Goodwill (Details Textual) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011		Jun. 30, 2011
Goodwill (Textual) [Abstract]
Goodwill	$ 2,228	[1]	$ 2,228	[1]	$ 2,626
Goodwill accumulated impairment losses	54
Goodwill allocated to retail branch disposal group	$ 94		$ 398

[1] The following table summarizes assets and liabilities related to variable interest entities ("VIEs") as of June 30, 2012 and December 31, 2011 which are consolidated on our balance sheet. Assets and liabilities exclude intercompany balances that eliminate in consolidation.