Asset Quality (Details 8) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Summary of allowance for loan and lease losses
Balance at beginning of period - continuing operations	$ 944	$ 1,372	$ 1,004	$ 1,604
Charge-offs	(131)	(177)	(263)	(409)
Recoveries	54	43	85	82
Net loans charged off	(77)	(134)	(178)	(327)
Provision for loan and lease losses from continuing operations	21	(8)	63	(48)
Foreign currency translation adjustment			(1)	1
Balance at end of period - continuing operations	$ 888	$ 1,230	$ 888	$ 1,230