XML 96 R63.htm IDEA: XBRL DOCUMENT v2.4.1.9
Investments in Securities Available-for-sale Securities 1 (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Investments, Debt and Equity Securities [Abstract]    
Gross realized gains $ 400us-gaap_AvailableForSaleSecuritiesGrossRealizedGains $ 3us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
Gross realized losses 7us-gaap_AvailableforsaleSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments 2us-gaap_AvailableforsaleSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments
Total proceeds $ 2,112us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds $ 35us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds