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Investment Securities (Details Textuals) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
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Mar. 31, 2015
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Mar. 31, 2014
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Dec. 31, 2014
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| Investment Securities (Details) [Abstract] | |||
| Other-than-temporary impairments recognized during the period | $ 0us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount | $ 0us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount | |
| Gain on sale of securities | 0us-gaap_AvailableForSaleSecuritiesGrossRealizedGains | 39us-gaap_AvailableForSaleSecuritiesGrossRealizedGains | |
| Losses on sale of securities | $ 0us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses | $ 0us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses | |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This element represents the amount of loss recognized for other than temporary impairments (OTTI) of investments in debt and equity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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