description of the kind of listing the entity has on the exchange, if necessary to further describe different instruments that are already distinguished by Entity, Exchange and Security.    
Entity Listings, Instrument [Axis] The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table.    
Instrument [Domain] The form of funding medium, used for borrowing in financial markets, through the issuance of securities such as equity and debt securities.    
Entity Legal Form The details of the entity's legal form. Examples are partnership, limited liability company, trust, etc.    
Parent Entity Legal Name If the entity which the financial information concerns is a subsidiary of another company, then provide to full legal name of the parent entity    
Entity Accounting Standard The standardized abbreviation of the accounting standard used by the entity. This can either be US GAAP as promulgated by the FASB or IFRS as promulgated by the IASB. Example: 'US GAAP', 'IFRS'.    
Entity Home Country ISO Code The two character ISO 3166 code for the Entity's home country. If home country is different from country of legal incorporation, then also provide country of legal incorporation in the 'Entity Incorporation, State Country Name' element.    
Entity Reporting Currency ISO Code The three character ISO 4217 code for the currency used for reporting purposes. Example: 'USD'.    
Entity Listing, Security Trading Currency The three character ISO 4217 code for the currency in which the security is quoted. Example: 'USD'    
Entity Listing, Par Value Per Share The par value per share of security quoted in same currency as Trading currency. Example: '0.01'.    
Entity Listing, Foreign Yes or No value indicating whether this is a listing that is a foreign listing or depository receipt.    
Entity Listing, Depository Receipt Ratio The number of underlying shares represented by one American Depository Receipt (ADR) or Global Depository Receipt (GDR). A value of '3' means that one ADR represents 3 underlying shares. If one underlying share represents 2 ADR's then the value would be represented as '0.5'.    
Document Title The name or title given to the document resource by the creator or publisher. An example is '2002 Annual Report'.    
Document Subtitle The subtitle given to the document resource by the creator or publisher. An example is 'A New Period of Growth'.    
Document Synopsis A synopsis or description of the document provided by the creator or publisher. Examples are 'This is the 2006 annual report for Company. During this period we saw revenue grow by 10% and earnings per share grow by 15% over the prior period'    
Document Fiscal Year Focus This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.    
Document Fiscal Period Focus This is focus fiscal period of the document report. For a first quarter 2006 quarterly report, which may also provide financial information from prior periods, the first fiscal quarter should be given as the fiscal period focus. Values: FY, Q1, Q2, Q3, Q4, H1, H2, M9, T1, T2, T3, M8, CY.    
Document Version The version identifier of the document.    
Document Copyright Information The copyright information for the document.    
Entity Location [Table] The Entity location table associates entities with primary and other locations. The domain members may be countries, states, provinces and groupings of these and other geographic codes.    
Entity by Location [Axis] The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table.    
Location [Domain] A domain representing all geographic locations. Depending on the axis, it may contain members that are specific geographies, or synthetic entity-specific geographical groups.    
Entity Location, Primary Indicate 'Yes' for the entity domain member and location domain member if the location is the primary for that entity, otherwise 'No'.    
Entity Location [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Sector [Domain] A set of four-digit Sector Industrial Classification (SIC) codes (http://www.sec.gov/info/edgar/siccodes.htm). Example: 0100, Agricultural Production, Crops.    
NAICS [Domain] North American Industry Classification Set (NAICS). Example: 111110, Soybean Farming.    
Exchange [Domain] The set of all exchanges. MIC exchange codes are drawn from ISO 10383.    
Legal Entity [Axis] The set of legal entities associated with a report.    
Document Type The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.    
Deprecated Items for DEI [Abstract] This is a container item for document and entity concepts that have been deprecated.    
Entity Number of Employees Number of persons employed by the Entity    
Approximate Date of Commencement of Proposed Sale to Public The approximate date of a commencement of a proposed sale of securities to the public. This element is disclosed in S-1, S-3, S-4, S-11, F-1, F-3 and F-10 filings.    
Post-Effective Amendment Number Amendment number to registration statement under the Securities Act of 1933 after the registration becomes effective.    
Pre-Effective Amendment Number Amendment number to registration statement under the Securities Act of 1933 before the registration becomes effective.    
Registration Statement Amendment Number Amendment number to registration statement under the Investment Company Act of 1940.    
UTR The presence of this abstract element in a DTS signals that the DTS is to be validated using the UTR.    
Legal Entity Identifier A globally unique ISO 17442 value to identify entities, commonly abbreviated as LEI.    
Name Change Event [Line Items] Line items represent concepts included in a table. Name change event line item concepts are used for information qualified by domain members of axes in the Name Change Event table.    
Name Change Event [Table] For a set of related facts in a sequence of name change events, use this table when the events occurred within a single reporting period.    
Name Change Event Date [Axis] For a sequence of name change event related facts, use this typed dimension to distinguish them.  The axis members are restricted to be a valid for xml schema 'date' or 'datetime' data type.    
Investments Schedule [Abstract]      
Investment [Text Block] The entire disclosure for investments, including all tables.    
Investment [Table Text Block] A table of investments, shown as a text block.    
Investment Embedded Table [Text Block] Embedded layout commands for an Investment Table, for the SEC rendering engine.    
Investment Table Legend [Text Block] Legend for a schedule of investments. A legend may include material such as a list of abbreviations or acronyms used.    
Investment [Table] This table lists the investments. The line items identify information about the investment.    
Investment Geographic Region [Axis] For an investments table in which investments are categorized by geographic region (continent, region, country, state or province) this axis contains the members of that categorization.    
Investment Geographic Region [Domain] For an investments table in which investments are categorized by geographic region (continent, region, country, state or province) this domain represents the collection of all members of the axis.    
Investment Sector [Axis] For an investments table in which investments are categorized by sector (industry, market, customer tier, etc.) this axis contains the members of that categorization.    
Investment Sector [Domain] For an investments table in which investments are categorized by sector (industry, market, customer tier, etc.) this domain represents all members of that categorization.    
Investment Issuer [Axis] For an investments table in which investments are categorized by issuer (company, investee) this axis contains the members of that categorization.    
Investment Issuer [Domain] For an investments table in which investments are categorized by issuer (company, investee) this domain represents all members of that categorization.    
Investment Contract Counterparty [Axis] For an investments table in which investment contracts are categorized by counterparty, this is the axis of all such counterparties.    
Investment Contract Counterparty [Domain] For an investments table in which investment contracts are categorized by counterparty, this domain contains members representing those counterparties.    
Investment [Axis] A categorization of investments (securities, debt instruments, other instruments).    
Investment [Domain] A categorization of investments (securities, debt instruments, other instruments).    
Investment Holding [Axis] For an investments table in which there is more than one holding of the same investment instrument, this axis contains the members of that categorization.    
Investment Holding [Domain] For an investments table in which investments are categorized by issuer (company, investee) this axis contains the members of that categorization.    
Credit Rating Source [Axis] For an investments table in which investments contain ratings from more than one credit rating organization, this axis contains the credit rating organization.    
Credit Rating Source [Domain] For an investments table in which investments contain ratings from more than one credit rating organization, this domain contains members that are the credit rating organizations.    
Investment Securities Series [Axis] A categorization of investments (securities, debt instruments, other instruments) according to the security series.    
Investment Securities Series [Domain] A categorization of investments (securities, debt instruments, other instruments) according to the security series.    
Investment Securities Class [Axis] A categorization of investments (securities, debt instruments, other instruments) according to the security class.    
Investment Securities Class [Domain] A categorization of investments (securities, debt instruments, other instruments) according to the security class.    
Investment [Line Items] Line items represent reporting concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Investment Title Title of the investment. This may include a brief description of the investment.    
Investment CFI Code CFI code (Classification of Financial Instruments) of the investment.    
Investment Interest Rate Type Description of the interest rate as being fixed, variable, stepped, etc.    
Investment Interest Rate The interest rate for investments that have an interest rate. For fixed rate investments, this indicates the fixed interest rate. If the investment has a variable interest rate, the rate stated here may be the rate that is currently relevant. In this case the "Investment, Interest Rate is Current Rate for Variable Rate Investment Flag", "Investment, Interest Rate is Discount Rate at Purchase Flag", "Investment, Interest Rate Reflects Current Yield Flag" should be used. If one of these flags are not appropriate to explain the interest rate that is indicated, then a new flag should be added or an explanation should be included in "Investment, Additional Information".    
Investment Interest Rate Range [Abstract] The interest rate range for debt instruments reported on the Schedule of Investments.    
Investment Interest Rate Range Start The lowest interest rate in the aggregated short-term debt instruments.    
Investment Interest Rate Range End The highest interest rate in the aggregated short-term debt instruments.    
Investment Maturity Date The maturity date of the investment.    
Investment Maturity Date Range [Abstract] The maturity date range of the underlying investments reported on the Schedule of Investments.    
Investment Maturity Date Range Start The earliest maturity date when short-term debt instruments are reported on the Schedule of Investments.    
Investment Maturity Date Range End The latest maturity date when short-term debt instruments are reported on the Schedule of Investments.    
Investment Repurchase Agreement [Abstract] Line items related specifically to repurchase agreements.    
Investment Repurchase Agreement Name of Party Name of the party or parties to the agreement.    
Investment Repurchase Agreement, Date of Agreement Date the repurchase agreement was made.    
Investment Repurchase Agreement, Amount to be Received Amount to be received on the repurchase date.    
Investment Repurchase Agreement, Repurchase Date Date the repurchase will be made.    
Investment Repurchase Agreement, Description of Investments Subject to Agreement Description of the investments involved in the repurchase agreement.    
Derivative, Counterparty Identification of the name or type of counterparty to the derivative instrument.    
Derivative, Type of Interest Rate Paid on Swap When the derivative or group of derivatives presented is a swap, the type of interest rate (fixed, variable, stepped, etc.) paid on the swap.    
Investment Derivative, Notional Amount [Abstract]      
Derivative, Notional Amount Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.    
Derivative, Nonmonetary Notional Amount Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract.    
Investment Options [Abstract] Information specific to options investments.    
Investment Options, Expiration Date Expiration date of the option.    
Investment Options, Exercise Price Exercise price of the option.    
Investment, Underlying Investment Identifier For investments that are based on other investments (i.e. futures, options, repurchase agreements) the primary identifier for the underlying investment. This should only be included if the underlying security is also listed in the investment table.    
Investment Warrants, Exercise Price Exercise price of the warrants.    
Investment Warrants Expiration Date Expiration date of warrants held.    
Investment Warrants Expiration Date Range [Abstract]      
Investment Warrants Expiration Date Range Start The earliest date of expiration of warrants held.    
Investment Warrants Expiration Date Range End The latest date of expiration of warrants held.    
Investment Foreign Currency, Contract [Abstract]      
Investment Foreign Currency, Contract, Currency The country of origin and name of the national currency of the foreign currency contract (forward, option).    
Investment Foreign Currency, Contract, Transaction Type Flag The entity's designation of its position on the foreign currency contract being described. This flag can only have the values of "Buy" or "Sell".    
Investment Foreign Currency, Contract, Foreign Currency Amount The amount of foreign currency that the entity has contractually agreed, or for which it has the option, to buy or sell with respect to the contract being described.    
Investment Foreign Currency, Contract, Reporting Currency Amount at Date of Origin The reporting currency amount (for example, US dollars) conversion, as of the date of origin, of the foreign currency amount that the entity is obligated or for which it has the option to buy or sell with respect to the contract being described.    
Investment Foreign Currency, Contract, Amount Purchased The amount of a currency that the reporting entity is obligated to purchase at settlement.    
Investment Foreign Currency, Contract, Amount Sold The amount of a currency that the reporting entity is obligated to sell at settlement.    
Investment Contract [Abstract]      
Investment Contract Currency The ISO 3-letter code for the currency in which a contract to buy or sell is denominated.    
Investment Contract Country The ISO 2-letter code for the country of a contract to buy or sell.    
Investment Contract Weight The weight of a commodity or material specified in an investment contract. For this element, weight may be specified using units of weight (such as pounds) or units of mass (such as kilograms) since in commercial practice, the term 'weight' tends to be interchangeable with 'mass'.    
Investment Contract Volume The volume of a commodity or material specified in an investment contract.    
Investment Contract Settlement Date The settlement date of an investment contract.    
Investment Contract Settlement Date Range [Abstract]      
Investment Contract Settlement Date Range Start When an investment contract or contracts have a range of settlement dates, the earliest settlement date.    
Investment Contract Settlement Date Range End When an investment contract or contracts have a range of settlement dates, the latest settlement date.    
Investment, Supplemental Flags [Abstract] A container for additional flags for the investment.    
Investment, Non-Income Producing Flag Indicates if the investment is non-income producing. Evidences of indebtedness and preferred shares may be deemed to be income producing if, on the respective last interest payment date or date for the declaration of dividends prior to the date of the related balance sheet, there was only a partial payment of interest or a declaration of only a partial amount of the dividends payable; in such case, however, each such issue shall be indicated by an appropriate symbol referring to a note to the effect that, on the last interest or dividend date, only partial interest was paid or partial dividends declared. If, on such respective last interest or dividend date, no interest was paid or no cash or in kind dividends declared, the issue shall not be deemed to be income producing. Common shares shall not be deemed to be income producing unless, during the last year preceding the date of the related balance sheet, there was at least one dividend paid upon such common shares.    
Investment, Restricted Cash Flag Indicates the investment is restricted cash.    
Investment, Interest Only Flag Indicates the investment represents the interest only portion of another security.    
Investment, Principal Only Flag Indicates the investment is the principal portion of another security.    
Investment, Step-up Bond, Interest Rate is for Future Date Flag Indicates the investment is a step-up bond that converts to the noted fixed rate at a designated future date.    
Investment, Interest Rate is Current Rate for Variable Rate Investment Flag Indicates whether interest rate is the current interest rate as of the date of the report.    
Investment, Interest Rate is Discount Rate at Purchase Flag Indicates whether the interest rate is the discount rate at the time of the purchase.    
Investment, Interest Rate Reflects Current Yield Flag Indicates the interest rate in the "Investment, Interest Rate" concept is the current yield of the investment as of the date of the report.    
Investment, Defaulted Security Flag Indicates the issuer of the investment has defaulted on the investment.    
Investment, ADR Flag Indicates the investment is an American Depository Receipt for foreign securities.    
Investment, GDR Flag Indicates the investment is an Global Depository Receipt for securities.    
Investment, When Issued Flag Indicates the investment acquired "when issued" (short for "when, as and if issued").    
Investment, Additional Information Additional narrative disclosure about the investment, including any descriptions that are not captured by other line items.    
Investment Identifier [Table] This table lists the identifiers for the investments. An investment may have more than one identifier. Each identifier is from an identifier scheme.    
Investment Identifier Scheme [Axis] The set of investment identifier schemes that can be used for an investment.    
Investment Identifier Scheme [Domain] Lists the schemes that are used to identify investments. If a non-proprietary scheme not already listed is used, a new member should be created for that identifier scheme. If an internal scheme is used, the "Internal Identifier Scheme [Member]" should be used.    
CUSIP [Member] Designates the investment identifier as a CUSIP identifier.    
SEDOL [Member] Designates the investment identifier as a SEDOL identifier.    
DUNS [Member] Designates the investment identifier as a DUNS identifier.    
ISIN [Member] Designates the investment identifier as an ISIN identifier.    
Internal Identifier Scheme [Member] This Investment identifier scheme is used when the investment does not have an identifier in an existing scheme. This scheme indicates that a filer's internal proprietary investment identifier scheme is used for the associated investment identifier. Identifiers in this scheme may not be consistent between filings, even for the same filer. This scheme should not be used for a non-proprietary scheme. If a non-proprietary scheme is used, a new member should be created in the domain identifying the scheme.    
Investment Identifier [Line Items] Line items represent reporting concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Investment Identifier The identifier for an investment. The identifier must be valid for the scheme with which it is associated.    
Deprecated Items [Abstract]      
AOCI Attributable to Parent [Abstract]      
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]      
ASU 2015-01 Transition [Abstract]      
AOCI Attributable to Parent, Net of Tax [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.    
ASU 2017-12 Transition [Abstract]      
ASU 2016-18 Transition [Abstract]      
ASU 2016-01 Transition [Abstract]      
ASU 2014-09 Transition [Abstract]      
Admission [Member] Right or permission to enter. Includes, but is not limited to, entrance to park, ride, attraction, theater, sporting event, and movie.    
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax Amount, after tax, of accumulated gain (loss) on derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.    
AOCI Including Portion Attributable to Noncontrolling Interest, Tax Amount of tax expense (benefit) allocated to accumulated other comprehensive income (loss) including portion attributable to noncontrolling interest.    
AOCI, Derivative Qualifying as Hedge, Excluded Component, Noncontrolling Interest [Member] Accumulated other comprehensive income (loss) from increase (decrease) in value of excluded component of derivative hedge, attributable to noncontrolling interest.    
AOCI, Derivative Qualifying as Hedge, Excluded Component, Parent [Member] Accumulated other comprehensive income (loss) from increase (decrease) in value of excluded component of derivative hedge, attributable to parent.    
AOCI before Tax, Attributable to Parent Amount before tax of increase (decrease) in accumulated equity from transactions and other events and circumstances from non-owner sources, attributable to parent. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners (distributions to owners).    
AOCI Including Portion Attributable to Noncontrolling Interest [Member] Accumulated change in equity from transactions and other events and circumstances from non-owner sources, including the portion attributable to the noncontrolling interest. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners.    
AOCI, Derivative Qualifying as Hedge, Excluded Component, after Tax Amount, after tax, of accumulated gain (loss) from increase (decrease) in value of excluded component of derivative hedge.    
AOCI Tax, Attributable to Parent Amount of tax expense (benefit) allocated to accumulated other comprehensive income (loss) attributable to parent.    
AOCI Attributable to Noncontrolling Interest [Member] Accumulated increase (decrease) in equity from transactions and other events and circumstances from non-owner sources, attributable to the noncontrolling interest. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners.    
Administration of the Treasury, Belgium [Member] Designated tax department of the government of Belgium.    
Australian Taxation Office [Member] Designated tax department of the government of Australia.    
Advanced Approach [Member] Approach for calculating risk-weighted asset, as defined by regulatory framework, by multiplying amount of each asset or exposure by risk-weight percentage associated with type of asset or exposure as determined by Advanced approach.    
Advanced Metering Infrastructure Costs [Member] Rate action of a regulator resulting in capitalization or accrual of costs incurred for installation of advanced metering infrastructure (AMI).    
Area of Land Area of land held.    
Area of Real Estate Property Area of a real estate property.    
Atlantic Destination [Member] Atlantic destinations determined principally based on geographic region as defined by the U.S. Department of Transportation.    
Award Date [Domain] Date or year of grant of equity-based compensation.    
Award Type [Axis] Information by award type pertaining to equity-based compensation.    
Award Date [Axis] Information by date or year of grant, pertaining to equity-based compensation arrangements.    
Above Market Leases [Member] Leases acquired as part of a real property acquisition at above market lease rate.    
Agriculture, Policy [Policy Text Block] Disclosure of accounting policy for agriculture entities.    
Agriculture [Abstract]      
Agriculture [Text Block] The entire disclosure for entities in the agriculture industry.    
Aging of Capitalized Exploratory Well Costs, Period Two [Member] Period two representing second most current aging period of capitalized exploratory well costs which have been capitalized greater than one year.    
Aging of Capitalized Exploratory Well Costs, Period Five [Member] Period five representing fifth most current aging period of capitalized exploratory well costs which have been capitalized greater than one year.    
Aging of Capitalized Exploratory Well Costs, Period End Date End date of an aging period of capitalized exploratory well costs which have been capitalized greater than one year, in CCYY-MM-DD format.    
Aging of Capitalized Exploratory Well Costs, Period Four [Member] Period four representing fourth most current aging period of capitalized exploratory well costs which have been capitalized greater than one year.    
Aging of Capitalized Exploratory Well Costs, Period Three [Member] Period three representing third most current aging period of capitalized exploratory well costs which have been capitalized greater than one year.    
Aging of Capitalized Exploratory Well Costs, Period One [Member] Period one representing most current aging period of capitalized exploratory well costs which have been capitalized greater than one year.    
Aging of Capitalized Exploratory Well Costs [Axis] Information about aging of capitalized exploratory well costs which have been capitalized greater than one year.    
Aging of Capitalized Exploratory Well Costs, Period Start Date Start date of an aging period of capitalized exploratory well costs which have been capitalized greater than one year, in CCYY-MM-DD format.    
Aging of Capitalized Exploratory Well Costs, Period Range [Domain] Period, by year or by range of years, for aging of capitalized exploratory well costs which have been capitalized greater than one year.    
Affordable Housing Project Investment, Write-down, Amount Amount of write-down from impairment of an investment in a qualified affordable housing project.    
Affordable Housing Project Investment, Nature of Write-down Description of write-down from impairment of an investment in a qualified affordable housing project.    
Affordable Housing Tax Credits Commitment, Year to be Paid Year in which contingent commitments to qualified affordable housing project investments are expected to be paid, in CCYY format.    
Affordable Housing Program Assessments Amount of expense for Affordable Housing Program (AHP) assessments required by the Federal Home Loan Bank Act of 1932.    
Affordable Housing Program [Text Block] The entire disclosure for Affordable Housing Program (AHP).    
Affordable Housing Program Obligation Amount of obligation related to Affordable Housing Program (AHP) assessments required by the Federal Home Loan Bank Act of 1932.    
Affordable Housing Program Obligation, Period Increase (Decrease) Amount of increase (decrease) of obligation related to Affordable Housing Program (AHP) assessments required by the Federal Home Loan Bank Act of 1932.    
Affordable Housing Program [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.    
Affordable Housing Tax Credits and Other Tax Benefits, Amount Amount of affordable housing tax credits and other tax benefits recognized.    
Artist Advances, Commitments, Amount The amount the entity has committed to make for future artist advances.    
Artist Advances and Royalty Guarantees, Commitments Description of the commitments made for future artist advances payable and royalty guarantees.    
Arrangements and Non-arrangement Transactions [Domain] This item is to be populated with the collective of (i) types (categories) of arrangements of the entity applicable to its revenue-generating activities or operations and non-arrangement transactions, including but not limited to, for instance, sales of product manufactured by the entity, if such comparison of arrangements as a component of all transactions is provided by the entity.    
Accelerated Share Repurchases [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Accelerated Share Repurchases, Adjustment to Recorded Amount The adjustment needed to reconcile previously recorded amounts to the actual aggregate amount paid, whether in cash or other consideration, to acquire all of the shares purchased under an Accelerated Share Repurchase arrangement.    
Accelerated Share Repurchases, Date [Domain] Date upon which the accelerated share repurchase agreement was executed.    
Accelerated Share Repurchases, Final Price Paid Per Share Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time.    
Accelerated Share Repurchases, Date [Axis] Information by date of execution of accelerated share repurchases.    
Accelerated Share Repurchases, Cash or Stock Settlement Description of the nature of the settlement (cash or stock) of the accelerated share repurchases agreement.    
Accelerated Share Repurchase Program, Adjustment The amount needed to adjust previously recorded stockholders' equity balances to the actual aggregate amounts paid, whether in cash or other consideration, to acquire all of the shares purchased under an Accelerated Share Repurchase arrangement.    
Accelerated Share Repurchases, Settlement (Payment) or Receipt Amount of cash receipt from (payment to) bank; or stock received from (issuance to) bank in the settlement of the accelerated share repurchase agreement.    
Accelerated Share Repurchases, Initial Price Paid Per Share The price paid per share to immediately purchase the targeted number of shares on the date of executing the accelerated share repurchase agreement.    
Accelerated Share Repurchases [Table] A table reflecting activity in an accelerated share repurchase (ASR) program.    
Accelerated Share Repurchases [Table Text Block] Tabular disclosure of accelerated share repurchase (ASR) programs.  An ASR is a combination of transactions that permits an entity to purchase a targeted number of shares immediately with the final purchase price of those shares determined by an average market price over a fixed period of time. An accelerated share repurchase program is intended to combine the immediate share retirement benefits of a tender offer with the market impact and pricing benefits of a disciplined daily open market stock repurchase program.  ASRs can be disclosed as part of stockholders' equity.    
Accelerated Share Repurchases, Description of Adjustment to Initial Price Paid Describe details of the adjustment to the initial price paid.  The adjustment may include the bank's carrying costs, compensation for ordinary dividends declared by the company during the settlement period, and interest benefits for receiving payments in advance of the anticipated purchases by the bank in the open market during the settlement period. Element was deprecated because of low usage. 2016-01-31
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Level of Subordination This item represents the current level of subordination of the entity's receipt of consideration should the assets underlying the security be liquidated when the level of subordination was considered as one of the potential factors in reaching a conclusion that the available-for-sale investments are not other-than-temporarily impaired.    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Third Party Guarantees [Abstract]      
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Third Party Guarantees, Description Description of third party guarantees against loss of value in the underlying assets related to available-for-sale security in an unrealized loss position and for which other-than-temporary impairment (OTTI) has not been recognized.    
Debt Securities, Available-for-sale, Transfer to Trading, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment Amount of unrealized gain (loss) recognized in earnings from transfer of investment in debt security measured at fair value with change in fair value recognized in other comprehensive (available-for-sale) to investment in debt security measured at fair value with change in fair value recognized in net income (trading). Excludes other-than-temporary impairment (OTTI) previously recognized in other comprehensive income (OCI).    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Key Performance Indicator [Abstract]      
Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.    
Available-for-sale Securities, Gross Unrealized Gain (Loss) Amount of unrealized gain (loss) on investments in debt and equity securities classified as available-for-sale securities. Element deprecated due to redundancy. 2018-01-31
Debt Securities, Available-for-sale, Sold at Par Value Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with interest rate reset through auction process, sold at par value.    
Debt Securities, Available-for-sale, Realized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]      
Available-for-sale Securities, Restricted, Noncurrent Investments in debt and equity securities which are categorized neither as trading securities nor held-to-maturity securities, which are intended be sold or mature greater than one year from the balance sheet date or the normal operating cycle, whichever is longer, and that are pledged to one or more secured parties who have the right to buy, sell, or re-pledge the collateral. Element was deprecated because of low usage. 2018-01-31
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year Number of investment positions in available-for-sale investments that have been in a continuous unrealized loss position for greater than or equal to a year for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.    
Available-for-sale Securities, Failed Auction, Value The value of securities held, for which the interest rate resets through an auction process, that are categorized neither as trading nor held-to-maturity, that failed to be liquidated through auction.    
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments Amount of loss realized on the sale of debt or equity securities classified as available-for-sale. Excludes other than temporary impairments (OTTI).    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Loan to Collateral Value This item represents the loan to collateral ratio of the underlying assets in the security, represented as a percentage, which was considered as one of the potential factors in reaching a conclusion that the available-for-sale investments are not other-than-temporarily impaired.    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Fair Value Volatility, Rate This item represents the volatility of the security's fair value, represented as a percentage, which was considered as one of the potential factors in reaching a conclusion that the available-for-sale investments are not other-than-temporarily impaired.    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Default Rate This item represents the default rate of the underlying assets in the security that were considered as one of the potential factors in reaching a conclusion that the available-for-sale investments are not other-than-temporarily impaired.    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Initial Investment Date the initial investment in available-for-sale investment in unrealized loss position, in CCYY-MM-DD format.    
Available-for-sale Securities, Restricted, Current Investments in debt and equity securities which are categorized neither as trading securities nor held-to-maturity securities, which are intended be sold or mature within one year from the balance sheet date or the normal operating cycle, whichever is longer, and that are pledged to one or more secured parties who have the right to buy, sell, or re-pledge the collateral. Element was deprecated because of low usage. 2018-01-31
Available-for-sale Securities, Other Disclosure Items [Abstract]   Element was deprecated. 2018-01-31
Debt Securities, Available-for-sale, Maturity, Date Maturity date for investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in CCYY-MM-DD format.    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Third Party Guarantees, Amount Amount of third party guarantees against loss of value in the underlying assets related to available-for-sale security in an unrealized loss position and for which other-than-temporary impairments (OTTI) have not been recognized.    
Available-for-sale Securities [Member] Investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).    
Available-for-sale Securities, Restricted, Disclosure [Abstract]   Element was deprecated. 2018-01-31
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Percentage of Nonperforming Assets This item represents the percentage of nonperforming assets that the underlying assets in the security represent and which were considered as one of the potential factors in reaching a conclusion that the available-for-sale investments are not other-than-temporarily impaired.    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Geographic Concentration This item represents a discussion of the geographic concentration of the underlying assets in the security which was considered as one of the potential factors in reaching a conclusion that the available-for-sale investments are not other-than-temporarily impaired.    
Agency Securities [Member] Securities issued by government sponsored entities.    
Accrued Income Taxes [Abstract]      
Automobiles [Member] Vehicles that are used primarily for transporting people.    
Accident and Health Insurance Product Line [Member] Product line consisting of insurance against loss by illness or injury, including but not limited to medical, dental, disability, workmen's compensation and long-term care.    
Accounting Standards Update 2014-04 [Member] Accounting Standards Update 2014-04 Receivables-Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure (a consensus of the FASB Emerging Issues Task Force).    
Accounting Standards Update 2016-16 [Member] Accounting Standards Update 2016-16 Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory.    
Accounting Guidance [Domain] Previous accounting guidance and the new accounting guidance.    
Accounting Standards Update 2014-14 [Member] Accounting Standards Update 2014-14 Receivables-Troubled Debt Restructurings by Creditors (Subtopic 310-40): Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure (a consensus of the FASB Emerging Issues Task Force).    
Accounting Standards Update 2016-18 [Member] Accounting Standards Update 2016-18 Statement of Cash Flows (Topic 230): Restricted Cash (a consensus of the FASB Emerging Issues Task Force).    
Accounting Changes [Text Block] The entire disclosure for reporting accounting changes, excludes error corrections information.    
Accounting Standards Update 2012-05 [Member] Accounting Standards Update 2012-05 Statement of Cash Flows (Topic 230): Not-for-Profit Entities: Classification of the Sale Proceeds of Donated Financial Assets in the Statement of Cash Flows (a consensus of the FASB Emerging Issues Task Force). Element was deprecated because the guidance from which this element is derived is no longer applicable. 2017-01-31
Accounting Standards Update 2015-04 [Member] Accounting Standards Update 2015-04 Compensation-Retirement Benefits (Topic 715): Practical Expedient for the Measurement Date of an Employer's Defined Benefit Obligation and Plan Assets.    
Accounting Standards Update 2016-09 [Member] Accounting Standards Update 2016-09 Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.    
Accounting Standards Update 2015-11 [Member] Accounting Standards Update 2015-11 Inventory (Topic 330): Simplifying the Measurement of Inventory.    
Accounting Standards Update 2017-15 [Member] Accounting Standards Update 2017-15 Codification Improvements to Topic 995, U.S. Steamship Entities (Elimination of Topic 995).    
Accounting Standards Update 2015-13 [Member] Accounting Standards Update 2015-13 Derivatives and Hedging (Topic 815): Application of the Normal Purchases and Normal Sales Scope Exception to Certain Electricity Contracts within Nodal Energy Markets (a consensus of the FASB Emerging Issues Task Force).    
Accounting Standards Update 2014-11 [Member] Accounting Standards Update 2014-11 Transfers and Servicing (Topic 860): Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures.    
Accounting Standards Update 2017-09 [Member] Accounting Standards Update 2017-09 Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting.    
Accounting for Certain Loans and Debt Securities Acquired in Transfer Disclosure [Text Block] The entire disclosure for certain contractual rights to receive money on demand or on fixed or determinable dates with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Accounting Changes and Error Corrections [Abstract]      
Accounting Standards Update 2014-05 [Member] Accounting Standards Update 2014-05 Service Concession Arrangements (Topic 853): (a consensus of the FASB Emerging Issues Task Force).    
Accounting Standards Update 2016-15 [Member] Accounting Standards Update 2016-15 Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the FASB Emerging Issues Task Force).    
Accounting Standards Update 2013-07 [Member] Accounting Standards Update 2013-07 Presentation of Financial Statements (Topic 205): Liquidation Basis of Accounting.    
Accounting Standards Update 2016-17 [Member] Accounting Standards Update 2016-17 Consolidation (Topic 810): Interests Held through Related Parties That Are under Common Control.    
Accounting Standards Update 2017-05 [Member] Accounting Standards Update 2017-05 Other Income-Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets.    
Accounting Standards Update 2013-04 [Member] Accounting Standards Update 2013-04 Liabilities (Topic 405): Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is Fixed at the Reporting Date. Element was deprecated because the guidance from which this element is derived is no longer applicable. 2017-01-31
Accounting Standards Update 2017-07 [Member] Accounting Standards Update 2017-07 Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.    
Accounting Standards Update 2015-07 [Member] Accounting Standards Update 2015-07 Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent) (a consensus of the FASB Emerging Issues Task Force).    
Accounting Standards Update 2015-01 [Member] Accounting Standards Update 2015-01 Income Statement-Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items.    
Accounting Standards Update 2016-19 [Member] Accounting Standards Update 2016-19 Technical Corrections and Improvements.    
Accounting Standards Update 2015-02 [Member] Accounting Standards Update 2015-02 Consolidation (Topic 810): Amendments to the Consolidation Analysis.    
Accounting Standards Update 2015-05 [Member] Accounting Standards Update 2015-05 Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Fees Paid in a Cloud Computing Arrangement.    
Accounting Standards Update 2015-10 [Member] Accounting Standards Update 2015-10: Technical Corrections and Improvements.    
Accounting Standards Update 2011-04 [Member] Accounting Standards Update 2011-04 Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs.    
Accounting Standards Update 2012-01 [Member] Accounting Standards Update 2012-01 Heath Care Entities (Topic 954): Continuing Care Retirement Communities - Refundable Advance Fees. Element was deprecated because the guidance from which this element is derived is no longer applicable. 2017-01-31
Accounting Standards Update 2017-12 [Member] Accounting Standards Update 2017-12 Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.    
Accounting Policies [Abstract]      
Accounting Standards Update 2016-06 [Member] Accounting Standards Update 2016-06 Derivatives and Hedging (Topic 815): Contingent Put and Call Options in Debt Instruments (a consensus of the FASB Emerging Issues Task Force).    
Accounting Standards Update 2017-04 [Member] Accounting Standards Update 2017-04 Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.    
Accounting Standards Update 2014-16 [Member] Accounting Standards Update 2014-16 Derivatives and Hedging (Topic 815): Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share is More Akin to Debt or to Equity (a consensus of the FASB Emerging Issues Task Force).    
Accounting Standards Update 2016-01 [Member] Accounting Standards Update 2016-01 Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.    
Accounting Changes and Error Corrections [Text Block] The entire disclosure for reporting accounting changes and error corrections. It includes the conveyance of information necessary for a user of the Company's financial information to understand all aspects and required disclosure information concerning all changes and error corrections reported in the Company's financial statements for the period.    
Accounting Standards Update 2015-06 [Member] Accounting Standards Update 2015-06 Earnings Per Share (Topic 260): Effects on Historical Earnings per Unit of Master Limited Partnership Dropdown Transactions (a consensus of the FASB Emerging Issues Task Force).    
Accounting Standards Update 2016-02 [Member] Accounting Standards Update 2016-02 Leases (Topic 842).    
Accounting Standards Update 2010-26 [Member] Accounting Standards Update 2010-26 Financial Services-Insurance (Topic 944): Accounting for Costs Associated with Acquiring or Renewing Insurance Contracts - a consensus of the FASB Emerging Issues Task Force.    
Accounting Standards Update 2017-01 [Member] Accounting Standards Update 2017-01 Business Combinations (Topic 805): Clarifying the Definition of a Business.    
Accounting Standards Update 2017-11 [Member] Accounting Standards Update 2017-11 Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), Derivatives and Hedging (Topic 815): I. Accounting for Certain Financial Instruments with Down Round Features, II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception.    
Accounting Standards Update 2014-13 [Member] Accounting Standards Update 2014-13 Consolidation (Topic 810): Measuring the Financial Assets and the Financial Liabilities of a Consolidated Collateralized Financing Entity (a consensus of the FASB Emerging Issues Task Force).    
Accounting Standards Update 2017-10 [Member] Accounting Standards Update 2017-10 Service Concession Arrangements (Topic 853): Determining the Customer of the Operation Services (a consensus of the FASB Emerging Issues Task Force).    
Accounting Standards Update 2017-08 [Member] Accounting Standards Update 2017-08 Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities.    
Accounting Standards Update 2015-16 [Member] Accounting Standards Update 2015-16 Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments.    
Accounting Standards Update 2012-07 [Member] Accounting Standards Update 2012-07 Entertainment Films (Topic 926): Accounting for Fair Value Information That Arises After the Measurement Date and Its Inclusion in the Impairment Analysis of Unamortized Film Costs. Element was deprecated because the guidance from which this element is derived is no longer applicable. 2017-01-31
Accounting Standards Update 2015-17 [Member] Accounting Standards Update No. 2015-17 Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes.    
Accounting Standards Update 2014-09 [Member] Accounting Standards Update 2014-09 Revenue from Contracts with Customers (Topic 606).    
Accounting Standards Update 2016-04 [Member] Accounting Standards Update 2016-04 Liabilities - Extinguishments of Liabilities (Subtopic 405-20): Recognition of Breakage for Certain Prepaid Stored-Value Products (a consensus of the FASB Emerging Issues Task Force).    
Accounting Standards Update 2015-03 [Member] Accounting Standards Update 2015-03 Interest-Imputation (Topic 835-30): Simplifying the Presentation of Debt Issuance Costs.    
Accounting Standards Update 2012-04 [Member] Accounting Standards Update 2012-04 Technical Corrections and Improvements. Element was deprecated because the guidance from which this element is derived is no longer applicable. 2017-01-31
Accounting Standards Update 2016-05 [Member] Accounting Standards Update 2016-05 Derivatives and Hedging (Topic 815): Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships (a consensus of the FASB Emerging Issues Task Force).    
Accounting Standards Update 2014-01 [Member] Accounting Standards Update 2014-01 Investments-Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects (a consensus of the FASB Emerging Issues Task Force).    
Accounting Standards Update 2014-12 [Member] Accounting Standards Update 2014-12 Compensation-Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period (a consensus of the FASB Emerging Issues Task Force).    
Accounting Standards Update 2016-07 [Member] Accounting Standards Update 2016-07 Investments-Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting.    
Accounts Payable and Accrued Liabilities Disclosure [Text Block] The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period.    
Accounts Payable and Accrued Liabilities [Member] Primary financial statement caption encompassing accounts payable and accrued liabilities.    
Accounts Payable [Member] Obligations incurred and payable to vendors for goods and services received.    
Accounts Payable and Accrued Liabilities, Fair Value Disclosure [Abstract]      
Accounts Receivable, Unapproved Contract Claims, Amount Expected to be Collected within One Year The amount of unbilled receivables, which are expected to be collected within one year, from customers under long-term contracts that have not been billed and were not billable at the date of the statement of financial position.    
Accounts Payable, Current Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accounts Payable and Other Accrued Liabilities, Current Amount of liabilities incurred to vendors for goods and services received, and accrued liabilities classified as other, payable within one year or the normal operating cycle, if longer.    
Accounts Payable and Accrued Liabilities, Noncurrent [Abstract]      
Accounts Payable, Current [Abstract]      
Accounts Receivable, Unapproved Contract Claims The total amount of accounts receivable from customers under long-term contracts or programs associated with unapproved change orders or other similar items subject to uncertainty concerning their determination or ultimate realization.    
Accounts, Notes, Loans and Financing Receivable, Unclassified [Abstract]      
Accounts Payable, Related Parties, Noncurrent Amount of accounts payable to related parties, due after one year or beyond the normal operating cycle, if longer.    
Accounts Payable, Underwriters, Promoters, and Employees Amount of obligation to underwriters, promoters, and employees excluding salaries, wages and amount to related party.    
Contract Receivable Amount billed to customers under long-term contracts or programs but not paid. Excludes amounts due that have been withheld because of retainage provisions in a contract.    
Accounts Payable and Accrued Liabilities, Fair Value Disclosure Fair value portion of trade and related party payables and accrued expenses.    
Accounts Receivable, Gross, Noncurrent Amounts due from customers or clients, more than one year from the balance sheet date, for goods or services that have been delivered or sold in the normal course of business.    
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] The entire disclosure for accounts payable, accrued expenses, and other liabilities that are classified as current at the end of the reporting period.    
Accounts Payable, Related Parties, Current Amount for accounts payable to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accounts Payable, Interest-bearing Carrying value as of the balance sheet date of obligations incurred and payable to vendors that bear interest at either a stated or an imputed rate.    
Accounts Payable and Accrued Liabilities, Current Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.    
Accounts Receivable, Gross, Current Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business.    
Accounts Payable, Other Amount of obligations incurred and payable classified as other.    
Accounts Payable and Accrued Liabilities [Abstract]      
Accounts Payable, Interest-bearing, Interest Rate Reflects the effective interest rate as of the balance sheet date on interest-bearing trade payables.    
Accounts Receivable, Additional Narrative Disclosure Further narrative disclosure of claims held for amounts due a company. Examples include trade accounts receivables, notes receivables, loans receivables, etc.    
Accounts Receivable [Member] Due from customers or clients for goods or services that have been delivered or sold.    
Accounts Payable [Abstract]      
Accounts Receivable, Net For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.    
Accounts Payable and Accrued Liabilities, Current [Abstract]      
Accounts Payable, Trade Carrying value as of the balance sheet date of obligations incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.    
Accounts Receivable from Securitization The amount owed to the reporting entity by counterparties in securitized loan transactions.    
Accounts and Notes Receivable, Net [Abstract]      
Accounts and Notes Receivable, Net Carrying amount as of the balance sheet date, net of allowance for doubtful accounts, of account and note receivables due from other than related parties.    
Accounts Receivable, Net, Current [Abstract]      
Accounts Receivable, Unapproved Contract Claims, Amount [Abstract]      
Accounts Payable, Interest-bearing, Current Carrying value as of the balance sheet date of obligations incurred and payable to vendors that bear interest at either a stated or an imputed rate. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accounts Receivable, Fair Value Disclosure Fair value portion of amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties.    
Accounts Receivable, Net, Noncurrent Amount due from customers or clients, more than one year from the balance sheet date, for goods or services that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.    
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Noncurrent [Text Block] The entire disclosure for accounts payable, accrued expenses, and other liabilities that are classified as noncurrent at the end of the reporting period.    
Accounts Payable, Interest-bearing, Noncurrent Carrying value as of the balance sheet date of obligations incurred and due after one year (or beyond the operating cycle if longer) to vendors that bear interest at either a stated or an imputed rate.    
Accounts Payable and Other Accrued Liabilities Amount of liabilities incurred and payable to vendors for goods and services received, and accrued liabilities classified as other.    
Accounts and Other Receivables, Net, Current Amount, after allowance, receivable from customers, clients, or other third-parties, and receivables classified as other due within one year or the normal operating cycle, if longer.    
Accounts Payable, Trade, Current Carrying value as of the balance sheet date of obligations incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accounts Receivable, Net, Current Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.    
Accounts Payable, Related Parties Amount for accounts payable to related parties.    
Accounts Receivable Additional Disclosures [Abstract]      
Accounts Receivable, Net [Abstract]      
Accounts Payable, Other, Current Amount of obligations incurred classified as other, payable within one year or the normal operating cycle, if longer.    
Accounts Payable, Underwriters, Promoters, and Employees, Current Amount of obligation to underwriters, promoters, and employees excluding salaries, wages and amount to related party, classified as current.    
Accounts Payable, Fair Value Disclosure Fair value portion of liabilities incurred for goods and services received that are used in an entity's business and related party payables.    
Accounts Receivable, Net, Noncurrent [Abstract]      
Accounts Payable and Accrued Liabilities, Noncurrent Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer), including liabilities for compensation costs, fringe benefits other than pension and postretirement obligations, rent, contractual rights and obligations, and statutory obligations.    
Accounts Receivable, Gross For unclassified balance sheet, amounts due from customers or clients for goods or services that have been delivered or sold in the normal course of business.    
Accounts Receivable, Related Parties, Current Amount of receivables arising from transactions with related parties due within one year or the normal operating cycle, if longer.    
Accounts Receivable, Unapproved Contract Claims, Amount Expected to be Collected after One Year Amount of accounts receivable from customers under long-term contracts or programs associated with unapproved change orders or other similar items subject to uncertainty concerning their determination or ultimate realization which is expected to be collected after one year from the balance sheet date.    
Accounts Receivable, Related Parties, Noncurrent Amount of receivables arising from transactions with related parties, due after 1 year (or 1 business cycle).    
Receivable Type [Axis] Information by type of receivable.    
Accounts, Notes, Loans and Financing Receivable, Net, Current [Abstract]      
Billing Status, Type [Axis] Information by billing status of receivables.    
Accounts, Notes, Loans and Financing Receivable, Classified [Abstract]      
Legal Entity of Counterparty, Type [Axis] Information by legal entity of counterparty. A counterparty is the other party that participates in a financial transaction.    
Accounts Receivable, Related Parties For an unclassified balance sheet, amount of receivables arising from transactions with related parties.    
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]      
Accounts Payable Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.    
Industry of Counterparty, Type [Axis] Information by industry of counterparty. A counterparty is the other party that participates in a financial transaction.    
Accounts Payable and Accrued Liabilities Sum of the carrying values as of the balance sheet date of obligations incurred through that date, including liabilities incurred and payable to vendors for goods and services received, taxes, interest, rent and utilities, compensation costs, payroll taxes and fringe benefits (other than pension and postretirement obligations), contractual rights and obligations, and statutory obligations.    
Accounts, Notes, Loans and Financing Receivable [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Accounts, Notes, Loans and Financing Receivable, Net, Current The aggregate of amounts due from customers or clients, within one year of the balance sheet date (or one operating cycle, if longer), for goods or services that have been delivered or sold in the normal course of business and an amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date within one year of the balance sheet, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection and net of any write-downs taken for collection uncertainty on the part of the holder, respectively.    
Accretion (Amortization) of Discounts and Premiums, Investments The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.    
Accretion Expense, Including Asset Retirement Obligations Amount of accretion expense, which includes, but is not limited to, accretion expense from asset retirement obligations, environmental remediation obligations, and other contingencies.    
Accretion Expense Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations.    
Accretion Expense, Including Asset Retirement Obligations [Abstract]      
Accretion of Discount Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of passage of time. Element was deprecated because it has a debit balance attribute. 2016-01-31
Accrual for Environmental Loss Contingencies, Reconciliation of Undiscounted Amount to Recorded Balance [Abstract]      
Accrual for Environmental Loss Contingencies, Discount Rate Rate applied to the undiscounted amount of environmental loss contingencies to arrive at the present value recorded as of the balance sheet date.    
Accrual for Environmental Loss Contingencies, Gross, Fiscal Year Maturity [Abstract]      
Accrual for Taxes Other than Income Taxes Carrying value as of the balance sheet date of obligations incurred and payable for real and property taxes.    
Accrual for Environmental Loss Contingencies, Undiscounted, Fourth Year Undiscounted amount of the accrual for environmental loss contingencies expected to be paid in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Accrual for Environmental Loss Contingencies, Foreign Currency Translation Gain (Loss) Amount of foreign currency translation gain (loss) which decreases (increases) the accrual for environmental loss contingencies.    
Accrual for Environmental Loss Contingencies, Undiscounted, Next Rolling Twelve Months Undiscounted amount of the accrual for environmental loss contingencies expected to be paid in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Element was deprecated because of low usage. 2016-01-31
Accrual for Environmental Loss Contingencies, Undiscounted, after Rolling Year Five Undiscounted amount of the accrual for environmental loss contingencies expected to be paid after the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Element was deprecated because of low usage. 2016-01-31
Accrual for Environmental Loss Contingencies, Undiscounted, Rolling Year Three Undiscounted amount of the accrual for environmental loss contingencies expected to be paid in the third rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Element was deprecated because of low usage. 2016-01-31
Accrual for Environmental Loss Contingencies [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.    
Accrual for Environmental Loss Contingencies Disclosure [Abstract]      
Accrual for Environmental Loss Contingencies, Balance Sheet Classification [Abstract]      
Accrual for Environmental Loss Contingencies, Increase (Decrease) for Currency Translation The Increase or Decrease in the accrual for environmental loss contingencies during the reporting period related to currency translations. Element was deprecated because it was inappropriately modeled. 2016-01-31
Accrual for Environmental Loss Contingencies [Abstract]      
Accrual for Environmental Loss Contingencies, Undiscounted, Second Year Undiscounted amount of the accrual for environmental loss contingencies expected to be paid in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Accrual for Environmental Loss Contingencies, Payments Amount of cash outflow to settle environmental loss contingencies.    
Accrual for Environmental Loss Contingencies, Undiscounted, Rolling Year Four Undiscounted amount of the accrual for environmental loss contingencies expected to be paid in the fourth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Element was deprecated because of low usage. 2016-01-31
Accrual for Environmental Loss Contingencies, Undiscounted, Remainder of Fiscal Year Undiscounted amount of the accrual for environmental loss contingencies expected to be paid in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Accrual for Environmental Loss Contingencies, Undiscounted, Rolling Year Two Undiscounted amount of the accrual for environmental loss contingencies expected to be paid in the second rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Element was deprecated because of low usage. 2016-01-31
Accrual for Environmental Loss Contingencies, Increase (Decrease) for Acquisitions and Divestitures Amount of increase (decrease) in the obligation for environmental loss contingencies from business acquisitions (divestitures).    
Accrual for Environmental Loss Contingencies, Gross, Rolling Maturity [Abstract]   Element was deprecated. 2016-01-31
Accrual for Environmental Loss Contingencies, Material Components Description of the material components comprising environmental loss contingencies, which arose from improper operations by the current or prior site owner or operator.    
Accrual for Environmental Loss Contingencies, Charges to Expense for New Losses Amount of expense for newly incurred environmental loss contingencies. Includes, but is not limited to, remediation expense and interest accretion.    
Accrual for Environmental Loss Contingencies, Payments The aggregate amount disbursed during the reporting period to settle environmental loss contingencies. Element was deprecated because it has a debit balance attribute. 2016-01-31
Accrual for Environmental Loss Contingencies, Material Changes in Accrual Explanation of material changes in the expected aggregate amount of the environmental loss contingencies obligation since the prior balance sheet date, other than those resulting from the pay-down of the obligation.    
Accrual for Environmental Loss Contingencies, Discount Amount of imputed interest necessary to reduce (reconcile) the undiscounted amount of the accrual for environmental loss contingencies to the present value.    
Accrual for Environmental Loss Contingencies, Gross Undiscounted amount of the accrual for environmental loss contingencies.    
Accrual for Environmental Loss Contingencies, Undiscounted, Next Twelve Months Undiscounted amount of the accrual for environmental loss contingencies expected to be paid in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Accrual for Environmental Loss Contingencies, Significant Assumptions Significant assumptions underlying the estimate of the environmental loss contingencies accrual, which represents costs to remediate environmental problems.    
Accrual for Environmental Loss Contingencies, Rolling Maturity [Abstract]   Element was deprecated. 2016-01-31
Accrual for Environmental Loss Contingencies, Undiscounted, Third Year Undiscounted amount of the accrual for environmental loss contingencies expected to be paid in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Accrual, Real and Personal Property Taxes, Uncertainty Description of real and personal property tax accrual as an estimate when the estimate is subject to a substantial measure of uncertainty.    
Accrual for Environmental Loss Contingencies Total costs accrued as of the balance sheet date for environmental loss contingencies.    
Accrual for Environmental Loss Contingencies, Undiscounted, after Fifth Year Undiscounted amount of the accrual for environmental loss contingencies expected to be paid after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Accrual for Environmental Loss Contingencies, Fiscal Year Maturity [Abstract]      
Accrual for Environmental Loss Contingencies, Component Amount Recorded amount of the accrual for a material component of an environmental loss contingency.    
Accrual for Environmental Loss Contingencies, Undiscounted, Rolling Year Five Undiscounted amount of the accrual for environmental loss contingencies expected to be paid in the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Element was deprecated because of low usage. 2016-01-31
Accrual for Environmental Loss Contingencies, Period Increase (Decrease) Increase (decrease) in the accrual for environmental loss contingencies during the reporting period.    
Accrual for Environmental Loss Contingencies, Undiscounted, Fifth Year Undiscounted amount of the accrual for environmental loss contingencies expected to be paid in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Accrual for Environmental Loss Contingencies, Provision for New Losses The amount added to the accrual for newly incurred environmental loss contingencies. These additions include remediation expense and interest accretion. These additions do not relate to changes in the environmental accrual related to a business acquisition or divestiture, to currency movements, or revisions in previously existing estimates. Element was deprecated because it has a credit balance attribute. 2016-01-31
Accrual for Taxes Other than Income Taxes, Current Carrying value as of the balance sheet date of obligations incurred and payable for real and property taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accrual for Environmental Loss Contingencies, Revision in Estimates Amount of expense (reversal of expense) which increases (decreases) the accrual for environmental loss contingencies from revisions in estimates to existing obligations. Excludes changes related to business acquisitions, divestitures, or currency movement.    
Accrued Insurance, Noncurrent Carrying value as of the balance sheet date of obligations incurred through that date and due beyond one year (or beyond one operating cycle if longer) to insurance entities to mitigate potential loss from various risks or to satisfy a promise to provide certain coverages to employees.    
Accrued Liabilities for Commissions, Expense and Taxes The carrying amount for commissions, taxes and other expenses that were incurred but unpaid as of the balance sheet date.    
Accrued Bonuses, Current Carrying value as of the balance sheet date of obligations incurred and payable for incentive compensation awarded to employees and directors or earned by them based on the terms of one or more relevant arrangements. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accrued Utilities Carrying value as of the balance sheet date of obligations incurred through that date and payable for utilities, such as electrical power, heating oil, natural gas, and water.    
Accrued Employee Benefits, Current Carrying value as of the balance sheet date of obligations, excluding pension and other postretirement benefits, incurred through that date and payable for perquisites provided to employees pertaining to services received from them. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accrued Income Receivable [Member] Fees and other revenue recorded based on estimates or specific contractual terms as transactions occur or services are rendered, provided that persuasive evidence exists, the price to the customer is fixed or determinable and collectability is reasonably assured, which have not yet been received as of the balance sheet date.    
Accrued Insurance, Current Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities to mitigate potential loss from various risks or to satisfy a promise to provide certain coverage's to employees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accrued Liabilities, Current Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accrued Vacation Carrying value as of the balance sheet date of obligations incurred and payable for unused vacation time owed to employees based on the entity's vacation benefit given to its employees.    
Accrued Payroll Taxes, Current Carrying value as of the balance sheet date of obligations incurred and payable for statutory payroll taxes incurred through that date and withheld from employees pertaining to services received from them, including entity's matching share of the employees FICA taxes and contributions to the state and federal unemployment insurance programs. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accrued Investment Income Receivable Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments.    
Accrued Liabilities and Other Liabilities Amount of expenses incurred but not yet paid nor invoiced, and liabilities classified as other.    
Accrued Participation Liabilities, Due in Next Operating Cycle The amount of accrued participation liabilities that it expects to pay during the upcoming operating cycle.    
Accrued Salaries Carrying value as of the balance sheet date of the obligations incurred through that date and payable for employees' services provided.    
Accrued Rent, Noncurrent Carrying value as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer) for contractual rent under lease arrangements.    
Accrued Liabilities, Current [Abstract]      
Accrued Liabilities [Abstract]      
Accrued Royalties Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties.    
Accrued Environmental Loss Contingencies, Current Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable in twelve months or in the next operating cycle if longer.    
Accrued Environmental Loss Contingencies, Noncurrent Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable after twelve months or beyond the next operating cycle if longer.    
Accrued Rent, Current Carrying value as of the balance sheet date of obligations incurred through that date and payable for contractual rent under lease arrangements. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accrued Sales Commission, Current Carrying value as of the balance sheet date of obligations incurred through that date and payable for sales commissions. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accrued Salaries, Current Carrying value as of the balance sheet date of the obligations incurred through that date and payable for employees' services provided. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accrued Advertising, Current Carrying value as of the balance sheet date of obligations incurred through that date and payable for advertising of the entity's goods and services. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accrued Capping, Closure, Post-closure and Environmental Costs The amount of estimated costs accrued as of the balance sheet date to comply with regulatory requirements pertaining to the retirement of a waste management facility (such as a landfill or waste treatment facility). Represents the portion that will be paid within one year or the normal operating cycle, if longer.    
Accrued Marketing Costs, Current Carrying value as of the balance sheet date of obligations incurred through that date and payable for the marketing, trade and selling of the entity's goods and services.   Marketing costs would include expenditures for planning and executing the conception, pricing, promotion, and distribution of ideas, goods, and services; costs of public relations and corporate promotions; and obligations incurred and payable for sales discounts, rebates, price protection programs, etc. offered to customers and under government programs. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accrued Royalties, Current Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accrued Capping, Closure, Post-closure and Environmental Costs, Noncurrent The estimated amount of costs required as of the balance sheet date to comply with regulatory requirements pertaining to the retirement of a waste management facility, which will be paid after one year or beyond the normal operating cycle, if longer.    
Accrued Professional Fees, Current Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accrued Liabilities and Other Liabilities [Abstract]      
Accrued Exchange Fee Rebate, Current Carrying value as of the balance sheet date of obligations incurred through that date and payable for rebates of an exchange fee some mutual funds impose on shareholders if they exchange (transfer) to another fund within the same fund group. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accrued Utilities, Current Carrying value as of the balance sheet date of obligations incurred through that date and payable for utilities, such as electrical power, heating oil, natural gas, and water. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accrued Vacation, Current Carrying value as of the balance sheet date of obligations incurred and payable for unused vacation time owed to employees based on the entity's vacation benefit given to its employees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).    
Accrued Reclamation Costs, Current Current portion of reclamation reserve to restore a mining or drilling site to the condition agreed upon within the mining or drilling contract.    
Accrued Sales Commission Carrying value as of the balance sheet date of obligations incurred through that date and payable for sales commissions.    
Gift Card Liability, Current Carrying value as of the balance sheet date of the liability for outstanding gift cards. Retail customers purchase gift cards or gift certificates that can be redeemed at a later date for merchandise or services; those unredeemed represent a liability of the entity because the revenue is being deferred.    
Accrued Fees and Other Revenue Receivable For an unclassified balance sheet, the amount of fees and other revenue, excluding investment income receivable, earned but not yet received, which were recognized in conformity with revenue recognition criteria based on estimates or specific contractual terms.    
Accrued Liabilities, Fair Value Disclosure Fair value portion of accrued expenses.    
Accrued Exchange Fee Rebate Carrying value as of the balance sheet date of obligations incurred through that date and payable for rebates of an exchange fee some mutual funds impose on shareholders if they exchange (transfer) to another fund within the same fund group.    
Accrued Income Taxes, Current Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations.    
Accrued Insurance Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities to mitigate potential loss from various risks or to satisfy a promise to provide certain coverage's to employees.    
Accrued Employee Benefits Carrying value as of the balance sheet date of obligations, excluding pension and other postretirement benefits, incurred through that date and payable for perquisites provided to employees pertaining to services received from them.    
Accrued Professional Fees Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received.    
Accrued Liabilities Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities.    
Accrued Payroll Taxes Carrying value as of the balance sheet date of obligations incurred and payable for statutory payroll taxes incurred through that date and withheld from employees pertaining to services received from them, including entity's matching share of the employees FICA taxes and contributions to the state and federal unemployment insurance programs.    
Accrued Income Taxes Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due.  This amount is the total of current and noncurrent accrued income taxes.    
Accrued Liabilities [Member] This item represents obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered.    
Accrued Advertising Carrying value as of the balance sheet date of obligations incurred through that date and payable for advertising of the entity's goods and services.    
Accrued Rent Carrying value as of the balance sheet date of obligations incurred through that date and payable for contractual rent under lease arrangements.    
Accrued Income Taxes, Noncurrent Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due beyond one year or the operating cycle, whichever is longer. Alternate captions include income taxes payable, noncurrent.    
Accrued Bonuses Carrying value as of the balance sheet date of obligations incurred and payable for incentive compensation awarded to employees and directors or earned by them based on the terms of one or more relevant arrangements.    
Accumulated Amortization, Debt Issuance Costs Amount of accumulated amortization of debt issuance costs.    
Accumulated Depreciation, Depletion and Amortization, Property, Plant and Equipment, Period Increase (Decrease) Amount of increase (decrease) in accumulated depreciation, depletion and amortization of property, plant and equipment.    
Accumulated Depreciation, Depletion and Amortization, Sale or Disposal of Property, Plant and Equipment Amount of decrease in accumulated depreciation, depletion and amortization as a result of sale or disposal of property, plant and equipment.    
Accumulated Distributions in Excess of Net Income [Abstract]      
Accumulated Amortization of Other Deferred Costs Accumulated amortization of other deferred costs capitalized at the end of the reporting period. Does not include deferred finance costs, deferred acquisition costs of insurance companies, or deferred leasing costs for real estate operations.    
Accumulated Net Investment Gain (Loss) Attributable to Noncontrolling Interest [Member] Accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), attributable to noncontrolling interest.    
Accumulated Defined Benefit Plans Adjustment, Net Transition Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive income (loss) related to transition asset (obligation) component of defined benefit plans attributable to the noncontrolling interest.    
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Accumulated other comprehensive income (loss) from gain (loss) of derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent.    
Accumulated Amortization of Debt Issuance Costs, Line of Credit Arrangements Amount of accumulated amortization of debt issuance costs related to line of credit arrangements.    
Accumulated Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Tax Amount, after tax, of accumulated gain (loss) from increase (decrease) in instrument-specific credit risk of financial liability measured under fair value option.    
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive income (loss) related to gain (loss) component of defined benefit plans attributable to the noncontrolling interest.    
Accumulated Other-than-Temporary Impairment Including Portion Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive loss resulting from other-than-temporary impairments (OTTI) of debt securities if a portion of an other-than-temporary impairment has not been recognized in earnings, including the portion attributable to the noncontrolling interest.    
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Debt Securities Total of accumulated other comprehensive loss related to that portion of other than temporary impairment (OTTI) due to factors other than credit losses on debt securities categorized either as available-for-sale or held-to-maturity that an entity does not intend to sell and which it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis of the debt security. The amount represented by this item is net of tax, as applicable.    
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Held-to-maturity, Debt Securities Accumulated other comprehensive loss related to portion of other than temporary impairment (OTTI) due to factors other than credit losses on debt securities categorized as held-to-maturity that an entity does not intend to sell and which it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis of the debt security. The amount represented by this item is net of tax, as applicable.    
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), attributable to parent.    
Accumulated Defined Benefit Plans Adjustment, Net Transition Attributable to Parent [Member] Accumulated other comprehensive income (loss) related to transition asset (obligation) component of defined benefit plans attributable to the parent.    
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive income (loss) resulting from gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges, attributable to the noncontrolling interest.    
Accumulated Other Comprehensive Income (Loss), Derivative Qualifying as Hedge, Excluded Component, Including Portion Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive income (loss) from increase (decrease) in value of excluded component of derivative hedge, including portion attributable to noncontrolling interest.    
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Accumulated other comprehensive income (loss) resulting from gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges, attributable to the parent.    
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Available-for-sale, Debt Securities Accumulated other comprehensive loss related to portion of other than temporary impairment (OTTI) due to factors other than credit losses on debt securities categorized as available-for-sale that an entity does not intend to sell and which it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis of the debt security. The amount represented by this item is net of tax, as applicable.    
Accumulated Other-than-Temporary Impairment Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive loss resulting from other-than-temporary impairments of debt securities if a portion of an other-than-temporary impairment (OTTI) has not been recognized in earnings, attributable to the noncontrolling interest.    
Accumulated Other Comprehensive Income (Loss), Debt Securities, Available-for-sale, Adjustment, after Tax Accumulated unrealized gain (loss), after tax, on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).    
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive income (loss) resulting from foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to the noncontrolling interest.    
AOCI Including Portion Attributable to Noncontrolling Interest, before Tax Amount before tax of increase (decrease) in accumulated equity from transactions and other events and circumstances from non-owner sources, including portion attributable to noncontrolling interest. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners (distributions to owners).    
Accumulated Capitalized Interest Costs Amount of accumulated interest costs capitalized as part of property, plant and equipment cost basis.    
Accumulated Other-than-Temporary Impairment Attributable to Parent [Member] Accumulated other comprehensive loss resulting from other-than-temporary impairments (OTTI) of debt securities if a portion of an other-than-temporary impairment has not been recognized in earnings, attributable to the parent.    
Accumulated Amortization, Debt Issuance Costs, Current Amount of accumulated amortization of debt issuance costs classified as current.    
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive (income) loss related to prior service cost (credit) component of defined benefit plans attributable to the noncontrolling interest.    
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.    
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive (income) loss related to defined benefit plans including the portion attributable to the noncontrolling interest.    
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Debt Securities [Abstract]      
Accumulated Distributions in Excess of Net Income The amount as of the balance sheet date by which cumulative distributions to shareholders (or partners) exceed retained earnings (or accumulated earnings).    
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive income (loss) resulting from foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, including the portion attributable to the noncontrolling interest.    
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Including Portion Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive income (loss) from increase (decrease) in instrument-specific credit risk of financial liability measured under fair value option, including portion attributable to noncontrolling interest.    
Accumulated Amortization, Debt Issuance Costs, Noncurrent Amount of accumulated amortization of debt issuance costs classified as noncurrent.    
Accumulated Other Comprehensive Income (Loss) [Table] Disclosure of information about components of accumulated other comprehensive income (loss).    
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Accumulated other comprehensive (income) loss related to defined benefit plans attributable to the parent.    
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Excluding Capital Leased Assets Cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land or leased assets).    
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Parent [Member] Accumulated other comprehensive income (loss) from increase (decrease) in instrument-specific credit risk of financial liability measured under fair value option, attributable to parent.    
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] Accumulated other comprehensive (income) loss related to prior service cost (credit) component of defined benefit plans attributable to the parent.    
Accumulated Comprehensive Income (Loss), after Adoption of New Accounting Principle The balance in accumulated comprehensive income (loss) after the initial adoption of a new accounting principle. Element deprecated due to redundancy. 2016-01-31
Accumulated Depreciation, Depletion and Amortization, Reclassifications from Property, Plant and Equipment Amount of decrease in accumulated depreciation, depletion and amortization as a result of reclassifications from property, plant and equipment.    
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] Accumulated other comprehensive income (loss) related to gain (loss) component of defined benefit plans attributable to the parent.    
Accumulated Deferred Investment Tax Credit The noncurrent portion of the reserve for accumulated deferred investment tax credits as of the balance sheet date. This is the remaining investment credit, which will reduce the cost of services collected from ratepayers by a ratable portion over the investment's regulatory life.    
Accumulated Other Comprehensive Income (Loss), before Federal Home Loan Bank Assessments Amount of accumulated increase (decrease) in equity from transactions and other events and circumstances from non-owner sources, before Federal Home Loan Bank (FHLBank) assessments. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners (distributions to owners). Includes, but is not limited to, foreign currency translation, certain pension adjustments, unrealized gain (loss) on certain investments in debt and equity securities, other than temporary impairment (OTTI) loss related to factors other than credit loss on available-for-sale and held-to-maturity debt securities, and increase (decrease) in the fair value of derivatives related to the effective portion of a designated cash flow hedge.    
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Including Portion Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive (income) loss related to prior service cost (credit) component of defined benefit plans including the portion attributable to the noncontrolling interest.    
Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive (income) loss related to defined benefit plans attributable to the noncontrolling interest.    
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive income (loss) resulting from gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges, including the portion attributable to the noncontrolling interest.    
Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member] Accumulated other comprehensive income (loss) from gain (loss) of derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, including portion attributable to noncontrolling interest.    
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive income (loss) from increase (decrease) in instrument-specific credit risk of financial liability measured under fair value option, attributable to noncontrolling interest.    
Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member] Accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), including portion attributable to noncontrolling interest.    
Accumulated Gain (Loss), Net, Cash Flow Hedge, Noncontrolling Interest [Member] Accumulated other comprehensive income (loss) from gain (loss) of derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to noncontrolling interest.    
Accumulated Defined Benefit Plans Adjustment, Net Transition Including Portion Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive income (loss) related to transition asset (obligation) component of defined benefit plans including the portion attributable to the noncontrolling interest.    
Accumulated Other Comprehensive Income (Loss) [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Accumulated Distributions in Excess of Net Income [Member] Cumulative distributions to shareholders (or partners) in excess of retained earnings (or accumulated earnings).    
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member] Accumulated other comprehensive income (loss) related to gain (loss) component of defined benefit plans including the portion attributable to the noncontrolling interest.    
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).    
Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Accumulated other comprehensive income (loss) resulting from foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to the parent.    
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.    
AOCI Attributable to Parent [Member] Accumulated increase (decrease) in equity from transactions and other events and circumstances from non-owner sources, attributable to the parent. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners.    
Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]      
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.    
Acquired Finite-lived Intangible Asset, Residual Value The aggregate expected value at the end of their useful life of a major finite-lived intangible asset class acquired during the period either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.    
Acquired Indefinite-lived Intangible Assets [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Acquired Finite-lived Intangible Asset, Weighted-Average Period before Renewal or Extension Weighted average period before the next renewal or extension for intangible assets with renewal or extension terms, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.    
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.    
Film Libraries [Member] Collection of films, motion pictures, videodiscs, videocassettes and any other materials stored on film or other media.    
Acquired Finite-Lived Intangible Assets [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Acquisition Cost Ratio Ratio of non-life acquisition costs to non-life net premiums earned.    
Acquisition Costs, Cumulative The capitalized costs incurred (excluded from amortization), as of the date of the balance sheet, to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties.    
Acquisition-related Costs [Member] Category of acquisition-related costs allocated to (included in) reported pro forma earnings (supplemental pro forma information).    
Acquisition of Content Rights in Exchange for Future Services [Member] The amount of content rights acquired and recognized in balance sheet in exchange for future services.    
Acquisition Costs, Period Cost The capitalized costs incurred during the period (excluded from amortization) to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties.    
Actual Savings Anticipated by Previous Exit Plan Not Achieved as Expected, Outcome and Reasons If actual savings anticipated by the exit plan are not achieved as expected or are achieved in periods other than as expected, this element describes that outcome and its reasons.    
Additional Paid in Capital Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.    
Additional Fair Value Elements [Abstract]      
Additional Cash Flow Elements, Summations [Abstract]      
Additional Cash Flow Elements, Financing Activities [Abstract]      
Additional Cash Flow Elements, Operating Activities [Abstract]      
Additional Charges for Securities Accounts Fees and charges earned in the period on securities accounts of customers, broker-dealers, and other accounts.    
Additional Other Liabilities Disclosure [Abstract]      
Additional Cash Flow Elements [Abstract]      
Additional Financial Information Disclosure [Text Block] The entire disclosures of supplemental information, including descriptions and amounts, related to the balance sheet, income statement, and/or cash flow statement.    
Additional Paid in Capital, Common Stock Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.    
Additional Paid in Capital, Preferred Stock Value received from shareholders in nonredeemable preferred stock related transactions that are in excess of par value, value contributed to an entity and value received from other stock related transactions. Examples of other stock related transactions include, amongst other, certain costs incurred in issuing equity securities, certain dividends and certain tax-based consequences of share-based payments compensation awards. Includes only nonredeemable preferred stock transactions or transactions related to preferred stock that are redeemable solely at the option of the issuer. May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.    
Additional Paid in Capital [Abstract]      
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]      
Additional Charges for Commodity Accounts Fees and charges earned in the period on commodities accounts of customers, broker-dealers, and other accounts.    
Segment Reporting, Additional Information about Entity's Reportable Segments Additional information about the entity or its reportable segments that may contribute to an understanding of the enterprise.    
Additional Paid-in Capital [Member] Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders.    
Additional Funding Agreement Terms [Member] Terms of commitments to provide additional funding under research and development arrangements accounted for as a contract to perform research and development for others.    
Additional Cash and Cash Equivalent Related Text An element designated to encapsulate any additional information related to cash and cash equivalents not otherwise addressed by the existing taxonomy. Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months.    
Additional Collateral, Aggregate Fair Value The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period.    
Additional Cash Flow Elements, Investing Activities [Abstract]      
Additions to Contract Holders Funds The cash inflow from a segregated fund account during the period.    
Additions to Other Assets, Amount Amount of significant additions in the period in other assets (current, noncurrent, or unclassified).    
Additions to Other Assets, Description Explanation of significant additions in the period in other assets (current, noncurrent, or unclassified).    
Adjustable Rate Loans [Member] Loan where the rate is adjusted, moving higher or lower according to changes in a specified reference rate.    
Adjustable Rate Residential Mortgage [Member] Loan to purchase or refinance residential real estate (for example, but not limited to, a home) in which the interest rate is periodically adjusted according to changes in a specified reference rate.    
Adjustment for Long-term Intercompany Transactions, Tax Benefit (Expense) Tax effect of current period adjustment resulting from gains and losses on intercompany foreign currency transactions that are of a long-term-investment nature, that is, settlement is not planned or anticipated in the foreseeable future. Applies when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting entity's financial statements. Reported in equity as part of accumulated other comprehensive income. Element was deprecated because it has a credit balance attribute. 2016-01-31
Adjustment of Warrants Granted for Services Adjustment for noncash service expenses paid for by granting of warrants.    
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net [Abstract]      
Adjustment for Long-term Intercompany Transactions, Net of Tax Current period adjustment resulting from gains and losses on intercompany foreign currency transactions that are of a long-term-investment nature because settlement is not planned or anticipated in the foreseeable future.  Resulting from the entities to the transaction being consolidated, combined, or accounted for by the equity method in the reporting entity's financial statements.    
Amortization The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives.    
Amortization [Abstract]      
Adjustment for Long-term Intercompany Transactions, Gross of Tax Current period adjustment resulting from gains and losses on intercompany foreign currency transactions that are of a long-term-investment nature, that is, settlement is not planned or anticipated in the foreseeable future. Resulting from the entities to the transaction being consolidated, combined, or accounted for by the equity method in the reporting entity's financial statements.    
Adjustment for Long-term Intercompany Transactions, Tax Expense (Benefit) Amount of tax expense (benefit) related to gain (loss) on intercompany foreign currency transactions that are of a long-term-investment nature or settlement is not planned or anticipated in the foreseeable future.    
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Amount of increase (decrease) in additional paid in capital (APIC) resulting from a tax benefit (deficiency) associated with an share-based compensation plan other than an employee stock ownership plan (ESOP).    
Adjustment for Long-term Intercompany Transactions, Net of Tax [Abstract]      
Adjustments to Additional Paid in Capital, Counterparty Default, Subsequent Period Changes, Effect on Equity For periods subsequent to the period in which the entity concludes it is probable that the counterparty (share borrower) to a share-lending arrangement will default, the effect on equity related to the amount of change during the period in the fair value of the entity's shares or the change in probable recoveries associated with the share-lending arrangement that is probable of default. Element was deprecated because of low usage. 2016-01-31
Adjustments to Additional Paid in Capital, Stock Split Amount of decrease in additional paid in capital (APIC) resulting from a stock split in which per-share par value or stated value is not changed proportionately.    
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition Amount of increase to additional paid-in capital (APIC) resulting from recognition of equity-based compensation for restricted stock units.    
Adjustments Related to Tax Withholding for Share-based Compensation The amount of adjustment to stockholders' equity associated with an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.    
Adjustments for Change in Accounting Principle [Axis] Information by type of change in accounting principle. Does not include error corrections.    
Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Requisite Service Period Recognition Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation for stock options.    
Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]      
Adjustments to Additional Paid in Capital, Termination of S Corporation Election Amount of increase in additional paid in capital (APIC) resulting from undistributed earnings on the date of S Corporation election termination. Element was deprecated because of low usage. 2016-01-31
Adjustments to Additional Paid in Capital, Other Amount of other increase (decrease) in additional paid in capital (APIC).    
Adjustments to Additional Paid in Capital, Warrant Issued Amount of increase in additional paid in capital (APIC) resulting from the issuance of warrants. Includes allocation of proceeds of debt securities issued with detachable stock purchase warrants.    
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities The sum of adjustments which are added to or deducted from net income or loss, including the portion attributable to noncontrolling interest, to reflect cash provided by or used in operating activities, in accordance with the indirect cash flow method.    
Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities The aggregate amount of adjustments to net income or loss necessary to remove the effects of all items whose cash effects are investing or financing cash flows. The aggregate amount also includes all noncash expenses and income items which reduce or increase net income and are thus added back or deducted when calculating cash provided by or used in operating activities.    
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]      
Adjustments for New Accounting Principle, Early Adoption [Member] Early adoption of sources of change to generally accepted accounting principles (GAAP) in the United States. The FASB released the FASB Accounting Standards Codification as the authoritative source of literature effective for interim and annual periods ending after September 15, 2009. As part of the Codification process, the FASB issues Accounting Standards Updates to amend the Codification but otherwise the Accounting Standards Updates are not authoritative in their own right. All previous accounting standards (such as FASB Statements of Financial Accounting Standards, FASB Interpretations, FASB Staff Positions, Emerging Issues Task Force Consensuses, other pronouncements of the FASB or other designated bodies, or other forms of GAAP are considered accounting pronouncements) were superseded upon the adoption of the Codification. For an interim period, references to the superseded standards are included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.    
Adjustments to Additional Paid in Capital, Share-based Compensation, Employee Stock Purchase Program, Requisite Service Period Recognition Amount of increase in additional paid-in capital (APIC) from recognition of equity-based compensation for employee stock purchase program.    
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments The amount of subsequent adjustments to additional paid in capital for convertible financial instruments where a component of equity and a component of debt are recognized.    
Adjustments to Additional Paid in Capital, Stock Issued, Own-share Lending Arrangement, Issuance Costs Amount of increase in additional paid in capital (APIC) resulting from issuance costs from a share-lending arrangement entered into, in contemplation of a convertible debt offering or other financing.    
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition [Abstract]      
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation Amount of decrease in additional paid in capital (APIC) resulting from a tax deficiency associated with a share-based compensation plan other than an employee stock ownership plan (ESOP).    
Adjustments to Additional Paid in Capital, Convertible Debt with Conversion Feature Amount of increase (decrease) in additional paid in capital (APIC) resulting from recognition of deferred taxes for convertible debt with a beneficial conversion feature.    
Adjustments to Additional Paid in Capital, Share-based Compensation, Other Long-term Incentive Plans, Requisite Service Period Recognition Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation for other long-term incentive plan.    
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration.    
Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options Changes in additional paid in capital related to exercise of share-based payments awards (such as stock options) and the amount of recognized equity-based compensation during the period (such as nonvested shares).    
Adjustments for New Accounting Pronouncements [Axis] Information by new accounting pronouncement.    
Adjustments to Additional Paid in Capital [Abstract]      
Adjustments for Error Correction [Domain] Represents the types error corrections made to the financial statements.    
Adjustments to Additional Paid in Capital, Dividends in Excess of Retained Earnings Amount of decrease in additional paid in capital (APIC) resulting from dividends legally declared (or paid) in excess of retained earnings balance.    
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt Adjustment to additional paid in capital resulting from the recognition of convertible debt instruments as two separate components - a debt component and an equity component. This bifurcation may result in a basis difference associated with the liability component that represents a temporary difference for purposes of applying accounting for income taxes. The initial recognition of deferred taxes for the tax effect of that temporary difference is as an adjustment to additional paid in capital.    
Adjustments to Additional Paid in Capital, Fair Value Amount of increase (decrease) to additional paid in capital (APIC) resulting from changes in fair value of common and preferred stock issued to employee benefit trust but unearned.    
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation.    
Adjustments of Retained Earnings and Accumulated Other Comprehensive Income (Loss) Due to Application of Measurement Date Provisions [Abstract]   Element was deprecated. 2016-01-31
Adjustments to Additional Paid in Capital, Increase in Carrying Amount of Redeemable Preferred Stock Amount of decrease (increase) in additional paid in capital (APIC) for the increase in carrying amount of redeemable preferred stock.    
Adjustments to Additional Paid in Capital, Counterparty Default, Period of Default, Effect on Equity The effect on equity related to the amount of default related expense recognized in earnings in the period in which the entity concludes it is probable that the counterparty (share borrower) to a share-lending arrangement will default. Element was deprecated because of low usage. 2016-01-31
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit.    
Administrative Services Revenue Amount of revenue from providing administrative services, including, but not limited to, accounting, tax, legal, regulatory filing, and share registration activities of managed funds and investment accounts of independent third parties and related and affiliated entities. Element was deprecated because the financial reporting concept can be conveyed dimensionally. 2018-01-31
Administrative Fees Expense Amount of expense for administrative services provided to the limited liability company (LLC) or limited partnership (LP) by the managing member or general partner, affiliate of managing member or general partner, or affiliate of LLC or LP, for example, but not limited to, salaries, rent, or overhead costs.    
Administrative Service [Member] Administrative assistance, including, but not limited to, accounting, tax, legal, regulatory filing, and share registration of managed fund and investment account of independent third party, and related and affiliated entity.    
Administrative Fees, Description Description of the nature of payments to a managing member or general partner, affiliate of a managing member or general partner, or affiliate of a limited liability company (LLC) or limited partnership (LP) for administrative services provided to the LLC or LP, for example, but is not limited to, salaries, rent, or other overhead costs. Includes a description of the services performed and the amount reimbursed for such services.    
Admissions Revenue Revenue from admissions (for example, tickets to parks, rides and attractions, theaters, sporting events, and movies), as well as patient admissions. Element was deprecated because the financial reporting concept can be conveyed dimensionally. 2018-01-31
Adoption of FAS 158, Employers' Accounting for Defined Benefit Pension and Other Postretirement Plans [Abstract]   Element was deprecated. 2017-01-31
Advance Rent Amount at the balance sheet date that has been received by the entity that represents rents paid in advance.    
Advance Royalties, Noncurrent The amount paid to music publishers, record producers, songwriters, or other artists in advance of their earning royalties from record or music sales. Such an amount is based on contractual terms and is generally nonrefundable. This amount is expected to be consumed after one year or the normal operating cycle, if longer.    
Advance Payments by Borrowers for Taxes and Insurance Summary [Text Block] Disclosure of accumulated prepayments received by financial institutions from borrowers for taxes (for example, property taxes) and insurance (for example, property and catastrophe) which will periodically be remitted to the appropriate governmental agency(ies) or vendor(s) on behalf of the borrower. Element was deprecated because of low usage. 2016-01-31
Advance Payments Netted Against Claim Receivable Amount of advance payments received on the contract before its termination shown as a deduction from the claim receivable related to a termination of a contract.    
Advance Royalties, Current The amount paid to music publishers, record producers, songwriters, or other artists in advance of their earning royalties from record or music sales. Such an amount is based on contractual terms and is generally nonrefundable. This amount is expected to be consumed within one year or the normal operating cycle, if longer.    
Advance Royalties The amount paid to music publishers, record producers, songwriters, or other artists in advance of their earning royalties from record or music sales. Such an amount is based on contractual terms and is generally nonrefundable.    
Advance Payments by Borrowers for Taxes and Insurance Carrying amount of accumulated prepayments received by financial institutions from borrowers for taxes (for example, property taxes) and insurance (for example, property and catastrophe) which will periodically be remitted to the appropriate governmental agency or vendor on behalf of the borrower.    
Advance Royalties [Abstract]      
Advances, Fair Value Disclosure Fair value of Federal Home Loan Bank (FHLBank) advances carried under the fair value option.    
Advances for Gas Exploration, Development and Production Amount Discloses the period end balance sheet amount of advances for gas exploration, development and production.    
Advances from Federal Home Loan Banks Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.    
Advances on Inventory Purchases Carrying value of capitalized payments made in advance for inventory that is expected to be received within one year or the normal operating cycle, if longer.    
Advances to Affiliate Long-Term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. This does not include advances to clients.    
Advances Received on Government Contracts, Not Netted Against Accounts Receivable Advances received on government contracts that are not offset against receivables because they cannot be definitely regarded as payments on account for contract work in progress.    
Advances from Federal Home Loan Banks [Abstract]      
Advertising Cost, Policy, Expensed Advertising Cost [Policy Text Block] Disclosure of accounting policy for advertising costs that are expensed, indicating whether such costs are expensed as incurred or the first period in which the advertising takes place.    
Advertising Expense Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.    
Advertising Revenue Cost Costs incurred and are directly related to generating advertising revenues. Element was deprecated because the financial reporting concept can be conveyed dimensionally. 2018-01-31
Advertising Costs, Policy [Policy Text Block] Disclosure of accounting policy for advertising costs. For those costs that cannot be capitalized, discloses whether such costs are expensed as incurred or the first period in which the advertising takes place. For direct response advertising costs that are capitalized, describes those assets and the accounting policy used, including a description of the qualifying activity, the types of costs capitalized and the related amortization period. An entity also may disclose its accounting policy for cooperative advertising arrangements.    
Advertising [Member] Announcement promoting product, service, or event.    
Advertising Revenue Revenue from the sale of advertising time (such as television and radio) or space (newspaper or magazine pages). May also include advertising, marketing and promotional services rendered during the reporting period. Element was deprecated because the financial reporting concept can be conveyed dimensionally. 2018-01-31
Advertising Barter Transactions, Indeterminable Fair Value Disclosure Discloses information regarding the volume and type of advertising surrendered and received (such as the number of equivalent pages, the number of minutes, or the overall percentage of advertising volume) for each income statement presented, for those advertising barter transactions for which the fair value of the advertising surrendered is not determinable based on an entity's own historical practice of receiving cash, marketable securities, or other consideration that is readily convertible to a known amount of cash for similar advertising from buyers unrelated to the counterparty in the barter transaction.    
Advertising Barter Transactions, Policy [Policy Text Block] Disclosure of accounting policy for advertising barter transactions and may include a description of the transaction and the method used to value the transactions.    
Advertising Barter Transactions, Advertising Barter Costs Total expense recognized from advertising barter transactions for each income statement presented.    
Advertising Barter Transactions [Member] Transactions in which there is a nonmonetary exchange of advertising, or the rights to place advertising, advertising is swapped for equal amounts of cash, or advertising is exchanged for other goods and services.    
Advertising Barter Transactions Description of advertising barter transactions entered into by the entity.    
Advertising Barter Transactions, Advertising Barter Revenue Total revenue recognized from advertising barter transactions for each income statement presented.    
Advertising Costs, Policy, Capitalized Direct Response Advertising [Policy Text Block] Disclosure of accounting policy for capitalizing direct response advertising costs, including a description of the qualifying activity and the types of costs capitalized, and the manner in which capitalized costs are recognized as expense and the basis for the timing thereof. The following amounts may also be disclosed: (1) total advertising costs reported as assets in each balance sheet presented and (2) any write-downs of capitalized advertising costs to net realizable value that are included in advertising expense.    
Advertising Costs, Capitalized Direct Response Advertising, Write-down The amount of any write-down of capitalized direct response advertising costs to net realizable value which is charged against earnings in the period.    
Affiliate Costs Costs associated with revenues arising from an entity that is an affiliate of the reporting entity by means of direct or indirect ownership.    
Aged Short Security Differences This element represents an adjustment, generally a deduction, in the computation of net capital in accordance with regulations applicable to a broker or dealer. Such adjustment is generally associated with operational charges for bookkeeping inefficiencies.    
Aged Fails-to-Deliver Carrying value as of the balance sheet date of obligations incurred arising from failure to deliver securities sold to other parties within time periods specified by regulators, generally by the settlement date.    
Aggregate Indebtedness Total current liabilities of the broker-dealer, less certain exceptions as defined.    
Aggregate Indebtedness [Abstract]      
Agricultural Related Inventory, Feed and Supplies Carrying amount as of the balance sheet date of materials capitalized as inventory because of their use in the growth and maintenance of animals and crops.    
Agricultural Related Inventory, Growing Crops Carrying amount as of the balance sheet date of agricultural goods that are not yet mature and thus have not yet been harvested.    
Agricultural Related Inventory Carrying amount as of the balance sheet date of merchandise or supplies held which are related to plants and animals.    
Agricultural Sector [Member] Sector of the economy consisting of companies engaged in agricultural business activities.    
Agricultural Related Inventory [Abstract]      
Agricultural Related Inventory, Plant Material Carrying amount as of the balance sheet date of products that are used in the growth of plant goods (examples would include seeds, soil, fertilizers and other products).    
Air Transportation Equipment [Member] Equipment used for the primary purpose of air transportation.    
Air Traffic Liability, Current The value of air transportation services sold but as yet unused by the passenger, including sales for air transportation to be provided by the reporting air carrier and air transportation to be provided by another air carrier for whom sales were made. Used to reflect the current portion of the liability (within one year or within the normal operating cycle if longer).    
Aircraft Rental and Landing Fees [Abstract]      
Aircraft Rental and Landing Fees Expenses incurred related to the lease of aircraft from outside third parties that are used in the entity's business operations and direct costs incurred at airports primarily consisting of fees paid to the airport authority for takeoff and landing, gate and facility fees, and other related fees.    
Aircraft Maintenance, Materials, and Repairs Maintenance costs incurred and directly related to services rendered by an entity during the reporting period.  Includes the cost of inspections and repairs, materials and routine maintenance costs for all aircraft and engines.    
Aircraft Rental Expenses incurred related to the lease of aircraft from outside third parties that are used in the entity's business operations.    
Airline Related Inventory, Net [Abstract]      
Airline Capacity Purchase Arrangements [Member] Airline capacity services (air miles) purchased from third-party transportation companies, including regional affiliates.    
Airline, Capacity Purchase Arrangements Costs incurred related to air services provided by third-party transportation companies, including regional affiliates.    
Products and Services [Table] Schedule of each product and service or each group of similar products and services of an entity by various financial or nonfinancial attributes.    
Airline Related Inventory, Aircraft Fuel, Gross Gross amount, as of the balance sheet date, of fuel used in air transportation.    
Airline Related Inventory, Aircraft Parts, Gross Gross amount, as of the balance sheet date, of plant or equipment components to be used for the primary purpose of air transportation.    
Airline Expenses [Abstract]      
Airline Related Inventory, Valuation Reserves The amount of the valuation account as of the balance sheet date which reduces the carrying amount of airline related inventory (including expendable merchandise, goods, commodities, or supplies to be used primarily in air transport of passengers or freight) to net realizable value; takes into consideration such factors as market value, excessive quantities based on expected sales, technological obsolescence, and shrinkage.    
Airline Related Inventory, Net Net carrying amount, as of the balance sheet date, of expendable merchandise, goods, commodities, or supplies to be used primarily in air transport of passengers and freight.    
Airline Cash Flow Elements [Abstract]      
Airline, Products and Services [Abstract]      
Airline Destination [Table Text Block] Tabular disclosure of airline-related information by geographic areas as defined by the U.S. Department of Transportation.    
Airline Related Inventory, Gross [Abstract]      
Airline Property, Plant, and Equipment [Abstract]      
Airline [Abstract]      
Airline Destination Disclosure [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Airline Destination [Table] Schedule of airline-related information by geographic areas as defined by the U.S. Department of Transportation.    
Airline Destination [Domain] Geographic areas as defined by the U.S. Department of Transportation.    
Airline Destinations [Axis] Information about airline-related information by geographic areas as defined by the U.S. Department of Transportation.    
Airline Related Inventory, Gross Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies to be used in air transport of passengers and freight.    
All Certain Loans Acquired in Transfer Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model, End of Period, at Carrying Value The recorded value of all loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable, for which the income recognition model was not applied.    
All Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities, Not Accounted for Using Income Recognition Model, at Carrying Value The recorded value of all loans accounted for as available-for-sale debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable, for which the income recognition model was not applied.    
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model The carrying amount as of the balance sheet date of loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer, for which it was deemed probable at acquisition that the investor would be unable to collect all contractually required payments, and to which the income recognition total model was not applied.    
Other Corporate Bonds [Member] Investments in corporate fixed maturity debt securities classified as other.    
Other Segments [Member] Operating segments classified as other. Excludes intersegment elimination and reconciling items.    
Allocated Share-based Compensation Expense Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.    
Allocated Share-based Compensation Expense, Net of Tax The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.    
Allocations to Policyholders, Policies [Policy Text Block] Disclosure of accounting policy for determining amounts of income and expenses allocated to policyholders and contract holders, excluding the method for determining dividends payable to policyholders and accounting policies pertaining to separate accounts for variable annuity contracts.    
Allowance for Loan and Lease Losses Write-offs, Net Amount, after recoveries, of loans and leases that have been written-off.    
Allowance for Doubtful Accounts, Continuing Operations [Member] A valuation allowance for receivables from continuing operations that are expected to be uncollectible. Element was deprecated due to remodeling of topic area. 2018-01-31
Allowance for Doubtful Accounts, Discontinued Operations [Member] A valuation allowance for receivables from discontinued operations that are expected to be uncollectible. Element was deprecated due to remodeling of topic area. 2018-01-31
SEC Schedule, 12-09, Allowance, Receivable from Insurance Provider [Member] Allowance for portion expected to be uncollectible of receivable for insurance proceeds.    
Allowance for Sales Returns [Member] A valuation allowance for the amount of products sold that the entity expects to be returned by the purchaser. Element was deprecated because the guidance from which this element is derived is no longer applicable. 2018-01-31
Allowance for Franchise Receivables [Member] A valuation allowance for fees and other amounts owed by franchisees to the franchisor that are expected to be uncollectible. Element was deprecated because the guidance from which this element is derived is no longer applicable. 2018-01-31
Allowance for Promotions [Member] A provision (charged either as a reduction of revenue or as an expense such as cost of sales) to relate the costs of certain customer discounts and rewards for the associated revenue. Accruals for trade and sales promotions are recorded primarily at the time a product is sold to the customer based on expected levels of performance. Settlement of these liabilities typically occurs in subsequent periods. Element was deprecated because the guidance from which this element is derived is no longer applicable. 2018-01-31
Allowance for Doubtful Accounts [Member] Allowance established for amounts due that are unlikely to be received. Element was deprecated due to remodeling of topic area. 2018-01-31
Allowance for Credit Losses, Change in Method of Calculating Impairment Amount of allowance for credit losses related to receivables which had been measured under a general allowance for credit losses methodology that are now identified as troubled debt restructurings.    
Allowance for Loan and Lease Loss, Recovery of Bad Debts Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.    
Allowance for Doubtful Other Receivables, Current Amount of valuation allowance for receivables classified as other, due within one year or the normal operating cycle, if longer.    
Allowance for Loan and Lease Losses [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.    
SEC Schedule, 12-09, Allowance, Loan and Lease Loss, Real Estate [Member] Allowance for portion expected to be uncollectible of receivable from loan and lease real estate portfolio.    
SEC Schedule, 12-09, Allowance, Franchise Notes Receivable [Member] Allowance for portion expected to be uncollectible of receivable from written payment obligation owed by franchisee to franchisor.    
Allowance for Loan and Lease Losses, Adjustments, Other Amount of other addition (reduction) in allowance reserve for credit loss.    
Allowance for Notes, Loans and Financing Receivable, Noncurrent A valuation allowance relating to a written agreement to receive money (at a specified future date(s) more than one year from the reporting date, consisting of principal as well as any accrued interest) for the portion that is expected to be uncollectible.    
Allowance for Doubtful Accounts Receivable, Write-offs Amount of direct write-downs of accounts receivable charged against the allowance.    
Allowance for Doubtful Accounts Receivable, Noncurrent A valuation allowance for receivables due to an Entity for more than one year from the balance sheet date that are expected to be uncollectible.    
Allowance for Loan and Lease Losses, Write-offs Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.    
Allowance for Loan and Lease Losses, Loans Acquired Amount of addition to allowance reserve for credit loss arising from purchase of loan and lease portfolios.    
SEC Schedule, 12-09, Allowance, Loss on Finance Receivable [Member] Allowance for portion expected to be uncollectible of investment in contractual right to receive money on demand or on fixed or determinable date recognized as asset in creditor's statement of financial position.    
Allowance for Doubtful Accounts, Noncurrent [Member] A valuation allowance for receivables due to an Entity in excess of one year (or one operating cycle if longer) that are expected to be uncollectible. Element was deprecated due to remodeling of topic area. 2018-01-31
Allowance for Trade Receivables [Member] A valuation allowance for amounts due to an Entity for the sale of goods or services in the normal course of business that are expected to be uncollectible. Element was deprecated due to remodeling of topic area. 2018-01-31
Allowance for Funds Used During Construction, Investing Activities Cash inflow due to change during the period in the allowance for other funds used during construction classified as an investing activity.    
Allowance for Loan and Lease Losses, Foreign Currency Translation Amount of gain (loss) from converting allowance reserve for credit loss to currency of reporting entity from amount denominated or measured in a different currency, which decreases (increases) the allowance for loan and lease losses.    
SEC Schedule, 12-09, Allowance, Notes Receivable [Member] Allowance for portion expected to be uncollectible of receivable from written agreement to receive, at specified future date, money consisting of principal and accrued interest.    
Allowance for Doubtful Accounts Receivable, Recoveries Amount of recoveries of receivables doubtful of collection that were previously charged off.    
Allowance for Loan and Lease Losses, Real Estate The reserve to cover probable credit losses related to specifically identified fixed maturity real estate loans as well as probable credit losses inherent in the remainder of that loan portfolio.    
Allowance for Loans and Leases Receivable [Member] The allowance for loan and lease losses represents the reserve to cover probable credit losses related to specifically identified loans and leases, as well as probable credit losses inherent in the remainder of the loan portfolio as of the balance sheet date. For banks, disclose currently required allocated transfer risk reserves. Include carryover of or adjustments to the allowance for loan losses in connection with business combinations determined to be appropriate. Element was deprecated due to remodeling of topic area. 2018-01-31
Allowance for Doubtful Accounts Receivable, Period Increase (Decrease) Amount of increase (decrease) in the allowance for doubtful accounts.    
SEC Schedule, 12-09, Allowance, Credit Loss [Member] Allowance for credit loss from right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.    
Allowance for Loan and Lease Losses, Period Increase (Decrease) Amount of increase (decrease) of allowance reserve for credit loss.    
Allowance for Doubtful Accounts, Current [Member] A valuation allowance for trade and other receivables due to an Entity within one year (or one operating cycle if longer) that are expected to be uncollectible. Element was deprecated due to remodeling of topic area. 2018-01-31
SEC Schedule, 12-09, Allowance, Reinsurance Recoverable [Member] Allowance for portion expected to be uncollectible of recoverable from reinsurer for paid and unpaid claims and claim settlement expense.    
Allowance for Uncollectible Accounts, Time Sharing Receivables Sold with Recourse [Member] Allowance for uncollectible accounts on receivables sold with recourse that originated with real estate time sharing transactions. Element was deprecated because the guidance from which this element is derived is no longer applicable. 2018-01-31
Allowance for Funds Used During Construction, Policy [Policy Text Block] Disclosure of accounting policy for AFUDC (for example, component of PPE, credit to income statement), information regarding the inclusion in rates (only capitalized if its inclusion in rates is probable) and description of AFUDC (for example, represents the cost of capital used during construction).    
Allowance for Doubtful Accounts Receivable, Current A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.    
Allowance for Credit Losses [Text Block] The entire disclosure for allowance for credit losses.    
Allowance for Loan and Lease Losses, Loans Sold Amount of reduction of allowance reserve for credit loss arising from sale of loan and lease portfolios.    
Allowance for Credit Losses on Financing Receivables [Table Text Block] Tabular disclosure of financing receivables (examples of financing receivables include loans, trade accounts receivable and notes receivable) and activity in the allowance for credit losses account.    
Allowance for Doubtful Accounts Receivable [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.    
Allowance for Doubtful Accounts Receivable For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.    
SEC Schedule, 12-09, Allowance, Loan and Lease Loss [Member] Allowance for portion expected to be uncollectible of receivable from loan and lease portfolio.    
Allowance for Doubtful Accounts, Premiums and Other Receivables The valuation allowance as of the balance sheet date to reduce the gross amount of receivables to estimated net realizable value, which would be presented in parentheses on the face of the balance sheet.    
Allowance for Notes, Loans and Financing Receivable, Current A valuation allowance relating to a written agreement to receive money (at a specified future date(s) within one year from the reporting date (or the normal operating cycle, whichever is longer), consisting of principal as well as any accrued interest) for the portion that is expected to be uncollectible.    
Allowance for Loan and Lease Losses Write-offs, Net [Abstract]      
Allowance for Uncollectible Customer's Liability for Acceptances Represents the reserve against amounts due from customers which are uncollectible or questionable as to collection and which specifically relate to short-term negotiable time drafts drawn on and accepted by an institution (also known banker's acceptances).    
SEC Schedule, 12-09, Allowance, Uncollectible Deductible [Member] Allowance for portion expected to be uncollectible of receivable from insured party for deductible portion of claim.    
SEC Schedule, 12-09, Allowance, Uncollectible Customer's Liability for Acceptances [Member] Allowance for portion expected to be uncollectible of receivable from customer for short-term negotiable time draft drawn on and accepted by financial institution (banker's acceptance).    
SEC Schedule, 12-09, Allowance, Uncollectible Premium Receivable [Member] Allowance for portion expected to be uncollectible of receivable from writing and issuing insurance policy.    
Allowance for Uncollectible Accounts, Time Sharing Transactions [Member] Allowance for uncollectible accounts relating to real estate time sharing receivables. Element was deprecated because the guidance from which this element is derived is no longer applicable. 2018-01-31
SEC Schedule, 12-09, Allowance, Uncollectible Agency Loan [Member] Allowance for portion expected to be uncollectible of receivable from money lent to government agency.    
Alternative Investment, Change in Valuation Technique [true false] Indicates (true false) whether valuation technique or approach changed for measuring alternative investment.    
Alternative Investment, Measurement Input [Extensible List] Indicates measurement input for alternative investment.    
Alternative Investment, Change in Valuation Technique, Reason [Extensible List] Indicates reason valuation technique or approach changed for measuring alternative investment.    
Alternative Investment, Type [Extensible List] Indicates type of alternative investment.    
Alternative Excess Net Capital The amount of net capital in excess of the alternative minimum required net capital.    
Alternative Disclosure on Productive Wells For those unusual situations in which gross and net data cannot be applied, alternative disclosure that adequately describes the registrant's productive wells.    
Alternative Investment, Valuation Technique [Extensible List] Indicates valuation technique for measuring alternative investment.    
Alternative Energy [Member] Power generated from source other than fossil fuel. Source includes, but is not limited to, ethanol, biomass, solar, geothermal, and wind power.    
Alternative Excess Net Capital [Abstract]      
Alternative Investment Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund.    
Alternative Investment, Measurement Input Value of input used to measure alternative investment.    
Alternative Net Capital Requirement [Abstract]      
Alternative Presentation, Lessor Lease Income [Abstract]      
Alternative Investment, Fair Value Disclosure Fair value of investment in certain entities that calculate net asset value per share. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes measurement of net asset value as estimate of fair value. Element was deprecated because the financial reporting concept can be conveyed dimensionally. 2018-01-31
Alternative Investment, Fair Value by Fair Value Hierarchy Level and NAV [Extensible List] Indicates level, within fair value hierarchy and fair value measured at net asset value per share as practical expedient, of alternative investment.    
Alternative Net Capital Requirement Amount of net capital requirement computed under the alternative method allowed under regulatory reporting requirements.    
Cost Center [Axis] Information by cost center.    
Amortization of Deferred Property Taxes The amount of amortization charged against earnings during the period for deferred property taxes.    
Amortization of Debt Discount (Premium) Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.    
Amortization of Deferred Hedge Gains The amount of expense charged against earnings by an Entity to record deferred gains and losses on hedge instruments. Examples include gain on economic hedges, amortization of gain on designated fair value hedge and so forth.    
Amortization Expense Per Unit of Production [Table] A table which provides detailed information for each cost center disclosing the amount of amortization expense (per equivalent physical unit of production if amortization is computed on the basis of physical units or per dollar of gross revenue from production if amortization is computed on the basis of gross revenue).    
Amortization of Acquisition Costs The amount of expense recognized in the current period that reflects the allocation of capitalized costs associated with acquisition of business. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.    
Amortization of Debt Issuance Costs and Discounts Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.    
Amortization of Rate Deferral The periodic expense to reduce the value of the rate deferral asset that is created when utilities under bill customers during periods of rate increases by deferring rate increases. These customers eventually pay higher rates to repay the utility for the rate deferral.    
Amortization of Value of Business Acquired (VOBA) The adjustment that represents the periodic charge against earnings to reduce the value of business acquired (VOBA) over the expected life of the underlying insurance contracts. VOBA reflects the estimated fair value of a life insurance business in force and represents the portion of the cost to acquire the business that is allocated to the value of the right to receive future cash flows from insurance contracts existing at the date of acquisition. Such value is the present value of the actuarially determined projected cash flows for the acquired policies. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.    
Amortization of above and below Market Leases Amount of non-cash amortization of intangible asset (liability) for above and below market leases.    
Amortization of Lease Incentives Amount of amortization of lease incentive costs incurred by the lessor for the benefit of the lessee.    
Amortization of Deferred Leasing Fees This element represents the amortization of deferred leasing fees incurred by the lessor and amortized over the term of the lease. Such fees represent (a) costs to originate a lease incurred in transactions with independent third parties that (i) result directly from and are essential to acquire that lease and (ii) would not have been incurred had that leasing transaction not occurred and (b) certain costs directly related to specified activities performed by the lessor for that lease. Those activities are: evaluating the prospective lessee's financial condition; evaluating and recording guarantees, collateral, and other security arrangements; negotiating lease terms; preparing and processing lease documents; and closing the transaction.    
Amortization of Debt Issuance Costs and Discounts [Abstract]      
Amortization and Depreciation of Decontaminating and Decommissioning Assets The current period expense charged against earnings on decontaminating and decommissioning of facilities used in the normal conduct of business and not intended for resale to allocate or recognize the cost of the assets over their useful lives.    
Amortization Period of Deferred Gain (Loss) on Discontinuation of Foreign Currency Fair Value Hedge Period when adjustments to the carrying value of an interest-bearing hedged item are amortized upon discontinuation of the foreign currency fair value hedge, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.    
Amortization Expense Per Equivalent Unit of Production or Per Dollar of Gross Revenue [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Amortization Period of Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge Period when adjustments to the carrying value of an interest-bearing hedged item are amortized upon discontinuation of the interest rate fair value hedge, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.    
Amortization of Nuclear Fuel Lease The expense charged against earnings for the periodic recognition of capitalized nuclear fuel leases.    
Amortization of Below Market Lease Amount of amortization of acquired leases acquired as part of a real property acquisition at below market lease rate with a finite life.    
Amortization of Debt Issuance Costs Amount of amortization expense attributable to debt issuance costs.    
Amortization of Mortgage Servicing Rights (MSRs) The periodic amortization (in proportion to and over the period of estimated net servicing income or loss) of capitalized servicing rights, which contractually entitle the servicer to receive fees and ancillary revenues for performing billing, collection, disbursement and recordkeeping services in connection with a mortgage portfolio. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.    
Amortization Expense Per Physical Unit of Production Amortization computed on the basis of physical units, with oil and gas converted to a common unit of measure on the basis of their approximate relative energy content.    
Amortization of Advance Royalty The expense charged against earnings for the periodic recognition of the advance royalties. These royalties are paid in one accounting period, but are deducted from earnings over time through amortization. For example, royalties that are required to be paid in advance of production from a mineral, oil, or gas property and amortized over the period of right to produce these items.    
Amortization of Deferred Charges The amount of amortization of deferred charges applied against earnings during the period.    
Amortization of Deferred Sales Commissions The amount of expense recognized in the current period for the periodic realization of capitalized fees that were paid to salespeople, distributors, brokers, and agents at the time of the conclusion of the sale. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.    
Amortization of Power Contracts Emission Credits The expense charged against earnings for the periodic recognition of capitalized costs related to purchasing power, fuel, or emission credits. These items may be purchased in one accounting period but are deducted from earnings over time through amortization.    
Amortization of Regulatory Asset The expense charged against earnings during the period to allocate the capitalized costs of regulatory assets over the periods expected to benefit from such costs.    
Amortization of Deferred Charges [Abstract]      
Amortization of ESOP Award Value of shares committed to be released under an Employee Stock Ownership Plan (ESOP).    
Amortization Expense Per Dollar of Gross Revenue Amortization computed on the basis of current gross revenues (excluding royalty payments and net profits disbursements) from production in relation to future gross revenues, based on current prices (including consideration of changes in existing prices provided only by contractual arrangements), from estimated production of proved oil and gas reserves.    
Amortization of Deferred Loan Origination Fees, Net The net increase(decrease) in interest income during the period representing the allocation of deferred loan origination fees less deferred loan origination costs using the effective interest method over the term of the debt arrangement to which they pertain taking into account the effect of prepayments.    
Amortization Method Qualified Affordable Housing Project Investments Amount of investment in qualified affordable housing projects.    
Amortization of Leased Asset The expense charged against earnings for the periodic recognition of capitalized leases. This element may apply to energy companies that lease mineral producing properties and to other enterprises that capitalize property, plant, or equipment obtained through capital leases.    
Amortization Period of Deferred Gain (Loss) on Discontinuation of Price Risk Fair Value Hedge Period when adjustments to the carrying value of a hedged item are amortized upon discontinuation of the price risk fair value hedge, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.    
Amortization Method Qualified Affordable Housing Project Investments, Amortization Amount of amortization expense of investment in qualified affordable housing projects.    
Amortization of Intangible Assets The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.    
Amortization Period of Deferred Gain (Loss) on Discontinuation of Fair Value Hedge Period when adjustments to the carrying value of an interest-bearing hedged item are amortized upon discontinuation of the fair value hedge, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.    
Amount Available for Dividend Distribution without Affecting Capital Adequacy Requirements The amount of dividends that can be declared or paid without affecting the banking or savings institution's regulatory capital position.    
Amount of Deferred Costs Related to Long-term Contracts Amount of deferred costs for long-term contracts and programs. Includes, but is not limited to, initial tooling costs and deferred production costs.    
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.    
Amount of Impairment to Carrying Amount of Regulatory Assets Discloses the amount of any reduction to the carrying amounts of regulated assets that result from impairment (for example, rate actions of a regulator).    
Amount of Ineffectiveness on Net Investment Hedges Gain (loss) on hedging derivative instrument or the foreign currency transaction gain (loss) on the nonderivative hedging instrument designated as a hedge of a net investment in foreign operations related to hedge ineffectiveness, which is included in earnings in the period.    
Dilutive Securities, Effect on Basic Earnings Per Share, ESOP Convertible Preferred Stock Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise of convertible preferred stock of an employee stock ownership plan (ESOP).    
Amount Recognized in Income Due to Inflationary Accounting The amount that will be recognized through the income statement (as well as the impact on the other financial statements) as part of highly inflationary accounting.    
Amount of Embedded Regulatory Liability Discloses amount of embedded regulatory liabilities within the plant accounts. This may result when the regulatory depreciable life is shorter than the depreciable life generally used for nonregulatory accounting.    
Amount of Regulatory Assistance Received Amount of regulatory assistance received from a federal regulatory agency in conjunction with either an acquisition of a troubled financial institution, transfer of nonperforming assets to a newly-formed entity, or other reorganization.    
Amount of Regulatory Costs Not yet Approved Amount of regulatory costs not yet approved by the regulatory authority.    
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise of stock options or restrictive stock units (RSUs).    
Amount of Embedded Regulatory Asset Discloses amount of embedded regulatory assets within the plant accounts. This may result when the regulatory depreciable life is longer than the depreciable life generally used for nonregulatory accounting.    
Defined Benefit Plan, Amount Recognized in Net Periodic Benefit Cost (Credit) and Other Comprehensive (Income) Loss, before Tax [Abstract]      
Defined Benefit Plan, Amount Recognized in Net Periodic Benefit Cost (Credit) and Other Comprehensive (Income) Loss, before Tax Amount recognized in net periodic benefit cost (credit) and other comprehensive (income) loss.    
Ancillary Fee Income Generated by Servicing Financial Assets, Amount All amounts that are due to the servicer of a financial asset, excluding contractually specified servicing fees and late fees.    
Annual Membership Fees [Member] Annual membership fees collected in advance and recognized in revenue, net of estimated refunds.    
Annuitization Benefit [Member] The benefit in long-duration contracts to provide a guaranteed annuity payment commencing with the annuitization date. The fixed periodic annuity payments may be determined using the higher of the current accumulated account value that exists at the date of annuitization or the guaranteed amount.    
Anticipated Investment Income as Component of Premium Deficiency on Short Duration Contracts, Policy [Policy Text Block] Disclosure of accounting policy for including anticipated yield on investments as a component of calculating premium deficiency on short-duration insurance contracts.    
Anticipated Timing of Inclusion of Costs in Amortization Calculation The anticipated timing of the inclusion of the costs in the amortization computation.    
Antidilutive Securities [Axis] Information by type of antidilutive security.    
Antidilutive Securities Excluded from Computation of Net Income, Per Outstanding Unit, Amount Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic net Income or Loss per outstanding limited partnership unit in the future and that were not included in the computation of diluted net income per limited partnership unit, because to do so would increase net income per unit amounts or decrease loss per unit amounts for the period presented.    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Antidilutive Securities, Name [Domain] Incremental common shares attributable to securities that were not included in diluted earnings per share (EPS) because to do so would increase EPS amounts or decrease loss per share amounts for the period presented.    
Applicability, Impact and Conclusion of Environmental Loss Contingencies [Abstract]      
Applicability and Impact of Environmental Laws The general applicability and impact of environmental laws and regulations upon the entity's business and how the existence of such laws and regulations may continue to give rise to loss contingencies for future environmental remediation.    
Application of Recognition Provisions of FAS 158, Incremental Effects on Balance Sheet [Abstract]   Element was deprecated. 2017-01-31
Artistic-Related Intangible Assets [Member] Artistic-related assets that arise from contractual or legal rights such as those provided by copyright. Include, but are not limited to, plays, operas, ballets, books, magazines, newspapers, other literary works, musical works such as compositions, song lyrics, advertising jingles, pictures, photographs, video and audiovisual material including motion pictures or films, music videos, and television programs.    
Asbestos Issue [Member] Individual or consolidated class action claims alleging that asbestos caused cancer or other illnesses to persons exposed to it.    
Asset Retirement Obligations, Significant Changes Description of the significant increases or decreases in the carrying amount of the asset retirement obligation during the period, such as changes in significant assumptions used to calculate the carrying amount of the asset retirement obligation.    
Asset under Construction [Member] Asset in process of being built.    
Asset, Reporting Currency Denominated, Value The reporting currency-denominated asset value.    
Asset Retirement Obligation, Foreign Currency Translation Amount of the Increase or Decrease in the amount of asset retirement obligations for the period associated with foreign currency translation (to the extent that the entity accounts for the foreign currency effects as a separate component of the change in the liability). Element was deprecated because it was inappropriately modeled. 2016-01-31
Asset Retirement Obligation Disclosure [Text Block] The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.    
Asset Retirement Obligation, Period Increase (Decrease) Amount of increase (decrease) in asset retirement obligations.    
Asset Retirement Obligation Disclosure [Abstract]      
Asset Retirement Obligation The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.    
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.    
Asset Management Income [Member] Primary financial statement caption encompassing fees received from asset management activities.    
Asset Impairment Charges Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.    
Asset Retirement Obligations, Noncurrent Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.    
Asset Management Fees Amount of fixed fee revenue for the management of an investment fund portfolio. Excludes investment advisory, distribution and servicing, and performance fees. Element was deprecated because the financial reporting concept can be conveyed dimensionally. 2018-01-31
Asset Retirement Obligation, Liabilities Incurred Amount of asset retirement obligations incurred during the period.    
Asset Retirement Obligations, Description A general description of the asset retirement obligations and the associated long-lived assets. Description may include the terms of the legal restriction.    
Asset Impairment for Regulatory Action [Member] Rate action of a regulator resulting in capitalization or accrual of asset impairment charges.    
Asset Pledged as Collateral [Member] Asset pledged as collateral.    
Asset Management [Member] Management of investment fund portfolio. Excludes investment advisory, distribution and servicing, and performance fee.    
Asset at Fair Value, Changes in Fair Value Resulting from Changes in Assumptions Amount of increase (decrease) in fair value from changes in the assumptions or model used to calculate the fair value of a contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.    
Asset Recovery Damaged Property Costs, Noncurrent Carrying amount as of the balance sheet date of the portion of the reserved funds established by a utility from customer payments to cover the repair costs of damages from major storms, which repairs are expected to be incurred beyond one year or the normal operating cycle, if longer.    
Asset Management Costs The aggregate costs related to asset management during the reporting period. Element was deprecated because the financial reporting concept can be conveyed dimensionally. 2018-01-31
Asset Recoverable Gas Costs [Member] Rate action of a regulator resulting in capitalization or accrual of gas costs.    
Asset Retirement Obligation [Abstract]      
Asset Retirement Obligation, Cash Paid to Settle Amount of cash paid during the period to settle an asset retirement obligation. Amounts paid to settle an asset retirement obligation are generally included in the operating section of the Statement of Cash Flows.    
Asset-backed Securities [Member] Securities that are primarily serviced by the cash flows of a discrete pool of receivables or other financial assets for example, but not limited to, credit card receivables, car loans, recreational vehicle loans, and mobile home loans.    
Investment Advisory, Management and Administrative Fees [Abstract]   Element was deprecated due to remodeling of topic area. 2018-01-31
Asset Retirement Obligation, Revision of Estimate Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.    
Asset Impairment Charges [Abstract]      
Asset Retirement Obligations, Noncurrent [Abstract]      
Asset Management Arrangement [Member] Contractual agreement in which asset, held for investment purpose, is managed by another party. Includes, but is not limited to, investment advisory, distribution and servicing, and fee.    
Asset Retirement Obligation, Current Current portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.    
Asset Retirement Obligation, Legally Restricted Assets, Fair Value Carrying amount of an asset that is legally restricted for purposes of settling an asset retirement obligation.    
Asset Held in Trust [Member] Asset held in trust.    
Asset Impairment Charges [Text Block] The entire disclosure for the details of the charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value. Disclosure may also include a description of the impaired asset and facts and circumstances leading to the impairment, amount of the impairment loss and where the loss is located in the income statement, method(s) for determining fair value, and the segment in which the impaired asset is reported.    
Asset-Backed Securities, at Carrying Value Investments in notes or bonds that are collateralized by a specific group of underlying assets owned by the issuer of the notes or bonds which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.    
Asset Retirement Obligation [Policy Text Block] Disclosure of accounting policy for legal obligation associated with retirement of long-lived asset that results from acquisition, construction, or development or from normal operation of long-lived asset. Excludes environmental remediation liability from improper or other-than-normal operation of long-lived asset, obligation arising in connection with leased property that meets definition of lease payments or variable lease payments and from plan to sell or otherwise dispose of a long-lived asset.    
Asset Retirement Obligations, Liability Not Recognized Description of an asset retirement obligation for which a liability has not been recognized because fair value cannot be reasonably estimated and the reasons why fair value cannot be reasonably estimated.    
Asset Retirement Obligation Costs [Member] Rate action of a regulator resulting in capitalization or accrual of costs for the retirement of long-lived assets.    
Asset Retirement Obligation, Accretion Expense Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.    
Asset Retirement Obligation, Foreign Currency Translation Gain (Loss) Amount of foreign currency translation gain (loss) which decreases (increases) asset retirement obligations.    
Asset Retirement Obligation, Liabilities Settled Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset.    
Asset Retirement Obligation and Environmental Cost [Policy Text Block] Disclosure of accounting policy for legal obligation associated with retirement of long-lived asset that results from acquisition, construction, or development or from normal operation of long-lived asset, and environmental remediation liability from improper or other-than-normal operation of long-lived asset. Includes, but is not limited to, timing of recognition and whether obligation is measured on discounted basis.    
Asset Recovery Damaged Property Costs, Current Carrying amount as of the balance sheet date of the portion of the reserved funds established by a utility from customer payments to cover the repair costs of damages from major storms, which repairs are expected to be incurred within one year or the normal operating cycle, if longer. Element deprecated due to redundancy. 2016-01-31
Asset-backed Securities, Securitized Loans and Receivables [Member] Securities that are primarily serviced with cash flows derived financial assets that are being securitized for example, but not limited to, credit card receivables, car loans, recreational vehicle loans, and mobile home loans. Excludes mortgage-backed securities.    
Assets Held-for-sale, Not Part of Disposal Group, Current, Other Amount of other assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer.    
Assets Designated to Closed Block, Investments [Abstract]      
Assets, Fair Value Disclosure [Abstract]      
Assets Designated to Closed Block, Policy Loans Carrying amount of loans to policy holders secured by benefits under insurance policies that are allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block.    
Assets Held-for-sale, Not Part of Disposal Group, Current Amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer.    
Assets Designated to Closed Block, Cash and Cash Equivalents Cash and highly liquid, safe investments that can be readily converted into cash (cash equivalents) allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block.    
Assets Designated to Closed Block, Deferred Tax Asset, Net Amount, after valuation allowance and deferred tax liability, of deferred tax asset pertaining to the closed block.    
Assets Designated to Closed Block, Fixed Maturities, Held-to-maturity, at Amortized Cost Carrying amount of investments in debt securities that are deemed to be held to maturity that are allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block.    
Assets Designated to Closed Block, Trading Securities, Debt Amount of investments in debt securities classified as trading that are held by the closed block.    
Assets Designated to Closed Block [Abstract]      
Assets, Noncurrent, Other than Noncurrent Investments and Property, Plant and Equipment Sum of the carrying amounts as of the balance sheet date of all assets, excluding property, plant, and equipment and other property and investments, that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer. Alternate captions include Total Deferred Charges and Other Assets.    
Assets Held-for-sale, Not Part of Disposal Group Amount of assets held-for-sale that are not part of a disposal group.    
Assets Designated to Closed Block, Real Estate Real estate investments allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block.    
Assets Designated to Closed Block, Fixed Maturity, Available-for-sale, at Fair Value Fair value of investments in debt securities that are deemed to be available for sale that are allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block. Change in fair of such securities is a component of change in other comprehensive income in the period, which is reflected in the closed block disclosure.    
Assets and Liabilities, Lessor [Abstract]      
Assets Designated to Closed Block The sum of cash, cash equivalents, investments and other assets allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block.    
Assets [Abstract]      
Assets, Fair Value Adjustment Amount of addition (reduction) to the amount at which an asset could be incurred (settled) in a current transaction between willing parties.    
Assets, Fair Value Disclosure Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.    
Assets Designated to Closed Block, Income Tax Receivable Amount of tax refunds receivable held by the closed block.    
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Assets Held-for-sale, Not Part of Disposal Group, Other Amount of other assets held-for-sale that are not part of a disposal group.    
Assets Held-for-sale, Not Part of Disposal Group, Current [Abstract]      
Assets Designated to Closed Block, Mortgage Loans on Real Estate Carrying amount of investments in mortgage loans on real estate allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block.    
Assets Disposed of by Method Other than Sale, in Period of Disposition, Gain (Loss) on Disposition Amount of gain (loss) from the disposal of an asset through means other than sale, for example, but not limited to, abandonment, spin-off, and expropriation.    
Assets Designated to Closed Block, Other Long-term Investments Amount of other long-term investments held by the closed block.    
Assets Designated to Closed Block, Other Investments Amount of other investments held by the closed block.    
Assets Designated to Closed Block, Accrued Investment Income Amount of accrued investment income held by the closed block.    
Assets Designated to Closed Block, Other Short-term Investments Amount of other short-term investments held by the closed block.    
Assets under Management, Average Balance The average carrying amount of assets managed during the period by the investment advisor on behalf of investors.    
Assets, Fair Value Disclosure, Recurring This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a recurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. Element was deprecated because the financial reporting concept can be conveyed dimensionally. 2018-01-31
Assets Designated to Closed Block, Equity Securities, Available-for-sale, at Fair Value Fair value of equity securities designated as available for sale, which are allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block. Also a component of change in other comprehensive income in the period, which is reflected in the closed block disclosure.    
Assets Held by Insurance Regulators Carrying amount of cash and investment securities on deposit with state regulatory authorities in connection with capital requirements.    
Assets and Liabilities, Lessee [Abstract]      
Assets Designated to Closed Block, Investments Amount of investments held by the closed block.    
Assets Designated to Closed Block, Other Closed Block Assets Amount of other assets held by the closed block. Excludes other investments.    
Assets Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.    
Assets Designated to Closed Block, Equity Securities, at Fair Value Fair value of equity securities allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block.    
Assets Designated to Closed Block, Short-term Investments Short-term investments allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block.    
Assets Held under Capital Leases [Member] Long lived property, plant or equipment assets held by a lessee through a capital lease arrangement.    
Assets [Member] Probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.    
Assets under Management [Abstract]      
Assets under Management, Carrying Amount The carrying amount of assets an investment adviser manages on behalf of investors.    
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together, Net Credit Losses During Period Amount of net credit losses charged off.    
Assets Held-for-sale, Not Part of Disposal Group [Abstract]      
Assets and Associated Liabilities Accounted for as Secured Borrowings by Type [Axis] The carrying amount and classification of assets and liabilities recognized in the transferor's statement of financial position at the end of each period presented. Element deprecated due to redundancy. 2016-01-31
Assets Designated to Closed Block, Premiums and Other Receivables, Net Amount, after the allowance for doubtful accounts, of premium and other receivables held by the closed block.    
Assets, Fair Value Disclosure, Nonrecurring This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. Element was deprecated because the financial reporting concept can be conveyed dimensionally. 2018-01-31
Assets Designated to Closed Block, Other Investments [Abstract]      
Net Assets [Abstract]      
Assets Held-for-sale, Long Lived, Fair Value Disclosure Fair value portion of assets classified as held for sale.    
Assets, Total [Member] Total assets, when it serves as a benchmark in a concentration of risk calculation, representing the sum of all reported assets as of the balance sheet date.    
Assets Held-in-trust The total amount of cash and securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations.    
Assets of Wholly Owned Real Estate Investment Subsidiaries For banks, amount of real estate assets held by entities that are wholly-owned.    
Disposal Group, Including Discontinued Operation, Assets, Current [Abstract]      
Disposal Group, Including Discontinued Operation, Assets, Current Amount classified as assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.    
Assets Sold under Agreements to Repurchase, Type [Domain] This is the type of such assets (for example, US Treasury Obligations, US Government agency obligations and loans, and so forth). This item may be presented as an element in the table that is disclosed when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under repurchase agreements exceed 10 percent of total assets, as of the most recent balance sheet date.    
Securities or Other Assets Sold under Agreements to Repurchase [Axis] Information by securities or other assets sold under repurchase agreements. Repurchase agreements are agreements under which the transferor (repo party) transfers a security to a transferee (repo counterparty or reverse party) in exchange for cash and concurrently agrees to reacquire that security at a future date for an amount equal to the cash exchanged plus a stipulated interest factor.    
Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Maturity period remaining for repurchase agreements and similar transactions, for example, but not limited to, securities lending arrangements. Element name and standard label in Maturity [numeric lower end] to [numeric higher end] [date measure] [Member] or Maturity Greater Than [low end numeric value] [date measure] [Member] or Maturity Less Than [high end numeric value] [date measure] [Member] formats.    
Disposal Group, Including Discontinued Operation, Assets, Noncurrent [Abstract]      
Assets Needed for Immediate Settlement, Aggregate Fair Value The aggregate fair value of assets needed to immediately settle the derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period.    
Net Assets Amount of net assets (liabilities).    
Assets, Current Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.    
Assets Sold under Agreements to Repurchase, Market Value Market value of assets sold under agreements to repurchase when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under repurchase agreements exceeds 10 percent of total assets.    
Assets Held-in-trust, Current The amount of cash, securities, or other assets held by a third-party trustee pursuant to the terms of an agreement which assets are available to be used by beneficiaries to that agreement only within the specific terms thereof and which agreement is expected to terminate within one year of the balance sheet date (or operating cycle, if longer) at which time the assets held-in-trust will be released or forfeited.    
Assets Sold under Agreements to Repurchase [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Disposal Group, Including Discontinued Operation, Assets Amount classified as assets attributable to disposal group held for sale or disposed of.    
Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Information by maturity period remaining for repurchase agreements and similar transactions, for example, but not limited to, securities lending arrangements. Element name and standard label in Maturity [numeric lower end] to [numeric higher end] [date measure] [Member] or Maturity Greater Than [low end numeric value] [date measure] [Member] or Maturity Less Than [high end numeric value] [date measure] [Member] formats.    
Assets, Current [Abstract]      
Assets Sold under Agreements to Repurchase, Repurchase Liability Amount to be repaid to the counterparty to the repurchase agreement when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under the repurchase agreement exceeds 10 percent of total assets.    
Assets Leased to Others [Member] Long lived, depreciable property, plant or equipment held for lease to others under contractual agreements meeting the criteria for operating lease classification.    
Disposal Group, Including Discontinued Operation, Assets [Abstract]      
Assets Sold under Agreements to Repurchase, Interest Rate Interest rate on the amount to be repaid to the counterparty to the repurchase agreement when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under the repurchase agreement exceeds 10 percent of total assets.    
Assets Held-in-trust, Noncurrent The amount of cash, securities, or other assets held by a third-party trustee pursuant to the terms of an agreement which assets are available to be used by beneficiaries to that agreement only within the specific terms thereof and which agreement is expected to terminate more than one year from the balance sheet date (or operating cycle, if longer) at which time the assets held-in-trust will be released or forfeited.    
Assets, Noncurrent Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer.    
Assets, Noncurrent [Abstract]      
Assets Held-in-trust [Abstract]      
Assets Sold under Agreements to Repurchase, Carrying Amount Carrying amount of assets sold under agreements to repurchase when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under repurchase agreements exceeds 10 percent of total assets.    
Assumed Premiums Earned Amount of earned premiums assumed from other entities.    
Assumed Premiums Written Amount of written premiums assumed from other entities.    
Assumed Liability for Unpaid Claims and Claims Adjustment Expense Liability as of the balance sheet date for the estimated ultimate cost of settling claims and claim adjustment expense relating to insured events that have occurred on or before the balance sheet date for those liabilities owed to another party as a result of assuming another insurer's primary obligation.    
Schedule of Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities [Table] Information related to the key inputs and assumptions used in measuring the fair value of assets obtained or liabilities incurred, as the result of a sale of financial assets, relating to the transferor's continuing involvement, if any, at the time of securitization, asset-backed financing arrangement, or similar transfer (including at a minimum, but not limited to, and if applicable, quantitative information about discount rates, expected prepayments including the expected weighted-average life of prepayable financial assets, and anticipated credit losses, including expected static pool losses).    
Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities, Type of Financial Asset Type of financial asset for which the transferor has a continuing involvement (including interests continued to be held by the transferor).    
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed Estimated rate of prepayment of principal on financial assets regardless of when the transfer occurred.    
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Weighted Average Life Weighted average life of securitized assets regardless of when the transfer occurred, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.    
Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities, Discount Rate Discount rate which is used to value residual cash flows generated by financial assets of the securitization, asset-backed financing arrangement, or similar transfer for initial fair value measurement.    
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Static Pool Losses The effect of expected static pool losses on the fair value of interests that continue to be held by the transferor.  Expected static pool losses can be calculated by summing the actual and projected future credit losses and dividing the sum by the original balance of the pool of assets.    
Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities, Prepayment Speed Estimated rate of prepayment of principal on financial assets for initial fair value measurement.    
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Expected Credit Losses Rate at which principal will not be repaid on securitized financial assets regardless of when the transfer occurred.    
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Other Key Assumption Rate or Value Description of other key inputs and assumptions used in measuring the fair value of financial assets or liabilities that relate to a transferor's continuing involvement.    
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Schedule of Assumptions for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Table] Detailed elements containing information related to the key inputs and assumptions (including, at a minimum, but not limited to, and if applicable, quantitative information about discount rates, expected prepayments including the expected weighted-average life of prepayable financial assets, and anticipated credit losses) used in measuring the fair value of assets or liabilities that relate to the transferor's continuing involvement with transferred financial assets, as of the balance sheet date.    
Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities, Other Key Assumption Value Assumptions used in measuring fair value on date of securitization, asset-backed financing arrangement, or similar transfer of assets or liabilities that relate to a transferor's continuing involvement.    
Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities, Expected Credit Losses Rate at which principal will not be repaid on securitized financial assets, including for example, but not limited to, expected static pool losses for initial fair value measurement.    
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate Discount rate which is used to value residual cash flows generated by financial assets of a securitization, asset-backed financing arrangement, or similar transfer regardless of when the transfer occurred.    
Auction Market Preferred Securities, Stock Series, Title [Domain] Title of series or issue of auction market preferred securities based on rights (names are typically labeled by day of the week, duration between intervals, or combination of both).    
Auction Market Preferred Securities, Stock Series, Value Amount of par or stated value of auction preferred securities. Element was deprecated because of low usage. 2016-01-31
Auction Market Preferred Securities, Dividend, Paid from Earnings The amount of dividends charged against earnings that have been paid to holders of auction market preferred securities. Element was deprecated because of low usage. 2016-01-31
Auction Market Preferred Securities, Stock Series, Schedule of Dividend Distributions [Abstract]   Element was deprecated. 2016-01-31
Auction Market Preferred Securities, Dividend Arrearages Aggregate arrearages in cumulative preferred dividends related to auction market preferred securities. Element was deprecated because the financial reporting concept can be conveyed dimensionally. 2016-01-31
Auction Market Preferred Securities, Stock Series, Liquidation Preference Description of the liquidation preferences that auction market preferred security holders are entitled to. Element was deprecated because of low usage. 2016-01-31
Auction Market Preferred Securities Disclosure [Text Block] The entire disclosure for auction market preferred securities. Disclosure includes the pertinent rights and privileges of the various securities outstanding such as dividend and liquidation preference, participating rights, pertinent dates and voting rights. Auction Market Preferred Stock (AMPS, a/k/a DARTS - Dutch Auction Rate Transferable Securities) is a form of equity security that has priority over common stock in, among other things, the payment of dividends. The securities are characterized by frequent rate setting intervals that lower their interest rate risk, preservation of principal as the securities are sold at par (current interest rates, market conditions, credit worthiness/quality, etc.) are taken into account when interest rates are re-priced. If redeemable, the auction market preferred securities are  redeemable solely at the option of the issuer. Element was deprecated because of low usage. 2016-01-31
Auction Market Preferred Securities, Dividend, Paid from Capital The amount of dividends charged against capital that have been paid to holders of auction market preferred securities. Element was deprecated because of low usage. 2016-01-31
Auction Market Preferred Securities, Stock Series [Table] Schedule of information pertaining to auction market preferred securities, including liquidation preference, liquidation value, par value, rate setting interval, redemption requirements, dividend distributions, roll forward of shares outstanding, shares authorized, aggregate value of auction market preferred securities, variable interest rate earned, and other information necessary to a fair presentation. If redeemable, the auction market preferred securities are redeemable solely at the option of the issuer.    
Auction Market Preferred Securities, Stock Series, Per-Share Redemption Amount The per-share amount at which preferred stock may be called or is subject to redemption through sinking-fund operations or otherwise.    
Auction Market Preferred Securities, Dividend, Cumulative Undistributed If dividends are undistributed, whether it be due to arrears or an unpaid liability, this is the amount outstanding at the end of the period. Element was deprecated because of low usage. 2016-01-31
Auction Market Preferred Securities, Stock Series [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Auction Market Preferred Securities, Dividend, Paid from Earnings and Capital [Abstract]   Element was deprecated. 2016-01-31
Auction Market Preferred Securities, Dividend Arrearages, Per Share This item represents the per share value amount of arrearages in cumulative preferred dividends attributable to auction market preferred securities. Element was deprecated because the financial reporting concept can be conveyed dimensionally. 2016-01-31
Auction Market Preferred Securities, Stock Series, Aggregate Redemption Amount The aggregate amount at which preferred stock may be called or is subject to redemption through sinking-fund operations or otherwise. Element was deprecated because of low usage. 2016-01-31
Auction Market Preferred Securities, Shares, Issued Number of auction market preferred securities shares issued.    
Auction Rate Securities, Noncurrent Amount of securities that are debt instruments (corporate or municipal bonds) that typically have long-term nominal maturities for which the interest rate is reset through an auction process.    
Auction Market Preferred Securities, Shares, Redeemed These are the number of AMPS shares redeemed during the period.    
Auction Market Preferred Securities, Stock Series, Shares Authorized The number of shares of a preferred security the entity has authorized through an auction process.    
Auction Market Preferred Securities, Dividend, Paid from Earnings and Capital The aggregate amount of dividends charged against earnings and capital that have been paid to holders of auction market preferred securities. Element was deprecated because of low usage. 2016-01-31
Auction Market Preferred Securities, Stock Series, Redemption Requirements Description of the redemption requirements for auction market preferred securities. Element was deprecated because of low usage. 2016-01-31
Auction Market Preferred Securities, Stock Series, Par Value Per Share The par value of the auction market preferred security.    
Auction Rate Preferred Securities [Member] Securities that are preferred equity (or debt instruments) for which the dividend (coupon or interest rate) resets through an auction process.    
Auction Market Preferred Securities [Abstract]   Element was deprecated. 2016-01-31
Auction Market Preferred Securities, Stock Series [Axis] Information by title of series or issue of auction market preferred securities.    
Auction Rate Securities [Member] Debt instrument securities (for example, but not limited to, corporate or municipal bonds) that typically have long-term nominal maturities for which the interest rate is reset through an auction process.    
Auction Market Preferred Securities, Stock Series, Liquidation Value The amount of the liquidation value for auction market preferred securities.    
Auction Market Preferred Securities, Stock Series, Variable Interest Rate Earned The interest (or dividend) rates earned on action market preferred securities (on an annual basis or APY) for the period reported.    
Auction Market Preferred Securities, Stock Series, Rate Setting Interval Period in a rate setting interval for auction market preferred securities, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.    
Auction Market Preferred Securities, Shares Outstanding Number of auction market preferred securities shares outstanding.    
Auction Market Preferred Securities, Stock, Shares Outstanding, Period Increase (Decrease) The increase (decrease) in the number of Auction Market Preferred Securities during the period being reported.    
Automobile Loan [Member] Loan to finance the purchase of a vehicle.    
Available-for-sale Securities, Amortized Cost Basis [Abstract]   Element was deprecated. 2018-01-31
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain (Loss), before Tax [Abstract]      
Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]      
Available-for-sale Securities, Balance Sheet, Reported Amounts [Abstract]   Element was deprecated. 2018-01-31
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]      
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in equity securities classified as available-for-sale.    
Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract]      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months.    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost, Rolling Maturity [Abstract]      
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.    
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax Amount before tax of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.    
Available-for-sale Securities Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.    
Available-for-sale Equity Securities, Gross Unrealized Gain Amount of unrealized gain before deducting unrealized loss on investments in equity securities classified as available-for-sale securities.    
Available-for-sale Securities, Gross Unrealized Loss Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities.    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Debt Securities, Available-for-sale, Maturity, Remainder of Fiscal Year, Fair Value Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in remainder of fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Debt Securities, Available-for-sale, Maturity, Remainder of Fiscal Year, Amortized Cost Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in remainder of fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year Number of investment positions in available-for-sale investments in a continuous unrealized loss position for less than one year or normal operating cycle, if longer, for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.    
Available-for-sale Securities, Gross Unrealized Loss [Abstract]   Element was deprecated. 2018-01-31
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]      
Available-for-sale Securities, Short-term Investments, Amortized Cost Amortized cost of short-term investments in debt and equity securities and other forms of securities that provide ownership interests classified as available-for-sale. Element was deprecated due to remodeling of topic area. 2018-01-31
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax The change in unrealized holding gain (loss), net of tax, on available-for-sale securities included in a separate component of shareholders' equity during the period. Element was deprecated due to remodeling of topic area. 2018-01-31
Available-for-sale Equity Securities, Amortized Cost Basis This item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments for other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.    
Debt Securities, Available-for-sale, Unrealized Loss Amount of unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).    
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in equity securities classified as available-for-sale.    
Available-for-sale Securities, Gross Unrealized Gain [Abstract]   Element was deprecated. 2018-01-31
Available-for-sale Securities and Held-to-maturity Securities Amount of debt and equity financial instruments classified as either held-to-maturity or available-for-sale.    
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block] Tabular disclosure of fair value of investments in debt and equity securities in an unrealized loss position categorized neither as held-to-maturity nor trading securities.    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after rolling tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Available-for-sale Securities, Amortized Cost Basis This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.    
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax [Abstract]   Element was deprecated. 2018-01-31
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).    
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position.    
Debt Securities, Available-for-sale, Unrealized Gain Amount of unrealized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).    
Available-for-sale Securities Pledged as Collateral The fair value of available-for-sale securities that serve as collateral for borrowings. Element was deprecated due to remodeling of topic area. 2018-01-31
Available-for-sale Debt Securities, Amortized Cost Basis [Abstract]   Element was deprecated. 2018-01-31
Available-for-sale Equity Securities, Amortized Cost Basis [Abstract]   Element was deprecated. 2018-01-31
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]      
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]   Element was deprecated. 2018-01-31
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax [Abstract]   Element was deprecated. 2018-01-31
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract]      
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in rolling sixth through tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer.    
Available-for-sale Securities and Held-to-maturity Securities [Abstract]   Element was deprecated. 2018-01-31
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract]      
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling Maturity, Fair Value [Abstract]      
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]      
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after rolling tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date.    
Debt Securities, Available-for-sale [Abstract]      
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax [Abstract]   Element was deprecated. 2018-01-31
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Amortized Cost Amortized cost of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in rolling sixth through tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss) before Taxes This item represents the pretax change in net unrealized holding gain (loss) on available-for-sale securities that has been included in accumulated other comprehensive income, a separate component of shareholders' equity, during the period. Element was deprecated due to remodeling of topic area. 2018-01-31
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]      
Available-for-sale Securities Pledged as Collateral for Parenthetical Disclosure [Abstract]   Element was deprecated. 2018-01-31
Available-for-sale Securities, Basis for Valuation, Other than Equity Securities With respect to all current marketable securities, other than equity securities, state, parenthetically or otherwise, the basis of determining the aggregate amount shown in the balance sheet, along with the alternatives of the aggregate cost or the aggregate fair value at the balance sheet date. Element was deprecated and replaced with a more encompassing element. 2016-01-31
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.    
Available-for-sale Equity Securities, Gross Unrealized Loss Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale equity securities.    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Delinquency Rate This item represents the delinquency rate of the underlying assets in the security that were considered as one of the potential factors in reaching a conclusion that the available-for-sale investments are not other-than-temporarily impaired.    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year through fifth year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date.    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year through fifth year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Available-for-sale Securities [Table Text Block] Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.    
Debt Securities, Available-for-sale, Amortized Cost Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).    
Available-for-sale Securities, Current [Abstract]   Element was deprecated. 2018-01-31
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]      
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth fiscal year through tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss Amount of unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer. Element was deprecated because it has a duration period type attribute. 2018-01-31
Available-for-sale Securities, Contracts to Acquire Securities to be Accounted for as Available-for-sale [Abstract]   Element was deprecated. 2018-01-31
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months.    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost Amortized cost of investment in debt security measured at fair value with change recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Available-for-sale Securities, Debt Maturities [Abstract]      
Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract]      
Available-for-sale Securities, Debt Maturities, Basis of Allocation This item represents disclosure of the basis (methodology and assumptions) for allocating securities which do not have a single contractual maturity date, such as mortgage-backed securities, over several maturity groupings. Such securities are classified neither as held-to-maturity nor trading. Element was deprecated because the financial reporting concept can be conveyed dimensionally. 2018-01-31
Debt Securities, Available-for-sale, Current Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.    
Available-for-sale Securities, Current Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer.    
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract]      
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer.    
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.    
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]      
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Available-for-sale Securities, Equity Securities, Current Amount of investments in equity securities and other forms of securities that provide ownership interests classified as available-for-sale, expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer.    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss Amount of unrealized loss on securities classified as available-for-sale. Element was deprecated because it has a duration period type attribute. 2018-01-31
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss Amount of unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months. Element was deprecated because it has a duration period type attribute. 2018-01-31
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), without single maturity date and not allocated over maturity grouping.    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Debt Securities, Available-for-sale Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), without single maturity date and not allocated over maturity grouping.    
Debt Securities, Available-for-sale, Noncurrent Amount of investment in debt security measured at fair value with change in fair value recognized in net income (available-for-sale), classified as noncurrent.    
Available-for-sale Securities, Equity Securities Amount of equity securities categorized neither as held-to-maturity nor as trading.    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), maturing in next fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Nature Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity securities or trading securities (hence equal to available for sale securities) where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the nature of the available-for-sale investments determined to be temporarily impaired.    
Available-for-sale Securities, Transfers to Trading, Gross Losses This item represents the gross amount of losses included in earnings from transfers of securities from the available-for-sale category into the trading category. Such losses represent the unrealized losses included in other comprehensive income associated with the securities transferred from the available-for-sale category to the trading category.    
Available-for-sale Securities, Noncurrent [Abstract]   Element was deprecated. 2018-01-31
Debt Securities, Available-for-sale, Premium on Purchased Options [Policy Text Block] Disclosure of accounting policy for premium paid to acquire option for investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).    
Available-for-sale Securities, Transfers to Trading [Abstract]   Element was deprecated. 2016-01-31
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]      
Available-for-sale Securities, Gross Realized Gains (Losses), Cost Basis (Methodology) of Securities Sold Disclosure of the basis (methodology and assumptions) on which cost was determined (for example, specific identification, average cost, or other allowed methods) in computing realized gain (loss) on securities sold which were categorized neither as held-to-maturity nor trading. Element was deprecated because of low usage. 2016-01-31
Available-for-sale Securities, Gross Realized Losses This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Cause Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity securities or trading securities (hence equal to available for sale securities) where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the cause of the impairment of the available-for-sale investments determined to be temporarily impaired.    
Available-for-sale Securities, Gross Realized Gain (Loss) This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.    
Available-for-sale Securities, Restricted [Abstract]   Element was deprecated. 2018-01-31
Available-for-sale Securities, Gross Losses, Derivatives This item represents, as of the balance sheet date; the gross losses in accumulated other comprehensive income, a separate component of shareholders' equity, for any derivatives that hedged the forecasted acquisition of available-for-sale securities. Element was deprecated because of low usage. 2018-01-31
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]   Element was deprecated. 2018-01-31
Available-for-sale Securities, Restrictions, Additional Information An entity may opt to provide the reader with additional narrative text to better understand the nature of available-for-sale security restrictions. Element was deprecated because of low usage. 2018-01-31
Available-for-sale Securities, Gross Realized Gains This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.    
Available-for-sale Securities, Equity Securities, Noncurrent Equity securities categorized neither as held-to-maturity nor trading which are intended be sold more than one year from the balance sheet date or operating cycle, if longer.    
Available-for-sale Securities, Restricted The carrying amount of securities categorized neither as held-to-maturity nor trading which serve as security for borrowings or other arrangements.    
Available-for-sale Securities, Gross Gains, Derivatives This item represents, as of the balance sheet date; the gross gains in accumulated other comprehensive income, a separate component of shareholders' equity, for any derivatives that hedged the forecasted acquisition of available-for-sale securities. Element was deprecated because of low usage. 2018-01-31
Available-for-sale Securities, Transfers to Trading, Gross Gains Amount of gain included in earnings for reclassification of securities from available-for-sale into trading.    
Available-for-sale Securities, Transfers to Trading, Gains (Losses), Basis (Methodology) of Amount Reclassified This item represents disclosure of the basis (methodology and assumptions) on which the amount reclassified out of accumulated other comprehensive income into earnings was determined (for example, specific identification, average cost, or other allowed methods) for securities transferred from the available-for-sale category to the trading category. Element was deprecated and replaced with a more encompassing element. 2016-01-31
Available-for-sale Securities, Gross Gains (Losses), Derivatives This item represents, as of the balance sheet date; the difference between the gross gains and losses in accumulated other comprehensive income, a separate component of shareholders' equity, for any derivatives that hedged the forecasted acquisition of available-for-sale securities. Element was deprecated because of low usage. 2018-01-31
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds The total amount of proceeds received for the sale of securities, categorized neither as held-to-maturity nor trading securities, during the reporting period. Element was deprecated because it has a credit balance attribute. 2018-01-31
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity securities or trading securities (hence equal to available for sale securities) where amortized cost basis exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of other evidence considered in reaching a conclusion that the available-for-sale investments are not other-than-temporarily impaired, including, for example, performance indicators of the underlying assets in the security (including default rates, delinquency rates and percentage of nonperforming assets), loan to collateral value ratios, third-party guarantees, current levels of subordination, vintage, geographic concentration, industry analyst reports, sector credit ratings, volatility of the security's fair value, and any other relevant information.    
Available-for-sale Securities, Income Tax Expense on Change in Unrealized Holding Gain (Loss) This item represents the tax effects occurring during the period which are related to the net unrealized gain (loss) resulting from changes in the fair [carrying] value during the period of available-for-sale securities. Such tax affects would have been charged or credited directly to other comprehensive income or to related components of shareholders' equity. Element was deprecated due to remodeling of topic area. 2018-01-31
Available-for-sale Securities, Gross Gains (Losses), Derivatives [Abstract]   Element was deprecated. 2018-01-31
Available-for-sale Securities, Gross Unrealized Gain Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Severity Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity securities or trading securities (hence equal to available for sale securities) where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the severity and duration of the temporary impairment of the available-for-sale investments.    
Available-for-sale Securities, Transfers to Trading, Gains (Losses) This item represents the difference between the gross amount of gains (losses) included in earnings for transfers of securities from the available-for-sale category into the trading category. Such net gain (loss) included in earnings represents the net unrealized gain (loss) which had been included in other comprehensive income and is associated with the securities transferred from the available-for-sale category to the trading category.    
Debt Securities, Available-for-sale, Transfer to Trading, Gain (Loss) [Abstract]      
Available-for-sale Securities, Noncurrent Investments in debt and equity securities which are categorized neither as held-to-maturity nor trading and which are intended to be sold or mature more than one year from the balance sheet date or operating cycle, if longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income.    
Average Sales Price and Production Costs Per Unit of Production [Table] Detailed elements that contain information regarding oil production including quantitative production data, average price, and per unit cost data.    
Average Sales Price and Production Costs Per Unit of Production [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Average Remaining Maturity of Foreign Currency Derivatives Average period remaining before foreign currency exchange rate derivatives mature or expire, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.    
Average Collected Cash Balances with Commercial Banks, Federal Home Loan Bank Average amount of collected cash balances with commercial banks the Federal Home Loan Banks (FHLBanks) maintain in return for certain services.    
Oil and Gas Production Type [Axis] Information by type of production of oil and gas.    
Average Production Costs Per Barrel of Oil Equivalents (BOE) Production costs incurred in lifting the oil and gas to the surface during the reporting period divided by the number of barrels of oil equivalents (BOE) produced. Production (or lifting costs) are costs incurred in lifting the oil and gas to the surface and generally include gathering, treating, primary processing, field storage, property taxes and insurance on proved properties, but do not include depreciation, depletion, accretion, amortization, royalties, income taxes, interest, general and administrative and other expenses.    
Average Production Cost Information Summary of significant aspects of production costs of the energy source on a per unit basis. This information is presented in different formats, including certain specific costs, summarized costs or costs in total. Element was deprecated because of low usage. 2016-01-31
Average Term of Credit Risk Derivatives Average period covered by credit risk derivative contracts, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.    
Average Sales Prices The revenues derived from sales of oil or gas in each geographic area during the reporting period divided by the number of barrels of oil produced or thousands of cubic feet of gas produced.    
Balanced Funds [Member] Regulated investment instrument that pools funds from multiple investors to invest principally in a portfolio of securities and money market instruments to match a moderate investment objective.    
Base Rate [Member] Minimum rate investor will accept.    
Below Market Lease, Net [Abstract]      
Below Market Lease, Amortization Income, Next Twelve Months Amount of amortization income for leases with a finite life acquired as part of a real property acquisition at below market lease rate expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Below Market Lease [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.    
Below Market Lease, Acquired Amount of acquired leases acquired as part of a real property acquisition at below market lease rate with a finite life.    
Below Market Lease, Amortization Income, Next Rolling Twelve Months Amount of amortization income for leases with a finite life acquired as part of a real property acquisition at below market lease rate expected to be recognized in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Below Market Lease, Accumulated Amortization Amount of accumulated amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life.    
Below Market Lease, Amortization Income, after Year Five Amount of amortization income for leases with a finite life acquired as part of a real property acquisition at below market lease rate expected to be recognized after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Below Market Lease, Period Increase (Decrease) Amount of increase (decrease) in acquired leases acquired as part of a real property acquisition at below market lease rate with a finite life.    
Below Market Lease, Amortization Income, Year Four Amount of amortization income for leases with a finite life acquired as part of a real property acquisition at below market lease rate expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Below Market Lease [Abstract]      
Below Market Lease, Amortization Income, Year Five Amount of amortization income for leases with a finite life acquired as part of a real property acquisition at below market lease rate expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Below Market Lease, Amortization Income, Remainder of Fiscal Year Amount of amortization income for leases with a finite life acquired as part of a real property acquisition at below market lease rate expected to be recognized in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Below Market Lease, Amortization Income, Year Three Amount of amortization income for leases with a finite life acquired as part of a real property acquisition at below market lease rate expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Below Market Lease, Amortization Income, Rolling Year Five Amount of amortization income for leases with a finite life acquired as part of a real property acquisition at below market lease rate expected to be recognized in the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Below Market Lease, Amortization Income, Year Two Amount of amortization income for leases with a finite life acquired as part of a real property acquisition at below market lease rate expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Below Market Lease, Amortization Income, Rolling after Year Five Amount of amortization income for leases with a finite life acquired as part of a real property acquisition at below market lease rate expected to be recognized after the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Below Market Lease, Net, Amortization Income, Fiscal Year Maturity [Abstract]      
Below Market Lease, Gross Amount before amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life.    
Below Market Lease, Net, Amortization Income, Rolling Maturity [Abstract]      
Below Market Lease, Amortization Income, Maturity Schedule [Abstract]      
Below Market Lease, Amortization Income, Rolling Year Three Amount of amortization income for leases with a finite life acquired as part of a real property acquisition at below market lease rate expected to be recognized in the third rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Below Market Lease, Amortization Income, Rolling Year Two Amount of amortization income for leases with a finite life acquired as part of a real property acquisition at below market lease rate expected to be recognized in the second rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Below Market Lease, Amortization Income, Rolling Year Four Amount of amortization income for leases with a finite life acquired as part of a real property acquisition at below market lease rate expected to be recognized in the fourth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Below Market Lease, Future Amortization Income [Table Text Block] Tabular disclosure of the amount of amortization income expected to be recorded in succeeding fiscal years for leases acquired as part of a real property acquisition at below market lease rate with a finite life.    
Below Market Lease, Net Amount after amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life.    
Broadcasters License Agreement Commitments, Description A description of the commitments for license agreements that have been executed but were not reported because they do not meet the conditions for recording a liability.    
Benefit Claims in Excess of Related Policyholder Balances Expenses related to payments to policyholders that do not represent a return of policyholders balances. Element was deprecated because of low usage. 2016-01-31
Bad Debt Reserve forTax Purposes of Qualified Lender Amount of bad debt reserves for tax purposes of qualified lenders excluded in calculating deferred taxes.    
Balance Sheet Location [Domain] Location in the balance sheet (statement of financial position).    
Balance Sheet Related Disclosures [Abstract]      
Balance Sheet Location [Axis] Information by location on balance sheet (statement of financial position).    
Bank Overdrafts Carrying value as of the balance sheet date of payments made in excess of existing cash balances, which will be honored by the bank but reflected as a loan to the entity. Overdrafts generally have a very short time frame for correction or repayment and are therefore more similar to short-term bank financing than trade financing.    
Bank Overdrafts [Member] Excess drawing from an existing cash balance that is honored by the bank but is owed to the bank.    
Bank Owned Life Insurance Income Earnings on or other increases in the value of the cash surrender value of bank owned life insurance policies.    
Bank Loan Obligations [Member] Investments in debentures, bonds and other debt securities issued by a bank holding company, its subsidiaries, or affiliates.    
Bank Acceptances Executed The amount of the financial institution's obligation to pay the holder of the customer's draft which the financial institution has guaranteed (i.e., Banker's Acceptance).    
Bank Time Deposits [Member] Certificates of deposit (CD) or savings accounts with a fixed term or understanding the customer can only withdraw by giving advanced notice with a bank or other financial institution. A CD is a short to medium-term investment available at banks and savings and loan institutions where a customer agrees to lend money to the institution for a certain amount of time and is paid a predetermined rate of interest.    
Bank Acceptances Executed and Outstanding Carrying amount as of the balance sheet date of drafts and bills of exchange that have been accepted by the reporting bank, or by others for its own account, as its liability to holders of the drafts.    
Bank Loans Amounts due on short-term bank loans secured by customers' securities on the balance sheet date.    
Bank Servicing [Member] Collection and processing of payment on mortgage, credit card and other financial asset held by others.    
Bank Owned Life Insurance The carrying amount of a life insurance policy on an officer, executive or employee for which the reporting entity (a bank) is entitled to proceeds from the policy upon death of the insured or surrender of the insurance policy.    
Banker's Acceptance Disclosures [Table Text Block] Tabular disclosure of short-term negotiable time drafts drawn on and accepted by an institution (also known as banker's acceptances), outstanding and any related unamortized discounts or fee income required to be and included in the financial statement disclosures.    
Bankers Acceptance [Member] Short-term time draft that a bank (drawee) has agreed to pay at maturity by stamping "accepted" over the signature of an officer.    
Banking and Thrift, Other Disclosures [Abstract]      
Banking and Thrift Disclosure [Text Block] The entire disclosure for financial services specifically banking and thrift entities at the end of the reporting period.    
Banking Fees and Commissions [Abstract]   Element was deprecated due to remodeling of topic area. 2018-01-31
Banking [Member] Financial institution accepting customer deposits and providing other financial services. Services include, but are not limited to, lending; issuing credit and debit cards; offering deposit account, mortgage, and guarantee; and bank servicing.    
Banking and Thrift [Abstract]      
Banking Fees and Commissions Those fees and commissions generated from corporate and retail banking related operations of the Broker Dealer. Element was deprecated because the financial reporting concept can be conveyed dimensionally. 2018-01-31
Banking and Thrift, Interest [Abstract]      
Bankruptcy Claims, Amount of Claims Settled Amount of bankruptcy claim settled.    
Bankruptcy Proceedings, Description of Proceedings Description of the bankruptcy proceedings, including the process for emergence from bankruptcy. Does not include a description of management's plans to improve operations to enable the entity to emerge from bankruptcy, or a description of planned facility closings, business exit activities and headcount reduction plans.    
Bankruptcy Claims, Amount of Filed Claims Likely to be Denied Amount of bankruptcy claim filed with bankruptcy court that are likely to be denied.    
Bankruptcy Claims, Number of Claims under Review by Management The aggregate number of claims under review by the management of the entity.    
Bankruptcy Claims, Number of Filed Claims Likely to be Denied The aggregate number of claims filed with the bankruptcy court that are likely to be denied.    
Bankruptcy Claims, Amount of Claims Expunged by Bankruptcy Court Amount of bankruptcy claim filed that bankruptcy court has expunged.    
Bankruptcy Claims, Description of Material Contracts Assumed or Assigned Description of material contracts assumed or assigned by the entity.    
Bankruptcy Claims [Abstract]      
Bankruptcy Claims, Number of Claims Expunged by Bankruptcy Court The aggregate number of claims filed that the bankruptcy court has expunged.    
Bankruptcy Claims, Number of Claims Settled The aggregate number of claims settled.    
Bankruptcy Claims, Amount of Claims Filed Amount of bankruptcy claim filed with bankruptcy court.    
Bankruptcy Claims, Amount of Claims under Review by Management Amount of bankruptcy claim under review by management.    
Bankruptcy Claims, Number Claims Filed The aggregate number of claims filed with the bankruptcy court.    
Bankruptcy Claims, Amount Paid to Settle Claims Amount paid to settle bankruptcy claim.    
Bankruptcy Proceedings, Description of Creditor Committees Discussion of the creditors committees involved in the bankruptcy proceedings.    
Bankruptcy Proceedings, Date Petition for Bankruptcy Filed Date petition for bankruptcy filed with the bankruptcy court, in CCYY-MM-DD format.    
Bankruptcy Claims, Amount of Claims on Material Contracts Rejected Amount of related claims on material contracts rejected (such as leases and purchase commitments). Element was deprecated because of low usage. 2016-01-31
Bankruptcy Proceedings, Court Where Petition Was Filed United States Bankruptcy Court where petition for bankruptcy was filed.    
Bankruptcy Claims, Last Date to File Claims with Bankruptcy Courts Last date (bar date) on which claims can be filed with the bankruptcy court, in CCYY-MM-DD format.    
Bankruptcy Proceedings [Abstract]      
Bankruptcy Claims, Description of Claims Description of the nature of the bankruptcy claims. Element was deprecated because of low usage. 2016-01-31
Banks, Trust and Insurance, Equities [Member] This item represents investments by the reporting entity in equity securities issued by a bank, a trust or an insurance company.    
Basic Earnings Per Share Adjustment, Pro Forma Pro Forma Basic Earnings Per Share Adjustment to reconcile between Net Income and Pro Forma.    
Basic Earnings Per Share, Pro Forma Pro forma basic earnings per share or earnings per unit, which is commonly presented in initial public offerings based on the terms of the offering.    
Basis Swap [Member] Interest-rate swap contract where both rates are variable but are tied to different index rates. For example, but not limited to, one party's rate indexed to three-month London Interbank Offered Rate (LIBOR) while the other party's rate is indexed to six-month LIBOR.    
Basis for Determining Classes of Servicing Assets and Servicing Liabilities The fundamental principles used to determine the classes of servicing assets and servicing liabilities.    
Basis for Exemption from Segregation Requirements, Description Disclosure of the criteria basis for exemptions from segregation requirements for cash and securities not subject to segregation requirements of Federal or Other Regulations due to exemptive provisions.    
Basis of Accounting, Policy [Policy Text Block] Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).    
Basis of Financial Statement Presentation in Chapter 11 Description of the basis of the financial statement presentation, including the method for determining value of liabilities subject to compromise, of an entity that has filed for bankruptcy protection under Chapter 11.    
Basis of Presentation and Significant Accounting Policies [Text Block] The entire disclosure for the basis of presentation and significant accounting policies concepts. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).  Accounting policies describe all significant accounting policies of the reporting entity.    
Basis on which Estimate is Made for Value of Leasehold Acreage Describes the basis on which the estimate was made. For example, such estimated values are often based on the market demand for leasehold acreage which, in turn, is based on a number of qualitative factors such as proximity to production. Element was deprecated because the guidance from which this element is derived is no longer applicable. 2018-01-31
Basis of Provision for Refunds under Government Contracts General description as to the uncertainties, their significance, and the basis used in determining the amount of a provision recorded for expected refunds paid during the renegotiation of government contracts.    
Entity-Wide Disclosure on Geographic Areas, Basis for Attributing Revenue to Countries Basis for attributing revenues from external customers to individual countries.    
Basis of Accounting [Text Block] The entire disclosure for the basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).    
Beneficial Owner [Member] Any person who, directly or indirectly, through any contract, arrangement, understanding, relationship, or otherwise has shares of the entity with 1) voting power which includes the power to vote, or to direct the voting of, such security, and/or 2) investment power which includes the power to dispose, or to direct the disposition of, such security.    
Beneficial Interest Liability Obligation reflecting another party's right to economic interests in another entity or trust under a contractual right. For example, an investor may purchase a beneficial interest in a securitization transaction.    
Beneficial Interest, Secured by Prepayable Financial Instruments, Last-of-Layer, Amortized Cost Amortized cost of beneficial interest secured by prepayable financial instrument, used to designate hedging relationship in which hedged item is last layer expected to be remaining at end of hedging relationship.    
Benefits, Losses and Expenses [Abstract]      
Benefits, Losses and Expenses The total amount of expense recognized during the period for future policy benefits, claims and claims adjustment costs, and for selling, general and administrative costs.    
Billed Contracts Receivable Amounts due for billed services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the Company and, at a minimum, one other party. An example would be amounts billed to customers under contracts or programs but not paid as of the balance sheet date.    
Billed Revenues [Member] Billed amounts due for services rendered or products shipped. This element is distinct from Billed contracts receivables because this is based on noncontract transactions.    
Billed and Unbilled Contract Claims Subject to Uncertainty [Abstract]      
Billings in Excess of Cost [Abstract]      
Billings in Excess of Cost, Noncurrent Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method that are expected to be realized more than one year or one operating cycle, whichever is longer, from the reporting date.    
Billings in Excess of Cost Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method.    
Billings in Excess of Cost, Current Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method that are expected to be realized within one year or one operating cycle, whichever is longer, from the reporting date.    
Binder Costs Cost of binder, a material used to bind aggregates, used during the reporting period. Usually bitumen and bitumen blends. Element was deprecated because of low usage. 2016-01-31
Binder Sales Revenue Revenue from sale of binder, a material used to bind bitumen or aggregates. One use of binders is as a component of hot rolled asphalt roadways. Element was deprecated because of low usage. 2016-01-31
Board of Directors Chairman [Member] Leader of the entity's board of directors who presides over board meetings and other board activities. The chairman is often the chief executive officer as well, and in such a case would be the entity's highest ranking officer.    
Bond Future [Member] Standardized contract to buy or sell a bond on a specified date at a predetermined price.    
Bond Option [Member] Option contract in which the underlying asset is a bond.    
Bonds [Member] Debt security, in which the authorized issuer owes the holder a debt and is obliged to repay the principal and interest (the coupon).    
Borrowings under Guaranteed Investment Agreements Carrying value as of the balance sheet date of the sum of the obligations to contract holders to provide to them an agreed upon rate of return pursuant to the terms of the underlying contract. These contracts represent lending by the contract holders to the entity in return for a guaranteed (primarily fixed) interest rate until maturity, unless called earlier if the contracts provide that option to the contract holders (usually institutions). There is little or no insurance risk for the entity.    
Borrowings [Member] Obligations to pay to another in accordance with an expressed or implied agreement.    
Breeding and Production Animals [Member] Animals maintained to create offspring or to produce goods to be sold for profit.    
Bridge Loan Short-Term financing which is expected to be paid back relatively quickly, such as by a subsequent longer-term loan. Also called swing loan or bridge financing.    
Bridge Loan [Member] Financing which is expected to be replaced by a medium to long-term loan. The loan "bridges" the gap in time when otherwise no financing would be in place.    
Broker Dealer Liabilities [Abstract]      
Broker Dealer, Securities Owned Not Readily Marketable, at Estimated Fair Value Total amount of debt instruments issued by a government or entity guaranteeing payment of the original investment plus interest by a specified future date, corporate stocks (common, preferred), representing ownership rights in an entity or other legal entity, and stock options, warrants, and any other financial instrument which represents or provides the ability to obtain ownership rights in an Entity or other legal entity which financial instruments are not readily marketable for reasons including, but not necessarily limited to: (a) no market on a securities exchange or no independent publicly quoted market; (b) not able to be publicly offered for sale or sold unless a registration has been effected under existing securities laws; or (c) not able to be offered for sale or sold because of other arrangements, restrictions, or conditions applicable to the securities or to the broker-dealer. Element was deprecated because of low usage. 2016-01-31
Brokerage Commissions Revenue Amount of commission revenue from buying and selling securities on behalf of customers.    
Brokered Natural Gas Margin Costs Costs incurred in brokering natural gas, a result of buying and selling natural gas in back-to-back transactions, during the reporting period. Element was deprecated due to remodeling of topic area. 2018-01-31
Brokered Natural Gas Margin Revenue Revenue related to brokering natural gas. The entity realizes brokered margin as a result of buying and selling natural gas in back-to-back transactions. Element was deprecated due to remodeling of topic area. 2018-01-31
Brokers and Dealers Disclosure [Text Block] The entire disclosure for financial services, specifically for brokers and dealers, for the accounting period and at the balance sheet date. Disclosure may include amounts receivable from and payable to broker-dealers and clearing organizations, including securities failed to receive, deposits received for securities loaned, amounts payable to clearing organizations related to open transactions, floor brokerage payables and payables for commodities futures accounts liquidating to an equity balance on a broker-dealer's records. May also include disclosure on company's consolidation policy and a note indicating the amount of the broker-dealer's actual net capital and the amount of required net capital.    
Brokers and Dealers [Abstract]      
Building and Building Improvements [Member] Facility held for productive use including, but not limited to, office, production, storage and distribution facilities and any addition, improvement, or renovation to the structure, for example, but not limited to, interior masonry, interior flooring, electrical, and plumbing.    
Building Improvements [Member] Addition, improvement, or renovation to a facility held for productive use including, but not limited to, office, production, storage and distribution facilities.    
Building [Member] Facility held for productive use including, but not limited to, office, production, storage and distribution facilities.    
Buildings and Improvements, Gross Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.    
Business Combination, Contingent Consideration Liability, Type [Extensible List] Indicates type of contingent consideration liability from business combination.    
Business Combination, Separately Recognized Transactions [Table Text Block] Tabular disclosure of transactions that are recognized separately from the acquisition of assets and assumptions of liabilities in the business combination.    
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination Fair value at acquisition-date of the assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interests issued by the acquirer, including but not limited to,  instruments or interests issued or issuable in consideration for the business combination.    
Business Combination, Separately Recognized Transactions [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.    
Business Combination, Contingent Consideration, Liability, Valuation Technique [Extensible List] Indicates valuation technique for measuring business combination contingent consideration liability.    
Business Description and Basis of Presentation [Text Block] The entire disclosure for the business description and basis of presentation concepts.  Business description describes the nature and type of organization including but not limited to organizational structure as may be applicable to holding companies, parent and subsidiary relationships, business divisions, business units, business segments, affiliates and information about significant ownership of the reporting entity.  Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).    
Business Combination, Contingent Consideration, Liability, Measurement Input Value of input used to measure contingent consideration liability from business combination.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Equipment Amount of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment, acquired at the acquisition date.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities [Abstract]      
Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table Text Block] Tabular disclosure of the nature and amount of any material, nonrecurring adjustments directly attributable to the business combination(s) included in the reported pro forma revenue and earnings (supplemental pro forma information).    
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.    
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Asset Amount of increase (decrease) in the value of right to a contingent consideration asset.    
Business Acquisition, Date of Acquisition Agreement Date when the business acquisition agreement was executed, in CCYY-MM-DD format.    
Business Combination, Contingent Consideration, Liability, Change in Valuation Technique, Reason [Extensible List] Indicates reason valuation technique or approach changed for measuring business combination contingent consideration liability.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Amount of intangible assets, excluding goodwill, acquired at the acquisition date.    
Business Combination, Separately Recognized Transactions, Expenses and Losses Recognized The expenses and losses recorded for each transaction with the acquiree that was recognized separately from the acquisition of assets and assumptions of liabilities in the business combination.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities Amount of investments in debt and equity securities, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.    
Business Combination, Separately Recognized Transactions [Table] Schedule detailing the disclosures related to transactions that are recognized separately from the acquisition of assets and assumptions of liabilities in the business combination by type of transaction.    
Business Combination, Separately Recognized Transactions, Assets Recognized The assets recognized for each amount of assets recorded in a transaction with the acquiree that is recognized separately from the acquisition of assets and assumptions of liabilities in the business combination.    
Business Combination, Separately Recognized Transactions, Liabilities Recognized The amount of liabilities recognized recorded in a transaction with the acquiree for each transaction that is recognized separately from the acquisition of assets and assumptions of liabilities in the business combination.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]      
Business Combination, Contingent Consideration, Liability, Fair Value by Fair Value Hierarchy Level [Extensible List] Indicates level within fair value hierarchy of contingent consideration liability from business combination.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets [Abstract]      
Business Combination, Separately Recognized Transactions [Axis] Disclosures related to transactions that are recognized separately from the acquisition of assets and assumptions of liabilities in the business combination by type of transaction.    
Business Insurance Recoveries [Text Block] The entire disclosure for business interruption insurance recoveries. Includes, but is not limited to, the nature of the event resulting in business interruption losses, amount of business interruption insurance recoveries recognized, and line item in the statement of income in which those recoveries are classified.    
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Amount of assets acquired at the acquisition date.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Capital Lease Obligation Amount of capital lease obligation, assumed at the acquisition date.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment [Abstract]      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt Amount of long-term debt due after one year or the normal operating cycle, if longer, assumed at the acquisition date.    
Business Acquisition, Effective Date of Acquisition Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.    
Business Combination, Separately Recognized Transactions, Settlement of Preexisting Relationship, Method Description of method used to determine settlement amount of preexisting relationship for each transaction recognized separately from acquisition of asset and assumption of liability in business combination.    
Business Combination, Acquired Sales-type Lease Receivable Amount of acquired sales-type lease receivable from business combination.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets Amount of assets, excluding financial assets and goodwill, that lack physical substance, having a projected indefinite period of benefit, acquired at the acquisition date.    
Business Combination, Contingent Consideration, Liability, Noncurrent Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled beyond one year or the normal operating cycle, if longer.    
Business Combination, Segment Allocation [Table Text Block] Tabular disclosure of goodwill in a business combination.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt Amount of long-term debt due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.    
Business Combination, Contingent Consideration, Liability, Current Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets Amount of assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land Amount of real estate acquired, at the acquisition date.    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments Related to Previous Period Amount of increase (decrease) in income that would have been recognized in previous periods if the adjustments to provisional amounts were recognized as of the acquisition date.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]      
Business Acquisition, Period Results Included in Combined Entity Period when results of operations of the acquired entity are included in the income statement of the combined entity, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.    
Business Acquisition, Share Price Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.    
Business Exit Costs Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.    
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Loss In a business combination achieved in stages, this element represents the amount of loss recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent Amount, after allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences and carryforwards acquired at the acquisition date, classified as noncurrent.    
Business Combination, Contingent Consideration, Liability, Change in Valuation Technique [true false] Indicates (true false) whether valuation technique or approach changed for measuring business combination contingent consideration liability.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Current Amount of deferred tax liability attributable to taxable temporary difference assumed at the acquisition date that are classified as current.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]      
Business Interruption Loss [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Business Combination, Contingent Consideration, Asset, Noncurrent Amount of asset recognized arising from contingent consideration in a business combination, expected to be realized beyond one year or the normal operating cycle, if longer.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Amount of other assets expected to be realized or consumed before one year or the normal operating cycle, if longer, acquired at the acquisition date.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities [Abstract]      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue Amount of deferred revenue expected to be recognized as such within one year or the normal operating cycle, if longer, assumed at the acquisition date.    
Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table] Schedule of the nature and amount of any material, nonrecurring adjustments directly attributable to the business combination(s) included in the reported pro forma revenue and earnings (supplemental pro forma information).    
Business Combination, Step Acquisition, Equity Interest in Acquiree, Valuation Techniques In a business combination achieved in stages, description of the valuation technique(s) used to measure the acquisition date fair value of the equity interest in the acquiree held by the acquirer immediately before the business combination and information that enables users of the acquirer's financial statements to assess the inputs used to develop the fair value measurement of the equity interest in the acquiree held by the acquirer immediately before the business combination.    
Business Combination, Separately Recognized Transactions, Revenues and Gains Recognized The revenues and gains recognized recorded for each transaction with the acquiree that is recognized separately from the acquisition of assets and assumptions of liabilities in the business combination.    
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (Loss), Net [Abstract]      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities Amount of liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date.    
Business Combination Segment Allocation [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Business Combination, Consideration Transferred, Other Amount of tangible or intangible assets, including a business or subsidiary of the acquirer transferred by the entity to the former owners of the acquiree. Excludes cash.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets Amount of assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.    
Business Combination, Consideration Transferred Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets [Abstract]      
Business Combination, Consideration Transferred, Liabilities Incurred Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings Amount of facility held for productive use including, but not limited to, office, production, storage and distribution facilities, acquired at the acquisition date.    
Business Combination, Contingent Consideration, Liability Amount of liability recognized arising from contingent consideration in a business combination.    
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value Fair value at acquisition-date of the equity interest in the acquiree held by the acquirer, immediately before the acquisition date for businesses combined in stages.    
Business Combination, Contingent Consideration, Asset Amount of asset recognized arising from contingent consideration in a business combination.    
Business Combination, Contingent Consideration, Liability, Measurement Input [Extensible List] Indicates measurement input for business combination contingent consideration liability.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Amount of other liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.    
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.    
Business Combination, Contingent Consideration, Asset, Current Amount of asset recognized arising from contingent consideration in a business combination, expected to be realized within one year or the normal operating cycle, if longer.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Amount of deferred tax liability attributable to taxable temporary differences assumed at the acquisition date.    
Business Combination, Contingent Consideration, Asset [Abstract]      
Business Combination, Contingent Consideration, Liability [Abstract]      
Business Combination, Separately Recognized Transactions [Domain] Type of transaction that is recognized separately from the acquisition of assets and assumptions of liabilities in a business combination by transaction.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Amount of liabilities assumed at the acquisition date.    
Business Combination, Separately Recognized Transactions, Description A description of each transaction that is recognized separately from the acquisition of assets and assumptions of liabilities in the business combination.    
Business Combination, Segment Allocation [Table] Disclosure of information about goodwill in a business combination.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets, Current Amount, after allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences and carryforwards acquired at the acquisition date, classified as current.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Amount of other liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date.    
Business Combination, Goodwill [Abstract]      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent Amount of deferred tax liability attributable to taxable temporary difference assumed at the acquisition date that are classified as noncurrent.    
Business Interruption Loss [Axis] Information by business interruption loss.    
Business Combination, Acquired Direct Financing Lease Receivable Amount of acquired direct financing lease receivable from business combination.    
Business Interruption Loss [Domain] Type or name of business interruption loss.    
Business Combination, Step Acquisition, Equity Interest in Acquiree, Including Subsequent Acquisition, Percentage Percentage of voting equity interests acquired in a business combination achieved in stages, including equity interests in the acquiree held by the acquirer immediately before the acquisition date and acquired at the acquisition date.    
Business Description and Accounting Policies [Text Block] The entire disclosure for the business description and accounting policies concepts.  Business description describes the nature and type of organization including but not limited to organizational structure as may be applicable to holding companies, parent and subsidiary relationships, business divisions, business units, business segments, affiliates and information about significant ownership of the reporting entity. Accounting policies describe all significant accounting policies of the reporting entity.    
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Amount of deferred tax asset attributable to deductible temporary differences and carryforwards acquired at the acquisition date.    
Business Combination, Separately Recognized Transactions, Net Gains and Losses The net gains or losses recognized for each transaction with the acquiree that was recognized separately from the acquisition of assets and assumptions of liabilities in the business combination.    
Business Combination, Assets and Liabilities Arising from Contingencies, Amount Recognized, Other than at Fair Value, Net [Abstract]      
Business Acquisition, Pro Forma Information [Abstract]      
Business Combination, Separately Recognized Transactions [Abstract]      
Business Combination, Integration Related Costs Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.    
Business Acquisition, Integration, Restructuring and Other Related Costs [Text Block] The entire description for costs incurred to effect a business combination that have been expensed during the period.  Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.    
Business Acquisition, Transaction Costs Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.    
Business Acquisition, Pro Forma Information, Description Description of the pro forma information, nature of adjustments made to historical information to arrive at pro forma amounts, amounts excluded from pro forma information, any material-nonrecurring items included in the pro forma information and limitations of pro forma disclosures.    
Business Acquisition, Equity Interest Issued or Issuable, Basis for Determining Value Basis for determining value of equity interest issued or issuable to acquire the entity.    
Business Combination, Liabilities Arising from Contingencies, Amount Recognized The amount, measured at acquisition-date fair value, of all liabilities assumed that arise from contingencies and were recognized by the entity.    
Business Combination, Assets Arising from Contingencies, Amount Recognized, Other than at Fair Value The amount, measured at other than acquisition-date fair value, of all the assets acquired that arise from contingencies and were recognized by the entity, if the acquisition-date fair value cannot be determined and other criteria (as defined) related to the contingencies have been met.    
Business and Contractual Arrangements for Prepaid Health Care Service Providers [Text Block] The entire disclosure for prepaid health care service provider's significant business and contractual arrangements with hospitals, physicians, or other associated entities.    
Business Combination, Separately Recognized Transactions, Accounting Method A description of the accounting for each transaction that is recognized separately from the acquisition of assets and assumptions of liabilities in the business combination.    
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax, Per Share, Basic Per basic share amount of pro forma income from continuing operations, after tax, as if the business combination had been completed at the beginning of a period.    
Business Combination, Liabilities Arising from Contingencies, Amount Recognized, Other than at Fair Value The amount, measured at other than acquisition-date fair value, of all the liabilities assumed that arise from contingencies and were recognized by the entity, if the acquisition-date fair value cannot be determined and other criteria (as defined) related to the contingencies have been met.    
Business Acquisition, Pro Forma Net Income (Loss) The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.    
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity.    
Business Acquisition, Pro Forma Information [Table Text Block] Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate.    
Business Acquisition, Preacquisition Contingency, Amount of Settlement Amount paid or received to resolve the preacquisition contingency.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Restructuring Liabilities This item represents liabilities associated with restructuring or exit activities of the acquiree, existing at the acquisition date (present liabilities of the acquiree).    
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax Amount after tax of pro forma income from continuing operations as if the business combination had been completed at the beginning of a period.    
Business Acquisition, Contingent Consideration [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Business Acquisition, Pro Forma Earnings Per Share, Basic The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.    
Business Acquisition, Equity Interests Issued or Issuable [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Business Acquisition, Pro Forma Earnings Per Share, Diluted The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.    
Business Combination, Assets Arising from Contingencies, Amount Recognized The amount, measured at acquisition-date fair value, of all the assets acquired that arise from contingencies and were recognized by the entity.    
Business Acquisition [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Business Acquisition, Acquiree [Domain] Identification of the acquiree in a material business combination (or series of individually immaterial business combinations), which may include the name or other type of identification of the acquiree.    
Business Acquisition, Pro Forma Revenue The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.    
Business Acquisition, Description of Acquired Entity With respect to a business combination completed during the period, this element provides a description of the business, other than the name, which may include the industry, size, products and other important information.    
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Number of shares of equity interests issued or issuable to acquire entity.    
Business Acquisition, Name of Acquired Entity Name of the acquired entity.    
Business Acquisition [Axis] Information by business combination or series of individually immaterial business combinations.    
Business Combination, Assets and Liabilities Arising from Contingencies, Amount Recognized, Net [Abstract]      
Business Combinations [Abstract]      
Business Combination, Assets and Liabilities Arising from Contingencies, Amount Recognized, Other than at Fair Value, Net The net amount, measured at other than acquisition-date fair value, of all the assets acquired and liabilities assumed that arise from contingencies and were recognized by the entity, if the acquisition-date fair value cannot be determined and other criteria (as defined) related to the contingencies have been met.    
Business Acquisition, Equity Interest Issued or Issuable, Description Description of equity interests issued or issuable to acquire the entity.    
Business Acquisition, Date of Acquisition [Abstract]      
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax, Per Share, Diluted Per diluted share amount of pro forma income from continuing operations, after tax, as if the business combination had been completed at the beginning of a period.    
Business Acquisition, Percentage of Voting Interests Acquired Percentage of voting equity interests acquired at the acquisition date in the business combination.    
Business Combination, Indemnification Assets, Amount as of Acquisition Date The amount of indemnification assets (amounts to be reimbursed if and when certain assumed liabilities are paid) recognized at the acquisition date of a business combination.    
Business Acquisition, Planned Restructuring Activities, Description Description of restructuring activities for an acquired entity, including the amount of acquisition costs allocated to restructuring activities, and the period in which such costs will be incurred. The type of major actions that comprise the plan to exit an activity or involuntarily terminate employees of the acquired entity including activities of the acquired entity that will not continue, method of disposition, and description of employee groups that will be terminated.  If the entity has not finalized plans for the restructuring activities, a description of the unresolved issues, the types of additional liabilities that might arise, and how any adjustment would be reported in the financial statements.  Disclosure may also include timeframe when the registrant began formulating exit plans for which accrual may be necessary, and the types and amounts of liabilities included in the acquisition cost allocation. Disclosure may include the nature and amount of losses relating to asset impairments from the exit or disposal activity.    
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period Total revenue reported by the acquired entity for its previous full fiscal year before the business acquisition.    
Business Combinations Policy [Policy Text Block] Disclosure of accounting policy for completed business combinations (purchase method, acquisition method or combination of entities under common control). This accounting policy may include a general discussion of the purchase method or acquisition method of accounting (including for example, the treatment accorded contingent consideration, the identification of assets and liabilities, the purchase price allocation process, how the fair values of acquired assets and liabilities are determined) and the entity's specific application thereof. An entity that acquires another entity in a leveraged buyout transaction generally discloses the accounting policy followed by the acquiring entity in determining the basis used to value its interest in the acquired entity, and the rationale for that accounting policy.    
Business Acquisition, Standard Industrial Classification (SIC Code) for Acquired Entity SEC Standard Industrial Classification code for the acquired entity. Element was deprecated because of low usage. 2016-01-31
Business Combination Disclosure [Text Block] The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).    
Business Interruption Losses, Nature of Event A description of the event that resulted in a business interruption loss.    
Business Acquisitions, Purchase Price Allocation, Year of Acquisition, Net Effect on Income The net effect on income before taxes of the amortization and accretion of premiums, discounts and intangible assets in the year of acquisition, when the assets of the acquired institution exceed 10 percent of the consolidated assets at the end of the most recent period.    
Business Combinations and Other Purchase of Business Transactions, Policy [Policy Text Block] Disclosure of accounting policy for business combinations and other business acquisition transactions not accounted for using the purchase method, such as an exchange of shares between entities under common control.    
Business Acquisitions, Purchase Price Allocation, Year of Acquisition, Description In the year of acquisition, if the assets of the acquired institution exceed 10 percent of the consolidated assets at the end of the most recent period, describes the amounts of discounts and premiums for fair market value adjustments, methods of amortization (accretion), and estimated remaining lives.    
Business Combinations, Bank Presentation [Abstract]      
Business Acquisitions, Purchase Price Allocation, Subsequent Years, Net Effect on Income The net effect on income before taxes of the amortization and accretion of premiums, discounts and intangible assets in years subsequent to the year of acquisition, when the total amounts of remaining discounts, premiums, and intangible assets exceed 30 percent of stockholders' equity. Element was deprecated because of low usage. 2016-01-31
Business Acquisitions, Purchase Price Allocation, Subsequent Years, Remaining Adjustments Total remaining unamortized or unaccreted amounts of premiums, discounts, and intangible assets, in years subsequent to the year of acquisition, when the total amounts of remaining discounts, premiums, and intangible assets exceed 30 percent of stockholders' equity.    
Business Acquisition, Goodwill, Expected Tax Deductible Amount The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.    
Business Development Business development involves the development of products and services, their delivery, design and their implementation. Business development includes a number of techniques designed to grow an economic enterprise. Such techniques include, but are not limited to, assessments of marketing opportunities and target markets, intelligence gathering on customers and competitors, generating leads for possible sales, follow-up sales activity, formal proposal writing and business model design. Business development involves evaluating a business and then realizing its full potential, using such tools as marketing, sales, information management and customer service.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contingent Liability The amount of liability arising from an inherited contingency (as defined) which has been recognized as of the acquisition date.    
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (Loss), Net In a business combination achieved in stages, this element represents the amount of net gain (loss) recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.    
Business Combination, Separately Recognized Transactions, Additional Disclosures, Issuance Costs Not Expensed For transactions that are recognized separately from the acquisition of assets and assumptions of liabilities in the business combination, such as related to pre-existing relationships with the acquiree, this element represents the disclosure of the amount of any issuance related costs which have not been expensed.    
Business Combination, Separately recognized Transactions, Additional Disclosures [Abstract]      
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Inestimable For contingent consideration arrangements recognized in connection with a business combination, if a range (undiscounted) of potential outcomes cannot be estimated, this element represents a statement of that fact and the reasons why a range cannot be estimated.    
Business Combination, Bargain Purchase, Gain Recognized, Description In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents a description of the reasons why the transaction resulted in a gain.    
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest [Abstract]      
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.    
Business Combination, Pro Forma Information, Incomplete Initial Accounting This element represents a description of which of the acquiree revenue and earnings, since the date of acquisition which have been included in the income statement of the period, or any of the required pro forma disclosure information disclosures could not be made and the reason why they could not be made, if the acquisition date of a business combination is after the reporting date but before the financial statements are issued.    
Business Combination, Acquired Receivables [Abstract]      
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to inventory acquired in connection with a business combination for which the initial accounting was incomplete.    
Business Combination, Provisional Information [Abstract]      
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.    
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed For transactions that are recognized separately from the acquisition of assets and assumptions of liabilities in the business combination, such as related to pre-existing relationships with the acquiree, this element represents the disclosure of the amount of acquisition related costs which have been expensed.    
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low For contingent consideration arrangements and indemnification assets recognized in connection with a business combination, this element represents an estimate of the low-end of the potential range (undiscounted) of the consideration which may be paid.    
Business Combination, Assets and Liabilities Arising from Contingencies [Abstract]      
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.    
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed, Financial Statement Caption For transactions that are recognized separately from the acquisition of assets and assumptions of liabilities in the business combination, such as related to pre-existing relationships with the acquiree, this element represents disclosure of the line item or line items in the income statement in which the acquisition related costs which have been expensed are recognized.    
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Fair Value Method The method of determining the fair value of the equity interests of the acquirer, including the number of instruments or interests issued or issuable in consideration for the business combination.    
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (Loss), Financial Statement Caption In a business combination achieved in stages, this element represents the income statement line item in which the amount of gain (loss) recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination is included.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.    
Business Combination, Provisional Information, Initial Accounting Incomplete, Reasons This element represents a description of the reasons why the initial accounting is incomplete for those particular assets, liabilities, noncontrolling interests, or items of consideration for which the amounts recognized in the financial statements have been determined only provisionally.    
Business Combination, Bargain Purchase, Gain Recognized, Amount In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity.    
Business Combination, Reason for Business Combination This element represents a description of the primary reason for the business combination which may consist of general categories such as top-line growth, synergistic benefits, market share, and diversification and the more detailed factors that might apply.    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to financial assets acquired in connection with a business combination for which the initial accounting was incomplete.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Assets The amount of financial assets (as defined) recognized as of the acquisition date.    
SEC Schedule, 12-09, Reserve, Business Restructuring [Member] Reserve for expected cost from exit or disposal obligation excluding cost pertaining to entity newly acquired in business combination and asset retirement obligation. Includes, but is not limited to, cost for one-time termination benefit, termination of contract, and consolidating or closing facility.    
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Costs For transactions that are recognized separately from the acquisition of assets and assumptions of liabilities in the business combination, such as related to pre-existing relationships with the acquiree, this element represents the disclosure of the amount of acquisition related costs.    
Business Combination, Acquired Receivable, Fair Value Fair value of acquired receivable from business combination, excluding certain loans and debt securities acquired in transfer.    
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Significant Inputs This item represents the significant inputs, including any assumptions, used by management to estimate the fair value of the noncontrolling interest in the acquiree at the acquisition date.    
Business Combination, Consideration Transferred [Abstract]      
Business Combination, Step Acquisition [Abstract]      
Business Combination, Description [Abstract]      
Business Combination, Provisional Information, Initial Accounting Incomplete, Nature of Adjustments This element represents a description of the nature of any measurement period adjustments (as defined) realized during the reporting period to the assets, liabilities, equity interests, or items of consideration for which the initial accounting was incomplete in connection with a business combination.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory The amount of inventory recognized as of the acquisition date.    
Business Combination, Pro Forma Information, Disclosure Impracticable If disclosure of the acquiree revenue and earnings since the date of acquisition which have been included in the income statement of the period or any of the required pro forma disclosure information required is impracticable, the element represents disclosure of that fact and an explanation of why the disclosure is impracticable (as defined).    
Business Combination, Acquired Receivables, Estimated Uncollectible For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the best estimate at the acquisition date of the contractual cash flows not expected to be collected, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables.    
Business Combination, Separately Recognized Transactions, Additional Disclosures, Issuance Costs Not Expensed, Financial Statement Caption For transactions that are recognized separately from the acquisition of assets and assumptions of liabilities in the business combination, such as related to pre-existing relationships with the acquiree, this element represents disclosure of the line item or line items in the financial statements in which the amount of any issuance related costs which have not been expensed are recognized including, as appropriate, the accounting treatment applied.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment The amount of property, plant, and equipment recognized as of the acquisition date.    
Business Combination, Contingent Consideration Arrangements, Description For contingent consideration arrangements recognized in connection with a business combination, this element represents a description of such arrangements.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities The amount of financial liabilities assumed (as defined) which have been recognized as of the acquisition date.    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles The amount of identifiable intangible assets recognized as of the acquisition date.    
Business Combination, Provisional Information, Initial Accounting Incomplete, Items This element represents a statement of which of the assets, liabilities, equity interests, recognized in the financial statements or items of consideration transferred for which the initial accounting is incomplete in connection with a business combination occurring during the period.    
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Maximum Unlimited For contingent consideration arrangements recognized in connection with a business combination, if the maximum (undiscounted) potential outcome is limitless, this element represents a statement of that fact.    
Business Combination, Acquired Receivables, Gross Contractual Amount For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the gross contractual amounts receivable, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables.    
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Valuation Technique This item represents management's methodology (for example, procedures or techniques) for estimating the fair value of the noncontrolling interest in the acquiree at the acquisition date.    
Business Combination, Contingent Consideration Arrangements, Basis for Amount For contingent consideration arrangements recognized in connection with a business combination, this element represents a description of the basis for determining the amount of the payment recorded.    
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value This element represents the fair value of the noncontrolling interest in the acquiree at the acquisition date.    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]      
Business Combination, Bargain Purchase [Abstract]      
Business Combination, Goodwill Recognized, Description This element represents a qualitative description of the factors that make up the goodwill recognized in a business combination, such as expected synergies by the entity to be derived from combining operations of the acquiree, intangible assets that do not qualify for separate recognition, and such other factors as may apply.    
Business Combination, Assets and Liabilities Arising from Contingencies, Amount Recognized, Net The net amount, measured at acquisition-date fair value, of all the assets acquired and liabilities assumed that arise from contingencies and were recognized by the entity.    
Business Combination, Segment Reporting, Assignment of Goodwill Not Complete This element represents disclosure of the fact that the required assignment of goodwill to reporting units has not been completed as of the date the financial statements are issued.  The amount of goodwill assigned to reportable segments is included with the segment reporting disclosure in the taxonomy.    
Business Combination, Control Obtained Description This element represents a description of how the entity obtained control of the acquired entity.    
Business Combination, Assets and Liabilities Arising from Contingencies, Description This element represents a description of the nature of contingencies, both unrecognized and recognized, which have given rise to assets acquired and liabilities assumed at the acquisition date.    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to property, plant, and equipment acquired in connection with a business combination for which the initial accounting was incomplete.    
Business Combination, Acquisition Related Costs This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to items of consideration transferred in connection with a business combination for which the initial accounting was incomplete.    
Business Combination, Indemnification Assets, Range of Outcomes, Maximum Unlimited For indemnification assets recognized in connection with a business combination, if the maximum (undiscounted) potential outcome is limitless, this element represents a statement of that fact.    
Business Combination, Contingent Consideration Arrangements [Abstract]      
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to intangibles acquired in connection with a business combination for which the initial accounting was incomplete.    
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Reasons This element represents a description of the reasons causing an amount of any change recognized during the period in the estimated range of outcomes (undiscounted) of a liability assumed in a business combination arising from an item of contingent consideration.    
Business Combination, Acquired Receivables, Description This element represents a narrative description of the nature of receivables acquired in a business combination (as defined) including the nature of the receivables (such as loans, capital leases), the fair value of the acquired receivables, the gross contractual amount to be collected, and the amount estimated to be doubtful of collection, if any.    
Business Combination, Indemnification Assets, Description For indemnification assets recognized in connection with a business combination, this element represents a description of such assets.    
Business Combination, Indemnification Assets, Range of Outcomes, Value, Low For indemnification assets recognized in connection with a business combination, this element represents an estimate of the low-end of the potential range (undiscounted) of the indemnification benefit which may be realized.    
Business Combination, Indemnification Assets, Basis for Amount For indemnification assets recognized in connection with a business combination, this element represents a description of the basis for determining the amount of the asset recorded.    
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Valuation Technique This item represents management's methodology (for example, procedures or techniques) for estimating the range of outcomes for a liability assumed in a business combination arising from an item of contingent consideration for which a change in the range of outcomes has been recognized during the reporting period. Element was deprecated due to remodeling of topic area. 2018-01-31
Business Combination, Indemnification Assets [Abstract]      
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to financial liabilities assumed in connection with a business combination for which the initial accounting was incomplete.    
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High This element represents the amount of any change recognized during the period in the high-end of the estimated range of outcomes (undiscounted) of a liability assumed in a business combination arising from an item of contingent consideration.    
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination.    
Business Combination, Step Acquisition, Equity Interest in Acquiree, Description In a business combination achieved in stages, this element represents a narrative description of the history, developments, or effect of the acquisition relative to the percentage of equity in the acquiree held by the acquirer immediately before the acquisition date. Such description may describe any gain recognized as a result of the acquisition.    
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Significant Inputs This item represents the significant inputs, including any assumptions, used by management to estimate the range of outcomes for a contingent liability assumed in a business combination for which a change in the range of outcomes has been recognized during the reporting period. Element was deprecated due to remodeling of topic area. 2018-01-31
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest Amount recognized as of the acquisition date for the assets, including goodwill, in excess of (less than) the aggregate liabilities assumed, less the noncontrolling interest in the acquiree.    
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, Low This element represents the amount of any change recognized during the period in the low-end of the estimated range of outcomes (undiscounted) of a liability assumed in a business combination arising from an item of contingent consideration.    
Business Combination, Indemnification Assets, Range of Outcomes, Inestimable For indemnification assets recognized in connection with a business combination, if a range (undiscounted) of potential outcomes cannot be estimated, this element represents a statement of that fact and the reasons why a range cannot be estimated.    
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]      
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Equity Interests This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to equity interests acquired in connection with a business combination for which the initial accounting was incomplete.    
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract]      
Business Combination, Indemnification Assets, Range of Outcomes, Value, High For indemnification assets recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the indemnification benefit which may be realized.    
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration [Abstract]      
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.    
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination [Abstract]      
Correspondent Clearing [Member] Security clearing, custody, deposit, fund transfer and settlement provided by financial institution for another financial institution.    
Calculated under Revenue Guidance in Effect before Topic 606 [Member] Calculated under guidance for revenue recognition in effect prior to change to new guidance for revenue from contract with customer when using transition method for cumulative effect in period including initial date of application.    
Consideration Received for Beneficial Interest Obtained for Transferring Financial Asset Amount of beneficial interest received as consideration for transferring noncash financial asset. Includes, but is not limited to, trade receivable in securitization transaction.    
Claims Development [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Criticized [Member] Credit rating classification which identifies weaknesses related to credit risk. Includes, but is not limited to, special mention, substandard and doubtful classifications. Excludes noncriticized classification.    
Cayman Islands Tax Information Authority [Member] Designated tax department of the government of the Cayman Islands.    
Canada Revenue Agency [Member] Designated tax department of the government of Canada.    
California Franchise Tax Board [Member] Designated tax department of the government of the state of California.    
Combined Ratio Ratio of non-life losses and loss expenses, non-life acquisition expenses and non-life general and administrative expenses, to non-life net premiums earned.    
Committee for Uniform Securities Identification Procedures (CUSIP) Nine character alphanumeric identifier of an entity or issuer and the type of security.    
Report Date [Axis] Information about two or more restatements of a single financial reporting concept where restated amounts have been reported in a prior filing.    
Contractors [Abstract]      
Continuing Care Retirement Communities, Advance Fees, Policy [Policy Text Block] Disclosure of accounting policy for calculating advance fees which may include the entity's policy for (1) calculating the liability for the obligation to provide future services, (2) their refund policy for refundable fees, (3) the  method of amortization of the liability for entrance fees that are refundable, and (4) the basis and method of amortization of deferred revenue related to entrance fees that are refundable if the contract holder's unit is reoccupied. Alternate captions include entrance fees and entrance fees and membership fees earned and cancellation penalties.    
Continuing Care Retirement Communities, Refund Obligation Amount of refund obligation under existing contract for continuing care retirement community.    
Continuing Care Retirement Communities, Obligation for Future Service, Amount Present value of liability to provide future service and use of facility related to continuing-care contract.    
Continuing Care Retirement Communities, Advance Fees, Refunds The cash paid during the period for refunds related to advance fees. Alternate captions include entrance fees and refundable entrance fees.    
Continuing Involvement with Transferred Financial Assets, Principal Amount Outstanding Principal amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets.    
Continuing Care Retirement Communities, Obligation for Future Service, Interest Rate Interest rate used to discount liability to provide future service related to continuing-care contract.    
Continuing Care Retirement Communities, Obligations, Policy [Policy Text Block] Disclosure of accounting policy for transactions within the continuing care retirement community which may include (1) the nature of related continuing-care contracts, (2) the carrying amount of the liability to provide future services and the use of facilities presented at present value in the financial statements (if not separately disclosed), (3) the interest rate to discount that liability, (4) the statutory escrow or similar requirements, and (5) the refund policy of the continuing care community and the general amount of the refund obligation under the existing contracts. Element was deprecated because it was inappropriately modeled. 2018-01-31
Continuing Care Retirement Communities [Abstract]      
Continuing Care Retirement Communities, Description Description of continuing care retirement community, including nature of continuing-care contract, statutory escrow or similar requirement, and refund policy.    
Congressionally Mandated Federal Home Loan Bank Assessments Amount of expense for Congressionally mandated Federal Home Loan Bank (FHLBank) assessments, for example, but not limited to, Resolution Funding Corporation (REFCORP) assessments.    
Capacity [Member] Ability to manufacture, produce, carry (as in transport), convey, hold, store, or accommodate.    
Corporation [Member] Legal entity in the form of a corporation created to conduct business.    
Cross Currency Interest Rate Contract [Member] Derivative instrument whose primary underlying risk is tied to interest rates and foreign exchange rates.    
Controller [Member] Executive responsible for the entity's accounting activities and is in effect the chief accountant.    
Cost-method Investments, Realized Losses, Excluding Other than Temporary Impairments For investments in debt and equity securities accounted for at cost, the excess of the carrying amount over net sale proceeds of investments disposed of during the period.    
Cost-method Investments, Realized Gain (Loss), Excluding Other than Temporary Impairments This item represents the gain (loss) realized during the period from the sale of investments accounted for under the cost method of accounting.    
Cost-method Investments, Other than Temporary Impairment This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the cost method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.    
Cost-method Investments [Member] Investment in the stock of an investee recognized as cost-method.    
Cost-method Investments, Realized Gain (Loss), Alternative [Abstract]   Element was deprecated. 2018-01-31
Call Option [Member] Financial contract between two parties, the buyer and the seller of the option, where the buyer has the right but not the obligation to buy an agreed quantity of a particular commodity or financial instrument (the underlying instrument) from the seller of the option for a certain price (the strike price). Seller is obligated to sell the asset to the buyer, if the buyer exercises the option.    
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Flight Equipment, Net [Abstract]      
Capital Support Agreement [Member] A Capital Support Agreement provides for cash infusions, to maintain a specific credit rating.    
Capital Leased Assets [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Capital Lease Obligations, Noncurrent Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.    
Capital Requirements on Foreign Financial Institutions [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Capital Leases in Financial Statements of Lessor Disclosure [Text Block] The entire disclosure for lessor's leasing arrangements, which includes direct financing, sales type and leveraged leases. Disclosure may include the effect on the balance sheet and the income statement resulting from a change in lease classification for leases that at inception would have been classified differently had guidance been in effect at the inception of the original lease.    
Capital Requirements on Trust Assets [Text Block] The entire disclosure for capital requirements for trust assets under management.    
Capital Leases, Future Minimum Payments Due in Four and Five Years [Abstract]      
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Flight Equipment, Accumulated Depreciation The cumulative amount of depreciation that has been recognized in the income statement related to long-lived, depreciable flight assets used in the entity's principle business operations, subject to a lease and meeting the criteria for capitalization.    
Capital Leases of Lessor, Contingent Rentals, Description of Variable Rate Basis The reference rate for the variable rate of the lessor's capital lease (sales-type and direct financing leases), such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.    
Capital Leases, Future Minimum Payments Due in Two and Three Years [Abstract]      
Capital Leases of Lessee, Contingent Rentals, Description of Variable Rate Basis The reference rate for the variable rate of the lessee's capital lease, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.    
Capital Leases, Contingent Rental Payments Received For sales-type and direct financing leases, total contingent rentals received during the period.    
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Other Property, Plant, and Equipment, Net Amount after depreciation of leased long-lived, physical assets used to produce goods and services and not intended for resale meeting the criteria for capitalization, classified as other.    
Capital Leases, Future Minimum Payments Receivable, Rolling Year Five Amount of minimum lease payments to be received by the lessor for capital leases in the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Flight Equipment, Net The net amount of long-lived, depreciable flight assets used in the entity's principle business operations, subject to a lease and meeting the criteria for capitalization.    
Capital Lease Obligations [Member] A borrowing recorded for a lease meeting the criteria for capitalization. A lease is defined as an agreement conveying the right to use property, plant, or equipment (land or depreciable assets) usually for a stated period of time.    
Capital Leases, Future Minimum Payments, Remainder of Fiscal Year Amount of minimum lease payments for capital leases due in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Balance Sheet, Assets by Major Class, Net [Abstract]      
Capital Lease Obligations [Abstract]      
Capital Leases, Future Minimum Payments Due Amount of minimum lease payments for capital leases.    
Capital Leases, Future Minimum Payments, Due in Rolling Year Four and Five [Abstract]   Element was deprecated. 2016-01-31
Capital Leased Assets, Number of Units The number of units (items of property) under capital lease arrangements.    
Capital Leases in Financial Statements of Lessee Disclosure [Text Block] The entire disclosure for capital leasing arrangements including, but not limited to, the following: a) the basis on which contingent rental payments are determined; (b) the existence and terms of renewal or purchase options and escalation clauses; (c) restrictions imposed by lease agreements, such as those concerning dividends, additional debt, and further leasing.    
Capital Leases, Future Minimum Payments, Next Rolling Twelve Months Amount of minimum lease payments for capital leases due in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Future Minimum Payments Receivable, Rolling Year Three Amount of minimum lease payments to be received by the lessor for capital leases in the third rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Future Minimum Payments Receivable, Rolling Year Two Amount of minimum lease payments to be received by the lessor for capital leases in the second rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Flight Equipment, Gross Gross amount of long-lived, depreciable flight assets used in the entity's principle business operations, subject to a lease and meeting the criteria for capitalization.    
Capital Leased Assets, Noncurrent, Fair Value Disclosure Fair value portion of the lessor's net investment in nonoperating or leveraged leases expected to be realized or consumed after one year or normal operating cycle, if longer.    
Capital Leases of Lessee [Abstract]      
Capital Leases, Future Minimum Payments Due, Rolling Maturity [Abstract]      
Capital Leases, Future Minimum Payments, Due in Rolling Year Two and Three Amount of minimum lease payments for capital leases due in the second and third rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Element was deprecated because of low usage. 2016-01-31
Capital Leases of Lessee, Contingent Rentals, Basis Spread on Variable Rate The percentage points added to the reference rate to compute the variable rate on the lessee's capital lease.    
Capital Leases, Future Minimum Payments Due in Four and Five Years Amount of minimum lease payments for capital leases due in the fourth and fifth fiscal years following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Future Minimum Payments, Net Minimum Payments Amount of minimum lease payments for capital leases net of executory costs, which include amounts paid by the lessee to the lessor for insurance, maintenance and taxes.    
Capital [Abstract]      
Capital Leases, Future Minimum Payments, Due in Rolling after Year Five Amount of minimum lease payments for capital leases due after the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Future Minimum Payments, Due in Rolling Year Five Amount of minimum lease payments for capital leases due in the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital The amount of total capital as defined in the regulations.    
Capital Loss Carryforward [Member] Deductions derived from capital losses that cannot be utilized on the tax return during a period that have been carried forward to reduce taxable income or taxes payable in a future year.    
Capital Leases, Future Minimum Payments Due in Two and Three Years Amount of minimum lease payments for capital leases due in the second and third fiscal years following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Future Minimum Payments, Due in Rolling Year Two Amount of minimum lease payments for capital leases due in the second rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Requirements on Foreign Financial Institutions [Table Text Block] Tabular disclosure of capital requirements for branches of foreign financial institutions.    
Capital Leases, Future Minimum Payments, Due in Rolling Year Three Amount of minimum lease payments for capital leases due in the third rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Contingent Rental Payments Due Amount due based upon the occurrence of an event specified in the contractual terms.    
Capital Leases, Future Minimum Payments Receivable, Rolling after Year Five Amount of minimum lease payments to be received by the lessor for capital leases after the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Future Minimum Payments, Due in Rolling Year Four Amount of minimum lease payments for capital leases due in the fourth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]      
Capital Accumulation Plans Value of stock in an investment or savings plan established by the entity for the benefit of its employees that permits the employees to make investment decisions.    
Capital Addition Purchase Commitments [Member] Contractual obligation to increase property, plant and equipment either through construction or future purchases.    
Capital Leases of Lessor, Contingent Rentals, Basis Spread on Variable Rate The percentage points added to the reference rate to compute the variable rate on the lessor's capital lease (sales-type and direct financing leases).    
Capital Leases of Lessor [Abstract]      
Capital Leases, Future Minimum Payments Receivable, Rolling Maturity [Abstract]      
Capital Lease Obligations Incurred The increase during the period in capital lease obligations due to entering into new capital leases.    
Capital Leases, Future Minimum Payments, Due in Rolling Year Two and Three [Abstract]   Element was deprecated. 2016-01-31
Capital Lease Obligations, Current Amount of capital lease obligation due within one year or the normal operating cycle, if longer.    
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Other Property, Plant, and Equipment, Net [Abstract]      
Capital Expenditures Incurred but Not yet Paid Future cash outflow to pay for purchases of fixed assets that have occurred.    
Capital and Allowable Subordinated Borrowings [Abstract]      
Capital and Allowable Subordinated Borrowings Total of qualified stockholders' equity items, allowable subordinated borrowings, other deductions and allowable credits at the balance sheet date.    
Capital Leased Assets, Gross Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.    
Capital Leases, Future Minimum Payments, Due in Rolling Year Four and Five Amount of minimum lease payments for capital leases due in the fourth and fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Element was deprecated because of low usage. 2016-01-31
Capital Requirements on Foreign Financial Institutions [Table] Schedule detailing all of the capital requirements for branches of foreign financial institutions by entity.    
Capital Lease Obligations Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.    
Capital Expenditure, Discontinued Operations Amount of capital expenditure attributable to discontinued operations.    
Capital Leases, Balance Sheet, Assets by Major Class, Net The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization.    
Capital Leases, Future Minimum Payments Receivable, Rolling Year Four Amount of minimum lease payments to be received by the lessor for capital leases in the fourth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Property, Plant, and Equipment Other, Accumulated Depreciation Amount of accumulated depreciation on leased long-lived, physical assets used to produce goods and services and not intended for resale meeting the criteria for capitalization, classified as other.    
Capital Leases, Future Minimum Payments Receivable, Remainder of Fiscal Year Amount of minimum lease payments to be received by the lessor for capital leases in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Future Minimum Payments Receivable, Next Rolling Twelve Months Amount of minimum lease payments to be received by the lessor for capital leases in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Future Minimum Payments, Net Minimum Payments, Rolling Maturity [Abstract]      
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments, Rolling Maturity [Abstract]      
Capital Leases, Future Minimum Payments, Receivable in Two Years Amount of minimum lease payments to be received by the lessor for capital leases in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Future Minimum Payments Receivable, Next Twelve Months Amount of minimum lease payments to be received by the lessor for capital leases in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Income Statement, Amortization Expense The charge for the use of long-lived depreciable capital leased assets for the period.    
Capital Leases, Lessor Balance Sheet, Net Investment in Direct Financing and Sales Type Leases, Noncurrent [Abstract]      
Capital Leases, Lessor Balance Sheet, Net Investment in Direct Financing and Sales Type Leases, Current [Abstract]      
Capital Leases, Income Statement, Direct Financing Lease Revenue Revenue realized in the period on direct financing leases.    
Capital Leases, Future Minimum Payments, Receivable in Four Years Amount of minimum lease payments to be received by the lessor for capital leases in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.    
Capital Leases, Future Minimum Payments, Receivable Thereafter Amount of minimum lease payments to be received by the lessor for capital leases after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Lessor Balance Sheet, Net Investment in Direct Financing Leases, Noncurrent The net amount due after one year of the balance sheet date or beyond the normal operating cycle, if longer, consisting of: (a) minimum lease payments due on direct financing leases, (b) unguaranteed residual value, and (c) any unamortized initial direct costs; less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments.    
Capital Leases, Future Minimum Payments, Receivable in Five Years Amount of minimum lease payments to be received by the lessor for capital leases in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Future Minimum Payments, Net Minimum Payments, Fiscal Year Maturity [Abstract]      
Capital Leases, Future Minimum Payments, Receivable in Three Years Amount of minimum lease payments to be received by the lessor for capital leases in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Lessor Balance Sheet, Net Investment in Direct Financing and Sales Type Leases, Current The net amount due within one year of the balance sheet date or the normal operating cycle, if longer, consisting of: (a) minimum lease payments due on direct financing and sales-type leases, (b) unguaranteed residual value, and (c) any unamortized initial direct costs on direct financing leases; less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments.    
Capital Leases, Income Statement, Interest Expense The financing charge for leasing arrangements meeting the criteria for capitalization.    
Capital Leases, Future Minimum Payments Due in Two Years Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Future Minimum Payments Due, Next Twelve Months Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Lessor Balance Sheet, Net Investment in Direct Financing and Sales Type Leases, Noncurrent The net amount due after one year of the balance sheet date or beyond the normal operating cycle, if longer, consisting of: (a) minimum lease payments due on direct financing and sales-type leases, (b) unguaranteed residual value, and (c) any unamortized initial direct costs on direct financing leases; less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments.    
Capital Leases, Future Minimum Payments Due in Four Years Amount of minimum lease payments for capital leases due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Future Minimum Payments Due Thereafter Amount of minimum lease payments for capital leases due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Future Minimum Payments, Net Present Value [Abstract]      
Capital Leases, Future Minimum Sublease Rentals Minimum payments receivable in the future under noncancelable subleases.    
Capital Leases, Income Statement of Lessee [Abstract]      
Capital Leases, Income Statement, Lease Revenue Total amount of lease revenue realized in the period on leasing arrangements.    
Capital Leases, Indemnification Agreements, Description Description of a lease related indemnification agreement including the nature of the indemnification, the maximum potential amount of future payments the lessee (guarantor) could be required to make under the agreement, the current carrying amount of the liability and the nature of any recourse provision that would enable the lessee (guarantor) to recover from third parties any of the amounts paid under the agreement and any assets held either as collateral or by third parties that upon occurrence of any triggering event or condition under the indemnification agreement the guarantor can obtain and liquidate to recover all or a portion of the amounts paid under the indemnification agreement.    
Capital Leases, Future Minimum Payments Due in Five Years Amount of minimum lease payments for capital leases due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Income Statement, Lease Revenue, Income Statement of Lessor [Abstract]      
Capital Leases, Future Minimum Payments Due in Three Years Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.    
Capital Leases, Lessor Balance Sheet [Abstract]      
Capital Leases, Future Minimum Payments, Interest Included in Payments Amount necessary to reduce net minimum lease payments to present value for capital leases.    
Capital Leases, Future Minimum Payments, Executory Costs Amounts to be paid by lessee to lessor for maintenance, insurance, and tax expenses related to the leased asset.    
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.    
Capital Leases, Lessee Balance Sheet [Abstract]      
Capital Leases, Lessor Balance Sheet, Net Investment in Direct Financing Leases, Current The net amount due within one year of the balance sheet date or the normal operating cycle, if longer, consisting of: (a) minimum lease payments due on direct financing leases, (b) unguaranteed residual value, and (c) any unamortized initial direct costs, less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments.    
Capital Leases, Future Minimum Payments Receivable Amount of minimum lease payments to be received by the lessor for capital leases.    
Capital Leases, Indemnification Agreements, Payments Amount of payments made under the terms of an indemnification agreement contained in a lease.    
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments, Fiscal Year Maturity [Abstract]      
Capital Leases, Future Minimum Payments Receivable, Fiscal Year Maturity [Abstract]      
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Other Property, Plant, and Equipment, Gross Amount before depreciation of leased long-lived, physical assets used to produce goods and services and not intended for resale meeting the criteria for capitalization, classified as other.    
Capital Leases, Income Statement, Sales Type Lease Revenue Revenue realized in the period on sales type leases.    
Capital Unit, Class [Domain] Description of the type or class of capital units or capital shares.    
Capital Leases, Net Investment in Direct Financing Leases, Executory Costs Estimated remaining costs to be incurred to service the direct financing lease, such as taxes, maintenance and insurance and the profit thereon, that are included in the minimum lease payments.    
Capital to Risk Weighted Assets Total Capital divided by risk weighted assets as defined in the regulations.    
Capital Leases, Net Investment in Sales Type Leases, Allowance for Uncollectible Minimum Lease Payments The estimate of minimum payments on sales-type leases that are probable of not being collected as of the balance sheet date.    
Capital Units, Adjustment for Market Changes The adjustment for market appreciation or depreciation of capital units or shares.    
Capital Required to be Well Capitalized to Risk Weighted Assets The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action.    
Capital Unit, Class A [Member] Class A of capital units, which are a type of ownership interest in a corporation.    
Capital Units, Deductions from Cost to Investors, Explanation Description of deductions from cost to investors of capital shares or other capital units for fees, loads and other charges.    
Capital Leases, Net Investment in Direct Financing Leases [Abstract]      
Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received Amount of remaining payments as of the balance sheet date that lessees are obligated to make or can be required to make under direct financing leases, including any guarantee of residual value and executory costs. The amount also includes any guaranteed rental payments by an unrelated third-party provided that are financially capable of making such payments.    
Capital Units, Cost to Investors Cost to investors of each class of capital shares or other capital units.    
Capital Units, Authorized Number of authorized capital units or capital shares. This element is relevant to issuers of face-amount certificates and registered investment companies.    
Capital Leases, Net Investment in Sales Type Leases, Deferred Income The remaining (unamortized) difference between the gross investment in a sales-type lease and the cost or carrying amount of the leased property as of the balance sheet date.    
Capital Leases, Net Investment in Sales Type Leases The net investment in sales type leases as of the balance sheet date consisting of: (a) minimum lease payments on sales type leases and (b) unguaranteed residual value; less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments.    
Capital Required for Capital Adequacy The minimum amount of Total Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.    
Capital Leases, Net Investment in Direct Financing Leases, Deferred Income The remaining (unamortized) difference between the gross investment in a direct financing lease and the cost or carrying amount, if different, of the leased property as of the balance sheet date.    
Capital Leases, Net Investment in Direct Financing and Sales Type Leases The lessor's asset under sales type and direct financing leases. The net investment in direct financing and sales-type leases as of the balance sheet date consisting of: (a) minimum lease payments due on direct financing leases, (b) unguaranteed residual value, and (c) any unamortized initial direct costs on direct financing leases; less: (i) estimated executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments.    
Capital Required to be Well Capitalized The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action.    
Capital Unit, Class B [Member] Class B of capital units, which are a type of ownership interest in a corporation.    
Capital Leases, Lessor Balance Sheet, Net Investment in Sales Type Leases, Current The net amount due within one year of the balance sheet date or the normal operating cycle, if longer, consisting of: (a) minimum lease payments on sales type leases and (b) unguaranteed residual value; less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments.    
Capital Unit [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Capital Leases, Net Investment in Direct Financing Leases, Accumulated Amortization Accumulated amortization of deferred income and initial direct costs pertaining to direct financing leases, which resulted from producing constant periodic rates of return on the net investments in the leases over their respective lease terms.    
Capital Required for Capital Adequacy to Risk Weighted Assets The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.    
Capital Units, Value Value of capital units or capital shares. This element is relevant to issuers of face-amount certificates and registered investment companies.    
Capital Leases, Net Investment in Sales Type Leases, Minimum Payments to be Received Amount of remaining payments as of the balance sheet date that lessees are obligated to make or can be required to make under sales-type leases, including any guarantee of residual value and executory costs. The amount also includes any guaranteed rental payments by an unrelated third-party provided that are financially capable of making such payments.    
Capital Units by Class [Axis] Information by type or class of the entity's capital units.    
Capital Leases, Net Investment in Direct Financing Leases, Allowance for Uncollectible Minimum Lease Payments The estimate of contractual payments on direct financing leases that are probable of not being collected as of the balance sheet date.    
Capital Leases, Net Investment in Sales Type Leases [Abstract]      
Capital Leases, Net Investment in Sales Type Leases, Unguaranteed Residual Values of Leased Property The estimate of the lease property's economic value at the end of the sales-type lease term excluding any amounts guaranteed by either the lessee or a third-party.    
Capital Requirement of Consolidated Broker-Dealer Subsidiary Electing Alternative Method Capital requirements of broker-dealer subsidiary calculated under the alternative method allowed for broker-dealers that are part of consolidated supervised entities.    
Capital Units, Outstanding Number of capital units or capital shares outstanding. This element is relevant to issuers of face-amount certificates and registered investment companies.    
Capital Leases, Lessor Balance Sheet, Net Investment in Sales Type Leases, Noncurrent The net amount due after one year of the balance sheet date or beyond the normal operating cycle, if longer, consisting of: (a) minimum lease payments on sales type leases, and (b) unguaranteed residual value; less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments.    
Capital Leases, Net Investment in Sales Type Leases, Executory Costs Estimated remaining costs to be incurred to service the sales-type lease, such as taxes, maintenance and insurance and the profit thereon, that are included in the minimum lease payments.    
Capital Leases, Net Investment in Direct Financing Leases, Unguaranteed Residual Values of Leased Property The estimate of the lease property's economic value at the end of the direct financing lease term excluding any amounts guaranteed by either the lessee or a third-party.    
Capital Leases, Net Investment in Direct Financing Leases The net investment in direct financing leases as of the balance sheet date consisting of: (a) minimum lease payments due on direct financing leases, (b) unguaranteed residual value, and (c) any unamortized initial direct costs; less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments.    
Capital Leases, Net Investment in Direct Financing and Sales Type Leases [Abstract]      
Capital Leases, Net Investment in Direct Financing Leases, Initial Direct Costs Remaining unamortized costs as of the balance sheet date that were essential to acquiring the lease, and that would not otherwise have been incurred without the lease agreement, including evaluating the lessee's credit condition, guarantees, and collateral and costs incurred negotiating, processing, and closing the lease agreement.    
Capital Units, Deduction from Cost to Investors Amount of deductions from cost to investors of capital shares or other capital units for fees, loads and other charges.    
Capital Units, Net Amount Net amount applicable to investors of capital units or shares.    
Capital Units [Member] Type of ownership interest in a corporation. Class of capital units or capital shares.    
Capitalization, Long-term Debt and Equity [Abstract]      
Capitalization, Long-term Debt and Equity This element represents the total consolidated (as applicable) capitalization of the entity which is comprised of its long-term debt and equity instruments. The table may be detailed by subsidiary (legal entity) and include information by type of debt or equity detailed by instrument.    
Capitalization and Amortization of Fuel Costs, Policy [Policy Text Block] Disclosure of accounting policy for fuel costs amortized and recorded and recovered through rates, such as under a fuel adjustment clause or other tracking arrangement.    
Deferred Policy Acquisition Costs, Policy [Policy Text Block] Disclosure of accounting policy for deferred policy acquisition costs, including the nature, type, and amount of capitalized costs incurred to write or acquire insurance contracts, and the basis for and methodologies applied in capitalizing and amortizing such costs.    
Capitalization of Internal Costs, Policy [Policy Text Block] Disclosure of accounting policy for capitalizing internal costs associated with exploration and production activities.    
Capitalized Costs, Asset Retirement Costs The amount of asset retirement costs previously incurred and capitalized separately from the capitalized amount of the associated long-lived assets.    
Capitalized Computer Software, Gross Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software.    
Capitalized Costs, Accumulated Depreciation, Depletion, Amortization and Valuation Allowance Relating to Oil and Gas Producing Activities Amount of accumulated depreciation, depletion, amortization and valuation allowance relating to oil and gas producing activities.    
Project [Axis] Information by project.    
Capitalized Exploratory Well Costs The amount of capitalized exploratory well costs that is pending the determination of proved reserves. This does not include amounts that were capitalized and subsequently expensed in the same annual period.    
Capitalized Contract Cost [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Capitalized Costs, Mineral Interests in Unproved Properties Capitalized costs of unproven properties that include fee ownership or a lease, concession, or other interest representing the right to extract oil or gas subject to such terms as may be imposed by the conveyance of that interest.    
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative The sum of the capitalized costs incurred, as of the balance sheet date, of unproved properties excluded from amortization including acquisition costs, exploration costs, development costs, and production costs.    
Capitalized Computer Software, Amortization Amount of expense for amortization of capitalized computer software costs.    
Capitalized Costs, Unproved Properties Capitalized costs of unproved properties incurred for any combination mineral interests acquisitions and other costs not previously disclosed within this table.    
Capitalized Contract Cost [Table Text Block] Tabular disclosure of cost capitalized in obtaining or fulfilling contract with customer.    
Capitalized Exploratory Well Cost, Period Increase (Decrease) Amount of increase (decrease) in capitalized exploratory well costs.    
Capitalized Costs, Proved Properties Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table.    
Capitalized Computer Software, Amortization For each income statement presented, the amount charged to expense for amortization of capitalized computer software costs. Element was deprecated because it has a credit balance attribute. 2016-01-31
Capitalized Costs of Unproved Properties Excluded from Amortization, Period Cost The sum of the capitalized costs incurred during the period of unproved properties excluded from amortization including acquisition costs, exploration costs, development costs, and production costs.    
Capitalized Contract Cost, Net, Classified [Abstract]      
Capitalized Contract Cost, Net, Current Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer; classified as current.    
Capitalized Computer Software, Net [Abstract]      
Capitalized Computer Software, Impairments Amount of impairment loss from capitalized computer software costs.    
Capitalized Costs of Unproved Properties Excluded from Amortization, Period Cost [Abstract]      
Capitalized Computer Software, Net The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.    
Capitalized Contract Cost, Amortization Period Amortization period of cost capitalized in obtaining or fulfilling contract with customer, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.    
Capitalized Costs, Support Equipment and Facilities Capitalized costs incurred for support equipment and facilities used in oil and gas producing activities (such as seismic equipment, drilling equipment, construction and grading equipment, vehicles, repair shops, warehouses, supply points, camps, and division, district, or field offices).    
Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year The amount of exploratory well costs that have been capitalized for a period of greater than one year after the completion of drilling.    
Capitalized Contract Cost, Impairment Loss Amount of impairment loss for asset recognized from cost incurred to obtain or fulfill contract with customer.    
Capitalized Contract Cost, Judgment Description of judgment made in determining cost incurred to obtain or fulfill contract with customer.    
Capitalized Contract Cost [Axis] Information by cost capitalized in obtaining or fulfilling contract with customer.    
Capitalized Exploratory Well Cost, Charged to Expense Amount of expense for capitalized exploratory well costs for which proved reserves were not found at the exploratory well.    
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Table] These elements contain detailed information for the capitalized costs relating to oil and gas producing activities by geographic area.    
Capitalized Costs Relating to Oil and Gas Producing Activities Disclosure [Table Text Block] Tabular disclosure of aggregate capitalized costs relating to an enterprise's oil and gas producing activities and the aggregate related accumulated depreciation, depletion, amortization, and valuation allowances.    
Capitalized Contract Cost, Gross Amount, before accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.    
Capitalized Contract Cost [Table] Disclosure of information about cost capitalized in obtaining or fulfilling contract with customer.    
Capitalized Computer Software, Impairments For each income statement presented, the amount charged to expense for write-downs of capitalized computer software costs to net realizable value. Element was deprecated because it has a credit balance attribute. 2016-01-31
Capitalized Computer Software, Accumulated Amortization For each balance sheet presented, the amount of accumulated amortization for capitalized computer software costs.    
Capitalized Contract Cost, Amortization Method Description of method used for amortizing cost capitalized in obtaining or fulfilling contract with customer.    
Capitalized Contract Cost, Net, Noncurrent Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer; classified as noncurrent.    
Capitalized Exploratory Well Costs, Roll Forward [Table Text Block] Tabular disclosure of the change in capitalized exploratory costs during the period.    
Capitalized Costs, Oil and Gas Producing Activities, Gross The sum of capitalized costs relating to oil and gas producing activities before accounting for accumulated depreciation.    
Capitalized Costs, Oil and Gas Producing Activities, Net Net amount of capitalized costs relating to oil and gas producing activities.    
Capitalized Exploratory Well Costs, Interim Significant Change Interim financial statement disclosure that includes information about any significant change in the information disclosed in the most recent annual financial statements related to capitalized exploratory well costs.    
Capitalized Costs, Oil and Gas Producing Activities, Net [Abstract]      
Capitalized Computer Software, Additions Additions made to capitalized computer software costs during the period.    
Capitalized Costs, Wells and Related Equipment and Facilities Capitalized costs which include those incurred to (1) to drill and equip those exploratory wells and exploratory-type stratigraphic test wells that have found proved reserves and (2) obtain access to proved reserves and provide facilities for extracting, treating, gathering, storing the oil and gas, including the drilling and equipping of development wells and development-type stratigraphic wells and service wells.    
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative [Abstract]      
Capitalized Contract Cost, Amortization Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer.    
Capitalized Contract Cost, Net [Abstract]      
Capitalized Contract Cost, Accumulated Amortization Amount of accumulated amortization of asset recognized from cost incurred to obtain or fulfill contract with customer.    
Capitalized Costs of Unproved Properties Excluded from Amortization [Table] This table may be used to disclose all or parts of the required disclosure information related to capitalized costs of unproved properties and major development projects that are excluded from capitalized costs being amortized. This includes total costs excluded and, at a minimum, these categories of costs: acquisition costs, exploration costs, development costs in the case of significant development projects, and capitalized interest.    
Capitalized Costs, Oil and Gas Producing Activities, Gross [Abstract]      
Capitalized Contract Cost, Accumulated Impairment Amount of accumulated impairment loss for asset recognized from cost incurred to obtain or fulfill contract with customer.    
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Capitalized Exploratory Well Costs [Abstract]      
Capitalized Exploratory Well Cost, Additions Pending Determination of Proved Reserves Additions to capitalized exploratory well costs that were added during the reporting period pending the determination of proved reserves.    
Capitalized Contract Cost [Abstract]      
Capitalized Exploratory Well Cost, Charged to Expense Capitalized exploratory well costs that were expensed during the year because proved reserves were not found at the exploratory well. Element was deprecated because it has a credit balance attribute. 2016-01-31
Capitalized Costs, Mineral Interests in Proved Properties Capitalized costs of proved properties that include fee ownership or a lease, concession, or other interest representing the right to extract oil or gas subject to such terms as may be imposed by the conveyance of that interest.    
Capitalized Contract Cost, Net Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.    
Capitalized Computer Software, Period Increase (Decrease) Amount of increase (decrease) in capitalized computer software costs.    
Capitalized Contract Cost [Domain] Cost capitalized in obtaining and fulfilling contract with customer.    
Capitalized Costs, Uncompleted Wells, Equipment and Facilities Capitalized costs of which include those incurred to (1) drill and equip wells that are not yet completed (2) acquire or construct equipment and facilities that are not yet installed.    
Capitalized Exploratory Well Costs that Have Been Capitalized for Period of One Year or Less The amount of exploratory well costs that have been capitalized for a period of one year or less after the completion of drilling.    
Capitalized Software Development Costs for Software Sold to Customers Unamortized costs incurred for development of computer software, which is to be sold, leased or otherwise marketed, after establishing technological feasibility through to the general release of the software products. Excludes capitalized costs of developing software for internal use.    
Cargo and Freight [Member] Product transported between locations.    
Cargo and Freight Revenue Revenue from transporting cargo and freight between locations. Element was deprecated because the financial reporting concept can be conveyed dimensionally. 2018-01-31
Carrying Value of Federal Funds Sold, Securities Purchased under Agreements to Resell, and Deposits Paid for Securities Borrowed Carrying value of federal funds sold, securities purchased under agreements to resell, and deposits paid for securities borrowed.    
Carrying Value of Federal Funds Sold, Securities Purchased under Agreements to Resell, and Deposits Paid for Securities Borrowed [Abstract]      
Reported Value Measurement [Member] Measured as reported on the statement of financial position (balance sheet).    
Carrying Value of Securities Purchased under Agreements to Resell and Deposits Paid for Securities Borrowed [Abstract]      
Carrying Costs, Property and Exploration Rights The costs incurred to retain exploration and property rights after acquisition but before production has occurred. Costs include legal costs for title defense, ad valorem taxes on nonproducing mineral properties, shut-in royalties, and delay rentals.    
Carrying Value of Securities Purchased under Agreements to Resell and Deposits Paid for Securities Borrowed Carrying value of securities purchased under agreements to resell and deposits paid for securities borrowed.    
Carrying Value of Securities Sold under Repurchase Agreements and Deposits Received for Securities Loaned Carrying value of securities sold under agreements to repurchase and deposits received for securities loaned.    
Carrying Value of Securities Sold under Repurchase Agreements and Deposits Received for Securities Loaned [Abstract]      
Carrying Value of Federal Funds Purchased, Securities Sold under Agreements to Repurchase, and Deposits Received for Securities Loaned [Abstract]      
Carrying Value of Federal Funds Purchased, Securities Sold under Agreements to Repurchase, and Deposits Received for Securities Loaned Carrying value of federal funds purchased and securities sold under repurchase agreements and deposits received for securities loaned.    
Cash, Including Discontinued Operations [Abstract]      
Cash Flows Between Transferor and Transferee, Purchases of Previously Transferred Financial Assets Cash Flows between a transferor and a transferee attributable to purchases of previously transferred financial assets (or its underlying collateral) related to a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets).    
Cash and Cash Equivalents, at Carrying Value [Abstract]      
Cash Flow, Financing Activities, Lessee [Abstract]      
Cash Surrender Value, Measurement Input Value of input used to measure cash surrender value of insurance policy.    
Cash and Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes effect from exchange rate changes.    
Cash and Cash Equivalents, Policy [Policy Text Block] Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.    
Cash Surrender Value, Valuation Technique [Extensible List] Indicates valuation technique for measuring cash surrender value of insurance policy.    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]      
Cash and Securities Segregated under Federal and Other Regulations Amount of cash subject to withdrawal restrictions, restricted deposits held as compensating balances, and cash and securities segregated in compliance with regulations (such as cash deposited in a special reserve account for the exclusive benefit of customers).    
Cash and Cash Equivalents, at Carrying Value, Including Discontinued Operations [Abstract]      
Cash and Cash Equivalents [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Cash and Cash Equivalents [Abstract]      
Cash Flows Between Transferor and Transferee, Servicing Fee Advances Cash flows between transferor and transferee in payment of service fees in advance, prior to or in contemplation of a securitization, asset-backed financing arrangement, or similar transfer in which the transferor will have continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets).    
Cash and Securities Segregated under Federal and Other Regulations [Abstract]      
Cash Proceeds Received and Tax Benefit from Share-based Payment Awards [Table Text Block] Tabular disclosure of cash received from exercise of stock options and similar instruments granted under share-based payment arrangements and tax benefit from exercise of stock options.    
Cash and Securities Segregated under Other Regulations Cash and securities deposited in a special reserve account for the exclusive benefit of customers pursuant to regulations other than SEC Regulations and the Commodity Exchange Act.    
Cash and Securities Segregated under SEC Regulation, Balance Sheet Disclosures [Abstract]      
Cash Flows Between Transferor and Transferee, Proceeds from Collections Reinvested in Revolving Period Transfers Cash Flows between a transferor and a transferee attributable to collections reinvested in revolving period transfers related to either a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets).    
Cash and Securities Segregated under Commodity Exchange Act Regulation Cash and securities deposited in a special reserve account for the exclusive benefit of customers pursuant to the Commodity Exchange Act.    
Cash and Cash Equivalents, Period Increase (Decrease) Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes.    
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Entity's cash and cash equivalents accounting policy with respect to restricted balances.  Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits.    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including, but not limited to, disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.    
Cash Acquired from Acquisition The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).    
Cash and Securities Segregated under Other Regulations [Abstract]      
Cash Surrender Value, Fair Value by Fair Value Hierarchy Level [Extensible List] Indicates level within fair value hierarchy of cash surrender value of insurance policy.    
Cash Flows Between Transferor and Transferee, Beneficial Interest Cash flows between transferee and transferor in payment of the transferor's beneficial interest related to a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction.    
Cash, Cash Equivalents, and Short-term Investments [Text Block] The entire disclosure of the components of cash, cash equivalents, and short-term investments. Short-term investments may include current marketable securities.    
Cash and Securities Segregated under Federal and Other Regulations, Description Disclosure of cash subject to withdrawal restrictions, restricted deposits held as compensating balances, and cash and securities segregated in compliance with regulations (such as cash deposited in a special reserve account for the exclusive benefit of customers).    
Cash Flows Between Transferor and Transferee, Repayments of Servicing Fee Advances Cash flows between transferee and transferor in repayment of service fee advances, in advance of a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets).    
Cash Flow, Operating Activities, Lessee [Abstract]      
Cash, Period Increase (Decrease), Excluding Exchange Rate Effect Amount of increase (decrease) in cash. Cash is the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes effect from exchange rate changes.    
Cash and Cash Equivalents Disclosure [Text Block] The entire disclosure for cash and cash equivalent footnotes,  which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify.    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect [Abstract]      
Cash and Cash Equivalents, Period Increase (Decrease) [Abstract]      
Cash Flows Between Transferor and Transferee, Servicing Fees Cash Flows between a transferee and a transferor attributable to servicing fees related to a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets).    
Cash Surrender Value, Change in Valuation Technique [true false] Indicates (true false) whether valuation technique or approach changed for measuring cash surrender value of insurance policy.    
Cash and Cash Equivalents [Member] Currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.    
Cash and Due from Banks [Abstract]      
Cash and Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect [Abstract]      
Cash and Cash Equivalents, at Carrying Value, Including Discontinued Operations For the entity and the disposal group, cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents.    
Cash and Cash Equivalents, Fair Value Disclosure Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.    
Cash Pass-through Reserve, Federal Home Loan Bank Amount of pass-through reserves deposited with Federal Reserve Banks from member institutions of Federal Home Loan Banks (FHLBanks).    
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers Cash Flows between a transferor and a transferee attributable to newly transferred assets related to either a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets).    
Cash, Cash Equivalents, and Marketable Securities [Text Block] The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss).    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Amount of increase (decrease) in cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; excluding effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.    
Cash and Securities Segregated under Commodity Exchange Act, Description Description of cash and securities deposited in a special reserve account for the exclusive benefit of customers pursuant to the Commodity Exchange Act.    
Cash and Cash Equivalents, Unrestricted Cash and Cash Equivalents, Policy [Policy Text Block] Disclosure of accounting policy for cash and cash equivalents with respect to unrestricted balances.    
Cash and Securities Segregated under Securities Exchange Commission Regulation Cash and securities deposited in a special reserve account for the exclusive benefit of customers.    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect [Abstract]      
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]      
Cash Flows Between Transferor and Transferee [Abstract]      
Cash Flow, Operating Activities, Lessor [Abstract]      
Cash Flows Between Transferor and Transferee, Receipts on Transferor's Interest in Transferred Financial Assets, Other Cash flows between transferor and a transferee attributable to the transferor's interests related to a securitization, asset-backed financing arrangement, or similar transfer in which the transferor will have continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets).    
Cash [Member] Currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits.    
Cash Flow, Investing Activities, Lessee [Abstract]      
Cash and Cash Equivalents, at Carrying Value Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.    
Cash and Due from Banks For banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks.    
Cash and Securities Segregated under Commodity Exchange Act [Abstract]      
Cash Surrender Value, Measurement Input [Extensible List] Indicates measurement input for cash surrender value of insurance policy.    
Cash, Period Increase (Decrease) Amount of increase (decrease) in cash. Cash is the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Includes effect from exchange rate changes.    
Cash and Securities Segregated under Other Regulations, Disclosures [Abstract]      
Cash, Period Increase (Decrease), Excluding Exchange Rate Effect [Abstract]      
Cash and Securities Segregated under Commodity Exchange Act Regulation [Abstract]      
Cash, Including Discontinued Operations Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Includes cash within disposal group or discontinued operation.    
Cash Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.    
Cash Acquired in Excess of Payments to Acquire Business The cash inflow associated with the acquisition of a business when the cash held by the acquired business exceeds the cash payments to acquire the business.    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; attributable to disposal group, including, but not limited to, discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.    
Cash Available for Distributions Amount of cash eligible for distribution to members or limited partners of limited liability company (LLC) or limited partnership (LP), subject to reserves to be maintained as defined in operating or partnership agreement, or in a credit facility agreement.    
Cash and Securities Segregated under Securities Exchange Commission Regulation [Abstract]      
Cash Flow, Operating Capital [Table Text Block] Tabular disclosure of the net increase (decrease) in operating capital in the operating section of the statement of cash flows, represents the entire footnote disclosure that provides details regarding the net change during the reporting period of all assets and liabilities used in operating activities.    
Cash and Cash Equivalents [Axis] Information by type of cash and cash equivalent balance.    
Cash Surrender Value, Change in Valuation Technique, Reason [Extensible List] Indicates reason valuation technique or approach changed for measuring cash surrender value of insurance policy.    
Cash and Securities Segregated under Federal and Other Regulations Disclosures [Abstract]      
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]      
Cash Equivalents, at Carrying Value [Abstract]      
Cash Flow Hedges Derivative Instruments at Fair Value, Net Net fair value of all derivative instruments designated as cash flow hedging instruments, which is ordinarily reflected within other comprehensive income.    
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees This element represents disclosure of the total aggregate cash dividends paid to the entity by consolidated subsidiaries, by unconsolidated subsidiaries, and by 50% or less owned persons accounted for using the equity method.    
Cash Flow Hedge Derivative Instrument Assets at Fair Value Fair value of all asset derivatives designated as cash flow hedging instruments.    
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees [Abstract]      
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, 50 Percent or Less Owned Persons This element represents disclosure of the aggregate cash dividends paid to the entity by 50% or less owned persons accounted for using the equity method.    
Cash Collateral for Borrowed Securities Carrying amount as of the balance sheet date of cash collateral held for borrowed securities, for which the cash is restricted as to withdrawal or usage.    
Cash Flow Hedge Ineffectiveness is Immaterial A disclosure of an assertion that the amount of cash flow hedge ineffectiveness is immaterial.    
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]      
Cash Equivalents [Member] Short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.    
Cash Distribution [Member] Distribution of cash made by the entity based on a contractual agreement such as a partnership or employment agreement.    
Cash Divested from Deconsolidation Reduction in cash due to no longer including the former subsidiary's cash in the consolidated entity's cash.    
Cash Equivalents, at Carrying Value Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.    
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.    
Cash Flow, Supplemental Disclosures [Text Block] The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.    
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Consolidated Subsidiaries This element represents disclosure of the aggregate cash dividends paid to the entity by consolidated subsidiaries.    
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value Fair value of all liability derivatives designated as cash flow hedging instruments.    
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Unconsolidated Subsidiaries This element represents disclosure of the aggregate cash dividends paid to the entity by unconsolidated subsidiaries.    
Cash Surrender Value [Member] Cash that could be realized under a life insurance contract or contracts owned by the Company (for example, but not limited to corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI)).    
Cash Surrender Value Due Policyholders [Abstract]      
Cash Flow Hedging [Member] Hedge of the exposure to variability in the cash flows of a recognized asset or liability, or of a forecasted transaction, that is attributable to a particular risk.    
Cash Segregated under Other Regulations Cash deposited in a special reserve account for the exclusive benefit of customers pursuant to regulations other than SEC Regulations and the Commodity Exchange Act.    
Cash Reserve Deposit Required and Made Cash deposited in a special reserve account for the exclusive benefit of customers pursuant to SEC Regulations.    
Cash Surrender Value of Life Insurance Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.    
Cash, Insured and Uninsured [Abstract]      
Cash, Uninsured Amount The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation.    
Cash Provided by (Used in) Operating Activities, Discontinued Operations Amount of cash inflow (outflow) of operating activities of discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.    
Cash Surrender Value, Fair Value Disclosure Fair value portion of the amount that could be realized under a life insurance contract or contracts owned by the entity, commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI).    
Cash, Cash Equivalents, and Short-term Investments [Abstract]      
Cash, Uninsured Amount, Commentary Information about cash that is uninsured. May discuss factors mitigating risk of loss due to failure of a financial institution in which the cash is deposited, or an assertion that risk of loss is considered very low. Element was deprecated because of low usage. 2016-01-31
Cash Surrender Value Due Policyholders, Amount Amount of the entity's obligations under long-duration contracts with respect to cash it must pay to policyholders upon their terminating, or surrendering, their insurance contracts.    
Cash Surrender Value Due Policyholders, Description Description of the entity's obligations under long-duration contracts with respect to the amount it must pay to policyholders upon their terminating, or surrendering, their insurance contracts.    
Cash, Cash Equivalents, and Short-term Investments Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.    
Cash Segregated under Commodity Exchange Act Regulation Cash deposited in a special reserve account for the exclusive benefit of customers pursuant to the Commodity Exchange Act.    
Cash, FDIC Insured Amount The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.    
Cash, Cash Equivalents, and Federal Funds Sold The sum of cash and cash equivalents plus Federal Funds Sold. Cash and cash equivalents consist of short term, highly liquid investments that are readily convertible to known amounts of cash and are so near their maturity that they present negligible risk of changes in value due to changes in interest rates -- usually with an original maturity less than 90 days.    
Cash Provided by (Used in) Financing Activities, Discontinued Operations Amount of cash inflow (outflow) of financing activities of discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.    
Cash, Cash Equivalents, and Federal Funds Sold [Abstract]      
Cash Provided by (Used in) Investing Activities, Discontinued Operations Amount of cash inflow (outflow) of investing activities of discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.    
Casino Revenue Revenues generated by casino operations. Also includes revenues generated by and derived from a hotel's, including cruise lines, gaming operations; likewise, such revenues may be derived from gaming operations that also are hoteliers. Element was deprecated because the financial reporting concept can be conveyed dimensionally. 2018-01-31
Casino Expenses This element represents the cost of generating revenues from a hotel's, including cruise lines, gaming operations; likewise, such revenues may be derived from gaming operations that also are hoteliers. Element was deprecated because the financial reporting concept can be conveyed dimensionally. 2018-01-31
Casino [Member] Facility used for gaming operation.    
Catastrophe [Member] Natural event resulting in great loss.    
Catastrophic Event [Domain] Catastrophic event, for example, but not limited to, earthquake, windstorm, fire or explosion.    
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Table] Description of the reasons for the change in incurred claims and claim adjustment expenses recognized in the income statement attributable to insured events of prior fiscal years. Also includes disclosures of additional premiums or return premiums accrued as a result of changes in incurred claims and claim adjustment expenses.    
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Abstract]      
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense, Premium, Description Description of whether additional premiums or return premiums have been accrued as a result of the change in incurred claims and claim adjustment expenses.    
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense, Description Description of the reasons for the change in incurred claims and claim adjustment expenses recognized in the income statement attributable to insured events of prior fiscal years.    
Ceded Credit Risk [Table] Disclosure of information about reinsurer or group of reinsurers for whom the entity has a concentration of credit risk.    
Ceded Credit Risk [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Ceded Credit Risk, Reinsurer [Domain] Reinsurer or group of reinsurers for whom the entity has a concentration of credit risk.    
Ceded Credit Risk, Secured [Member] Reinsurance recoverable that is secured by collateral.    
Ceded Credit Risk, Collateralization [Domain] Collateralization of ceded credit risk.    
Ceded Credit Risk, Unsecured [Member] Reinsurance recoverable that is not secured by collateral.    
Ceded Credit Risk, Collateralization [Axis] Information as to collaterization of reinsurance recoverables.    
Ceded Credit Risk, Reinsurer [Axis] Information by reinsurer or group of reinsurers of concentrated credit risk arising from a reinsurance arrangement.    
Ceded Premiums Earned Amount of earned premiums ceded to other entities.    
Ceded Premiums Written Amount of written premiums ceded to other entities.    
Ceded Premiums Payable The consideration due to the assuming enterprise as of the balance sheet date under the terms of the reinsurance contract in exchange for the right to receive reimbursement from such entity for covered claims and expenses.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses Amount of expense related to loan loss not accounted for as debt securities, with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities, Carrying Amount, Net The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and other-than-temporary impairments), for certain contractual rights to receive money on demand or on fixed or determinable dates. This relates to loans accounted for as available-for-sale debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities, Outstanding Balance The undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loan, owed to the investor at the reporting date, whether or not currently due and whether or not any such amounts have been written or charged off by the investor. This relates to loans accounted for as available-for-sale debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference Change in the estimate of cash flows expected to be collected, after acquisition of a loan, which results in an increase in accretable yield (for example, if actual cash flows are significantly greater than previously expected).  This relates to loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities, Acquired, Contractually Required Payments Receivable at Acquisition Amount of contractually required payments receivable at acquisition of acquired loans accounted for as available-for-sale debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Table] Disclosure of information about the accretable yield of certain loans acquired in transfer accounted for as debt securities.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications (to) from Nonaccretable Difference [Abstract]      
Certain Loans Acquired in Transfer, Nonaccretable Difference The amount of the loan's contractually required payments receivable in excess of the amount of its cash flows expected to be collected. This relates to loans with deteriorating of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer, Accretable Yield The aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan. This relates to loans with deteriorating of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities [Abstract]      
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Reclassifications to Nonaccretable Difference Change in the estimate of cash flows expected to be collected, after acquisition of a loan, which results in a decrease in accretable yield (for example, as a result of an other-than-temporary impairment).  This relates to loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Table Text Block] Tabular disclosure of the reconciliation of contractual cash flows to the carrying amount relating to certain loans acquired in a transfer.    
Certain Methane Gas Reserves, Proved Reserves, Quantity The quantity of proved reserves related to methane gas that are deemed to be economically producible only as a consequence of existing Federal tax incentives. Element was deprecated because the guidance from which this element is derived is no longer applicable. 2018-01-31
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Other-than-Temporary Impairment Charges, Credit Loss Amount of expense to write-down the amortized cost basis of loans, after acquisition, to fair value when the decline in the fair value is determined to be other than temporary (OTTI) for loans accounted for as debt securities.    
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities, Other-than-Temporary Impairment Charges, Credit Loss Amount of expense to write-down the amortized cost basis of loans, after acquisition, to fair value when the decline in the fair value is determined to be other than temporary (OTTI) for loans accounted for as available-for-sale debt securities.    
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities, Not Accounted for Using Income Recognition Model [Abstract]      
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield The aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan for loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period [Abstract]      
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities, Acquired, Cash Flows Expected to be Collected at Acquisition Amount of cash flows expected to be collected at acquisition of acquired loans accounted for as available-for-sale debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Disposals of Loans Sale or transfer of a loan during the period resulting in a reduction in the excess of a loan's cash flows expected to be collected over the investor's initial investment.  This relates to loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value Fair value at acquisition of acquired loans accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Methane Gas Reserves, Proved Reserves, Carrying Amount The carrying amount of proved reserves related to methane gas that are deemed to be economically producible only as a consequence of existing Federal tax incentives. Element was deprecated because the guidance from which this element is derived is no longer applicable. 2018-01-31
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition Amount of cash flows expected to be collected at acquisition of acquired loans accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Table] Schedule presenting certain loans acquired in a transfer relating to specific counterparties.    
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities [Abstract]      
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications (to) from Nonaccretable Difference Amount of reclassification (to) from nonaccretable difference (from) to the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities, Acquired [Abstract]      
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model [Table] Disclosure of information about certain loans acquired in transfer accounted for as debt securities for which the income recognition model is not applied.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses, Decreases Amount of reduction in the reserve for loans impairments as a result of current information and events which result in it being probable that estimated cash flows will be significantly higher than previously expected or because actual cash flows are significantly greater than cash flows previously expected for loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities, Acquired, at Acquisition, at Fair Value Fair value at acquisition of acquired loans accounted for as available-for-sale debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Accounted for as Held-to-maturity Debt Securities, Other-than-Temporary Impairment Charges, Credit Loss Amount of expense to write-down the amortized cost basis of loans, after acquisition, to fair value when the decline in the fair value is determined to be other than temporary (OTTI) for loans accounted for as held-to-maturity debt securities.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease) Amount of increase (decrease) of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans accounted for as debt securities, with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Accretion Current period recognition due to accretion of the excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan for loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities, Acquired During Period, Not Accounted for Using Income Recognition Model, at Acquisition, at Carrying Value The recorded value, at the acquisition date, of loans for which the income recognition model was not applied. This relates to loans accounted for as available-for-sale debt securities acquired during the period, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Additions Increases in the aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan due to the acquisition of similar loans accounted for as debt securities during the period. This relates to loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities [Abstract]      
Certain Loans Acquired in Transfer Accounted for as Held-to-maturity Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition Amount of contractually required payments receivable at acquisition of acquired loans accounted for as held-to-maturity debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Accounted for as Held-to-maturity Debt Securities [Abstract]      
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value Fair value at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion Amount of accretion recognized for the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities, with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Other-than-Temporary Impairment Charges, Credit Loss [Abstract]      
Certain Loans Acquired in Transfer Accounted for as Held-to-maturity Debt Securities, Carrying Amount, Net The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and other-than-temporary impairments), for certain contractual rights to receive money on demand or on fixed or determinable dates. This relates to loans accounted for as held-to-maturity debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Accounted for as Held-to-maturity Debt Securities, Not Accounted for Using Income Recognition Model [Abstract]   Element was deprecated. 2018-01-31
Certain Loans Acquired in Transfer Accounted for as Held-to-maturity Debt Securities, Outstanding Balance The undiscounted sum of all amounts, including amounted deemed principal, interest, fees, penalties, and other under the loan, owed to the investor at the reporting date. This relates to loans accounted for as held-to-maturity debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition Amount of contractually required payments receivable at acquisition of acquired loans accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Accounted for as Held-to-maturity Debt Securities, Acquired During Period, Not Accounted for Using Income Recognition Model, at Acquisition, at Carrying Value The recorded value, at the acquisition date, of loans accounted for as held-to-maturity debt securities acquired during the period, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable, for which the income recognition model was not applied.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference Amount of increase of reclassification from nonaccretable difference to the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Amount of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Carrying Amount, Net The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and other-than-temporary impairments), for loans accounted for as debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease) Amount of increase (decrease) of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Accounted for as Held-to-maturity Debt Securities, Acquired During Period, at Acquisition, at Fair Value Fair value at acquisition of acquired loans accounted for as held-to-maturity debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Additions Amount of additions to the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, Not Accounted for Using Income Recognition Model, at Acquisition, at Carrying Value The recorded value, at the acquisition date, of loans for which the income recognition model was not applied. This relates to loans accounted for as debt securities acquired during the period, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Transfers to Loans Held-for-sale Amount of reduction, resulting from a reclassification to held-for-sale, in the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Outstanding Balance The undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loan, owed to the investor at the reporting date, whether or not currently due and whether or not any such amounts have been written or charged off by the investor.  This relates to loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Disposals of Loans Amount of reduction, resulting from a sale or transfer of a loan, in the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period [Abstract]      
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model [Abstract]      
Certain Loans Acquired in Transfer Accounted for as Held-to-maturity Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition Amount of cash flows expected to be collected at acquisition of acquired loans accounted for as held-to-maturity debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.    
Certain Loans Acquired in Transfer Accounted for as Held-to-maturity Debt Securities, Acquired During Period [Abstract]      
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications to Nonaccretable Difference Amount of decrease from reclassification to nonaccretable difference of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Commercial, at Acquisition, at Fair Value Fair value at acquisition of acquired commercial loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Consumer, Outstanding Balance The undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loan, owed to the investor at the reporting date, whether or not currently due and whether or not any such amounts have been written or charged off by the investor.  This relates to consumer loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans and Debt Securities Acquired in Transfer, Description of how Prepayments are Considered in Determination of Contractual Cash Flows and Cash Flows Expected to be Collected Description of how prepayments are considered in determination of contractual cash flows and cash flows expected to be collected for the loan or debt security.  This relates to loans and debt securities for which at acquisition it was probable that the investor would be unable to collect all contractually required payments receivable or all cash flows expected at acquisition.    
Certain Loans and Debt Securities Acquired in Transfer, Recognizing Interest Income on Impaired Loans, Policy [Policy Text Block] Disclosure of accounting policy for recognizing interest income on loans and debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable, for which it is probable that the investor is unable to collect all cash flows expected at acquisition plus additional cash flows expected to be collected arising from changes in estimate after acquisition.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Commercial, Cash Flows Expected to be Collected at Acquisition Amount of cash flows expected to be collected at acquisition of acquired commercial loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Commercial, Contractually Required Payments Receivable at Acquisition Amount of contractually required payments receivable at acquisition of acquired commercial loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Commercial, Outstanding Balance The undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loan, owed to the investor at the reporting date, whether or not currently due and whether or not any such amounts have been written or charged off by the investor.  This relates to commercial loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses).  This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Consumer, Cash Flows Expected to be Collected at Acquisition Amount of cash flows expected to be collected at acquisition of acquired consumer loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance The undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loan, owed to the investor at the reporting date, whether or not currently due and whether or not any such amounts have been written or charged off by the investor.  This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Consumer, Contractually Required Payments Receivable at Acquisition Amount of contractually required payments receivable at acquisition of acquired consumer loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses Reserve for loans impairments recorded after acquisition as a result of current information and events which result in it being probable that estimated cash flows will be less than previously expected or because actual cash flows are less than cash flows previously expected.  This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition Amount of contractually required payments receivable at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Not Accounted for Using Income Recognition Model, at Acquisition The carrying amount as of the acquisition date of loans to which the income recognition total model was not applied.  This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer, for which it was deemed probable at acquisition that the investor would be unable to collect all contractually required payments.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Consumer, at Acquisition, at Fair Value Fair value at acquisition of acquired consumer loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans and Debt Securities Acquired in Transfer, with Related Allowance for Credit Losses Due to Subsequent Impairment The recorded amount of loans and debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it was probable, at acquisition, that the investor would be unable to collect all contractually required payments receivable. They are deemed to be impaired since the acquisition and an allowance for credit losses has been recorded. Disclosure is gross of the allowance.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition Amount of cash flows expected to be collected at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.    
Certain Loans and Debt Securities Acquired in Transfer, Subsequent Impairment [Abstract]      
Certain Loans and Debt Securities Acquired in Transfer, Allowance for Credit Losses Due to Subsequent Impairment For loans and debt securities, 1) for which at acquisition it was probable that the investor would be unable to collect all contractually required payments receivable, and 2) for which it is further probable that the investor will not be able to collect all cash flows expected at acquisition (plus any additional cash flows expected due to changes in estimate after acquisition), the allowance for credit losses recorded to reflect the impairment since acquisition.    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model [Abstract]      
Certain Loans and Debt Securities Acquired in Transfer, No Allowance Recorded and No Subsequent Impairment The recorded amount of loans and debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it was probable, at acquisition, that the investor would be unable to collect all contractually required payments receivable, but which are not deemed to be impaired since the acquisition by transfer. Therefore, no allowance for credit losses is recorded.    
Certificates of Deposit [Member] Short to medium-term investment available at banks and savings and loan institutions where a customer agrees to lend money to the institution for a certain amount of time and is paid a predetermined rate of interest. Certificates of deposit (CD) are typically Federal Deposit Insurance Corporation (FDIC) insured.    
Certificates of Deposit, at Carrying Value A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate.  A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit).  Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties.  Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.    
Certification Marks [Member] Any word, name, symbol, device, or any combination, used, or intended to be used, in commerce with the owner's permission by someone other than its owner, to certify regional or other geographic origin, material, mode of manufacture, quality, accuracy, or other characteristics of someone's goods or services, or that the work or labor on the goods or services was performed by members of a union or other organization.    
Change in Unrealized Gain (Loss) on Hedged Item in Foreign Currency Fair Value Hedge Amount of the increase (decrease) in fair value of the hedged item in a foreign currency fair value hedge which was recognized in earnings, net of offsets by the gain (loss) on the hedging instrument to the extent that the fair value hedge was determined to be effective.    
Change in Accounting Estimate by Type [Axis] Information by type of change in accounting estimate.    
Change in Closed Block Assets and Liabilities, Maximum Future Earnings to be Recognized [Table Text Block] Tabular disclosure of the changes in the maximum future earnings of the closed block.    
Change in Unrealized Gain (Loss) on Foreign Currency Fair Value Hedging Instruments Amount of gain (loss) from the increase (decrease) in fair value of foreign currency derivatives and nonderivative instruments designated as fair value hedging instruments which were recognized in earnings, net of offsets by the gain (loss) on the hedged item to the extent that the fair value hedge was determined to be effective.    
Change in Valuation Technique, Reason, Inactive Market [Member] Change in valuation technique because quoted price is no longer associated with active market.    
Change in Accounting Estimate, Type [Domain] Identification of the accounting estimate that was changed that had the effect of adjusting the carrying amount of an existing asset or liability, or that will alter the subsequent accounting for existing or future assets or liabilities.    
Change in Contract with Customer, Asset and Liability [Abstract]      
Change in Valuation Technique, Reason, Current Appraisal Unobtainable [Member] Change in valuation technique because current appraisal was unobtainable.