Consolidated Balance Sheet (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Other liabilities, allowance for lending related commitments	$ 105	$ 103
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, authorized	100,000,000	100,000,000
Preferred stock, issued	5,001
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	3,500,000,000	3,500,000,000
Common stock, issued	1,251,527,230	1,249,061,305
Treasury stock, common shares	70,229,278	39,386,698
Operations
Held-to-maturity, fair value	8,869	3,540
Other assets, fair value	1,410	1,848
Other liabilities, allowance for lending related commitments	105	103
Other liabilities, fair value	455	382
Long-term debt, at fair value	$ 339	$ 326