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Plant and Equipment, Useful Life, Maximum (Deprecated 2012-01-31)","description":"The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.","units":{"pure":[{"start":"2010-01-01","end":"2010-12-31","val":40,"accn":"0001122304-11-000032","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-25","frame":"CY2010"}],"years":[{"start":"2011-01-01","end":"2011-12-31","val":40,"accn":"0001122304-12-000045","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24","frame":"CY2011"}]}},"PropertyPlantAndEquipmentUsefulLifeMinimum":{"label":"Property, Plant and Equipment, Useful Life, Minimum (Deprecated 2012-01-31)","description":"The minimum useful life of long lived, physical assets used in the normal conduct of business and not intended for resale. 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Includes liabilities not subject to a master netting arrangement.","units":{"USD":[{"end":"2015-06-30","val":543700000,"accn":"0001122304-15-000131","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-04","frame":"CY2015Q2I"}]}},"SecuritiesLoanedAsset":{"label":"Securities Loaned, Asset","description":"Amount of asset associated with securities loaned to entities in exchange for collateral.","units":{"USD":[{"end":"2013-12-31","val":766000000,"accn":"0001122304-15-000038","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-27","frame":"CY2013Q4I"},{"end":"2014-12-31","val":798000000,"accn":"0001122304-15-000038","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-27"},{"end":"2014-12-31","val":798000000,"accn":"0001122304-16-000201","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0,"accn":"0001122304-16-000201","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2015Q4I"}]}},"SecuritiesLoanedCollateralRightToReclaimCash":{"label":"Securities Loaned, Collateral, Right to Reclaim Cash","description":"Amount of right to receive cash collateral under master netting arrangements that have not been offset against securities loaned.","units":{"USD":[{"end":"2014-12-31","val":0,"accn":"0001122304-15-000131","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-04"},{"end":"2014-12-31","val":0,"accn":"0001122304-15-000173","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-10-29","frame":"CY2014Q4I"},{"end":"2015-06-30","val":0,"accn":"0001122304-15-000131","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-04","frame":"CY2015Q2I"},{"end":"2015-09-30","val":0,"accn":"0001122304-15-000173","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-10-29","frame":"CY2015Q3I"}]}},"SecuritiesLoanedCollateralRightToReclaimSecurities":{"label":"Securities Loaned, Collateral, Right to Reclaim Securities","description":"Amount of right to receive securities collateral under master netting arrangements that have not been offset against securities loaned.","units":{"USD":[{"end":"2014-12-31","val":-826900000,"accn":"0001122304-15-000131","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-04"},{"end":"2014-12-31","val":-826900000,"accn":"0001122304-15-000173","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-10-29","frame":"CY2014Q4I"},{"end":"2015-06-30","val":-543700000,"accn":"0001122304-15-000131","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-04","frame":"CY2015Q2I"},{"end":"2015-09-30","val":-4200000,"accn":"0001122304-15-000173","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-10-29","frame":"CY2015Q3I"}]}},"SecuritiesLoanedGross":{"label":"Securities Loaned, Gross","description":"Amount, before effects of master netting arrangements, of securities loaned to entities in exchange for collateral. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.","units":{"USD":[{"end":"2014-12-31","val":826900000,"accn":"0001122304-15-000131","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-04"},{"end":"2014-12-31","val":826900000,"accn":"0001122304-15-000173","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-10-29"},{"end":"2014-12-31","val":826900000,"accn":"0001122304-16-000201","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2014Q4I"},{"end":"2015-06-30","val":543700000,"accn":"0001122304-15-000131","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-04","frame":"CY2015Q2I"},{"end":"2015-09-30","val":4200000,"accn":"0001122304-15-000173","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-10-29","frame":"CY2015Q3I"}]}},"SecuritiesLoanedGrossIncludingNotSubjectToMasterNettingArrangement":{"label":"Securities Loaned, Gross Including Not Subject to Master Netting Arrangement","description":"Amount, before effects of master netting arrangements, of securities loaned to entities in exchange for collateral. Includes liabilities not subject to a master netting arrangement and elected not to be offset.","units":{"USD":[{"end":"2015-06-30","val":524700000,"accn":"0001122304-15-000131","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-04","frame":"CY2015Q2I"}]}},"SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral":{"label":"Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral","description":"Amount, after effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price offset against a right to receive collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset.","units":{"USD":[{"end":"2014-12-31","val":201700000,"accn":"0001122304-15-000131","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-04"},{"end":"2014-12-31","val":201700000,"accn":"0001122304-15-000173","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-10-29"},{"end":"2014-12-31","val":201700000,"accn":"0001122304-16-000201","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2014Q4I"}]}},"SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimCash":{"label":"Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash","description":"Amount of right to receive cash collateral under master netting arrangements that have not been offset against securities sold under agreement to repurchase.","units":{"USD":[{"end":"2014-12-31","val":0,"accn":"0001122304-15-000131","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-04"},{"end":"2014-12-31","val":0,"accn":"0001122304-15-000173","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-10-29"},{"end":"2014-12-31","val":0,"accn":"0001122304-16-000201","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2014Q4I"}]}},"SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities":{"label":"Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities","description":"Amount of right to receive securities collateral under master netting arrangements that have not been offset against securities sold under agreement to repurchase.","units":{"USD":[{"end":"2014-12-31","val":0,"accn":"0001122304-15-000131","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-04"},{"end":"2014-12-31","val":0,"accn":"0001122304-15-000173","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-10-29"},{"end":"2014-12-31","val":0,"accn":"0001122304-16-000201","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2014Q4I"}]}},"SecuritiesSoldUnderAgreementsToRepurchaseGross":{"label":"Securities Sold under Agreements to Repurchase, Gross","description":"Amount, before effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.","units":{"USD":[{"end":"2014-12-31","val":201700000,"accn":"0001122304-15-000131","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-04"},{"end":"2014-12-31","val":201700000,"accn":"0001122304-15-000173","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-10-29"},{"end":"2014-12-31","val":201700000,"accn":"0001122304-16-000201","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2014Q4I"}]}},"SegmentReportingInformationDepreciationDepletionAndAmortizationExpense":{"label":"Segment Reporting Information, Depreciation, Depletion, and Amortization Expense (Deprecated 2011-01-31)","description":"Amount of depreciation, depletion, and amortization expense for the reportable segment. 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Such disclosure is presented if the amount is: (a) included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or 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