Securities (Details 2) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Maturity schedule of securities available for sale
Due in one year or less, Amortized cost	$ 1,539
Due after one year through five years, Amortized cost	4,498
Due after five years through ten years, Amortized cost	780
Due after ten years, Amortized cost	13,337
Total debt securities available for sale, Amortized cost	20,240
Due in one year or less, Fair value	1,547
Due after one year through five years, Fair value	4,564
Due after five years through ten years, Fair value	800
Due after ten years, Fair value	13,548
Total securities available-for-sale, Fair Value	$ 20,545	$ 22,833

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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