Receivables (Details 4) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Trouble debt restructuring modification
Total	$ 945	$ 2,572
First lien [Member]
Trouble debt restructuring modification
Total	780	2,048
Second lien [Member]
Trouble debt restructuring modification
Total	70	258
Total real estate secured [Member]
Trouble debt restructuring modification
Total	850	2,306
Personal non-credit card [Member]
Trouble debt restructuring modification
Total	$ 95	$ 266