Receivables (Details 6) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Receivables classified as Trouble Debt Restructuring Loans
Total	$ 753	$ 1,787
First lien [Member]
Receivables classified as Trouble Debt Restructuring Loans
Total	608	1,430
Second lien [Member]
Receivables classified as Trouble Debt Restructuring Loans
Total	70	155
Total real estate secured [Member]
Receivables classified as Trouble Debt Restructuring Loans
Total	678	1,585
Personal non-credit card [Member]
Receivables classified as Trouble Debt Restructuring Loans
Total	$ 75	$ 202