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This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false24false 2us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNetus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse-16000000-16USD$falsetruefalse2truefalsefalse-13000000-13USD$falsetruefalse3truefalsefalse-232000000-232USD$falsetruefalse4truefalsefalse-45000000-45USD$falsetruefalsexbrli:monetaryItemTypemonetaryThis 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. 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