Customer Deposits (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
U.S.:
Interest-bearing	$ 32,510	$ 29,053
Non-interest-bearing	4	17
Non-U.S.:
Interest-bearing	621	640
Non-interest-bearing	7	17
Total customer deposits	$ 33,142	$ 29,727