Deposits (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Deposits [Abstract]
Time deposits outstanding	$ 8,900,000,000	$ 9,030,000,000
Non-U.S. time deposits	2,560,000,000	2,210,000,000
The minimum amount of U.S. and non-U.S. time deposits	$ 100,000