Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $) In Millions, except Per Share data	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Common stock dividends, per share	$ 0.02	$ 0.02
Series A preferred stock dividends, per share	$ 2,022	$ 2,022
U.S. Treasury preferred stock dividends, per share	$ 1,236	$ 2,500
Treasury Stock
Ending Balance, treasury stock	$ (869)	$ (1,021)
Ending Balance, compensation element of restricted stock	(67)	(55)
Ending Balance, noncontrolling interest	$ 131	$ 108