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Y","form":"10-K","filed":"2015-02-25"},{"end":"2014-12-31","val":211040000,"accn":"0000054507-15-000015","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-05"},{"end":"2014-12-31","val":211040000,"accn":"0000054507-15-000027","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-04"},{"end":"2014-12-31","val":211040000,"accn":"0000054507-15-000037","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-03"},{"end":"2014-12-31","val":211040000,"accn":"0000054507-16-000043","fy":2015,"fp":"Q4","form":"10-K","filed":"2016-02-24","frame":"CY2014Q4I"},{"end":"2015-03-31","val":210280000,"accn":"0000054507-15-000015","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-05","frame":"CY2015Q1I"},{"end":"2015-06-30","val":209520000,"accn":"0000054507-15-000027","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-04","frame":"CY2015Q2I"},{"end":"2015-09-30","val":208760000,"accn":"0000054507-15-000037","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-03","frame":"CY2015Q3I"},{"end":"2015-12-31","val":209763000,"accn":"0000054507-16-000043","fy":2015,"fp":"Q4","form":"10-K","filed":"2016-02-24"},{"end":"2015-12-31","val":209763000,"accn":"0000054507-16-000051","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-03"},{"end":"2015-12-31","val":209763000,"accn":"0000054507-16-000063","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-02"},{"end":"2015-12-31","val":209763000,"accn":"0000054507-16-000070","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-01"},{"end":"2015-12-31","val":209763000,"accn":"0000054507-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-22","frame":"CY2015Q4I"},{"end":"2016-03-31","val":209040000,"accn":"0000054507-16-000051","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-03","frame":"CY2016Q1I"},{"end":"2016-06-30","val":208318000,"accn":"0000054507-16-000063","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-02","frame":"CY2016Q2I"},{"end":"2016-09-30","val":207595000,"accn":"0000054507-16-000070","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-01","frame":"CY2016Q3I"},{"end":"2016-12-31","val":210654000,"accn":"0000054507-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-22"},{"end":"2016-12-31","val":210654000,"accn":"0000054507-17-000013","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-09"},{"end":"2016-12-31","val":210654000,"accn":"0000054507-17-000032","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-08"},{"end":"2016-12-31","val":210654000,"accn":"0000054507-17-000057","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-10-31"},{"end":"2016-12-31","val":210654000,"accn":"0000054507-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-21","frame":"CY2016Q4I"},{"end":"2017-03-31","val":209968000,"accn":"0000054507-17-000013","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-09","frame":"CY2017Q1I"},{"end":"2017-06-30","val":209283000,"accn":"0000054507-17-000032","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-08","frame":"CY2017Q2I"},{"end":"2017-09-30","val":208597000,"accn":"0000054507-17-000057","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-10-31","frame":"CY2017Q3I"},{"end":"2017-12-31","val":257093000,"accn":"0000054507-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-21"},{"end":"2017-12-31","val":257093000,"accn":"0000054507-18-000030","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":256406000,"accn":"0000054507-18-000030","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-08","frame":"CY2018Q1I"},{"end":"2025-12-31","val":155800000,"accn":"0001711269-26-000100","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-06","frame":"CY2025Q4I"},{"end":"2026-06-30","val":153800000,"accn":"0001711269-26-000100","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-06","frame":"CY2026Q2I"}]}},"AdditionalCollateralAggregateFairValue":{"label":"Additional 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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.","units":{"USD":[{"end":"2016-12-31","val":3156000,"accn":"0000054507-18-000030","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-08","frame":"CY2016Q4I"},{"end":"2017-03-31","val":3449000,"accn":"0000054507-18-000030","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-08","frame":"CY2017Q1I"},{"end":"2017-12-31","val":3520000,"accn":"0000054507-18-000030","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":11254000,"accn":"0000054507-18-000030","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-08","frame":"CY2018Q1I"},{"end":"2024-12-31","val":29900000,"accn":"0001711269-26-000100","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-06","frame":"CY2024Q4I"},{"end":"2025-06-30","val":35000000,"accn":"0001711269-26-000100","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-06","frame":"CY2025Q2I"},{"end":"2025-12-31","val":27000000,"accn":"0001711269-26-000100","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-06","frame":"CY2025Q4I"},{"end":"2026-06-30","val":27300000,"accn":"0001711269-26-000100","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-06","frame":"CY2026Q2I"}]}},"CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations":{"label":"Cash Provided by (Used in) Investing Activities, Discontinued Operations","description":"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.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":-22750000,"accn":"0001193125-11-045500","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009"}]}},"CashSurrenderValueOfLifeInsurance":{"label":"Cash Surrender Value of Life Insurance","description":"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.","units":{"USD":[{"end":"2010-12-31","val":1280615000,"accn":"0000054507-12-000007","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-12-31","val":1345443000,"accn":"0000054507-12-000007","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":1345443000,"accn":"0000054507-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011Q4I"},{"end":"2012-12-31","val":1370788000,"accn":"0000054507-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28"},{"end":"2012-12-31","val":1370788000,"accn":"0000054507-14-000005","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-26","frame":"CY2012Q4I"},{"end":"2013-12-31","val":1289457000,"accn":"0000054507-14-000005","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-26"},{"end":"2013-12-31","val":1289457000,"accn":"0000054507-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25","frame":"CY2013Q4I"},{"end":"2014-12-31","val":1306777000,"accn":"0000054507-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25"},{"end":"2014-12-31","val":1306777000,"accn":"0000054507-16-000043","fy":2015,"fp":"Q4","form":"10-K","filed":"2016-02-24","frame":"CY2014Q4I"},{"end":"2015-12-31","val":1299408000,"accn":"0000054507-16-000043","fy":2015,"fp":"Q4","form":"10-K","filed":"2016-02-24"},{"end":"2015-12-31","val":1299408000,"accn":"0000054507-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-22","frame":"CY2015Q4I"},{"end":"2016-12-31","val":1267349000,"accn":"0000054507-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-22"},{"end":"2016-12-31","val":1267349000,"accn":"0000054507-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-21","frame":"CY2016Q4I"},{"end":"2017-12-31","val":1320695000,"accn":"0000054507-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-21","frame":"CY2017Q4I"}]}},"CollateralAlreadyPostedAggregateFairValue":{"label":"Collateral 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Alternate caption for the concept is permanent 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Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.","units":{"USD":[{"end":"2009-12-31","val":3443000,"accn":"0001193125-11-045500","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2009-12-31","val":3443000,"accn":"0001193125-10-239758","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-10-28"},{"end":"2009-12-31","val":3443000,"accn":"0001193125-10-177778","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2010-06-30","val":3454000,"accn":"0001193125-10-177778","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":3459000,"accn":"0001193125-10-239758","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-10-28","frame":"CY2010Q3I"},{"end":"2010-12-31","val":3465000,"accn":"0001193125-11-295324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":3465000,"accn":"0001193125-11-210530","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":3465000,"accn":"0001193125-11-128705","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":3465000,"accn":"0001193125-11-045500","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":3465000,"accn":"0000054507-12-000007","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-12-31","val":0,"accn":"0000054507-12-000007","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"}]}},"TemporaryEquityIssuePeriodIncreaseOrDecrease":{"label":"Temporary Equity, Carrying Amount, Period Increase (Decrease)","description":"Change in the value of each type or class of stock classified as temporary equity during the period. The redemption requirement does not constitute an unconditional obligation that will be settled in a variable number of shares constituting a monetary value predominantly indexed to (a) a fixed monetary amount known at inception, (b) an amount inversely correlated with the residual value of the entity, or (c) an amount determined by reference to something other than the fair value of issuer's stock. Does not include mandatorily redeemable stock. The exception is if redemption is required upon liquidation or termination of the reporting 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Securities, Trading, and Equity Securities, FV-NI","description":"Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income 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Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Trading Securities which consist of all investments in certain debt and equity securities that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for which an entity has elected the fair value option. Trading generally reflects active and frequent buying and selling, and trading securities are generally used with the objective of generating profits on short-term differences in price, but this category of investments may also include items which are not intended to be sold in the near term or for which the fair value option has been elected.","units":{"USD":[{"end":"2010-12-31","val":39412000,"accn":"0001193125-11-295324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":39412000,"accn":"0001193125-11-210530","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":39412000,"accn":"0000054507-12-000007","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-06-30","val":41919000,"accn":"0001193125-11-210530","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":37264000,"accn":"0001193125-11-295324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":40201000,"accn":"0000054507-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011Q4I"},{"end":"2011-12-31","val":40201000,"accn":"0000054507-12-000029","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":40201000,"accn":"0000054507-12-000022","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-07"},{"end":"2011-12-31","val":40201000,"accn":"0000054507-12-000011","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-09"},{"end":"2011-12-31","val":40201000,"accn":"0000054507-12-000007","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2012-03-31","val":43369000,"accn":"0000054507-12-000011","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-09","frame":"CY2012Q1I"},{"end":"2012-06-30","val":41696000,"accn":"0000054507-12-000022","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-07","frame":"CY2012Q2I"},{"end":"2012-09-30","val":43382000,"accn":"0000054507-12-000029","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":43484000,"accn":"0000054507-13-000027","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-08","frame":"CY2012Q4I"},{"end":"2012-12-31","val":43484000,"accn":"0000054507-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28"},{"end":"2013-03-31","val":45775000,"accn":"0000054507-13-000027","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-08","frame":"CY2013Q1I"}]}},"TradingSecuritiesUnrealizedHoldingGainLoss":{"label":"Trading 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