Accounts Receivable and Loans (Details 6) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013 Account	Jun. 30, 2012 Account	Jun. 30, 2013 Account	Jun. 30, 2012 Account
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Number of Accounts	16,000	32,000	47,000	75,000
Pre-Modification Outstanding Balance	$ 145	$ 272	$ 421	$ 629
Post-Modification Outstanding Balance	145	266	417	614
Cardmember Loans [Member] | U S Card Services [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Number of Accounts	12,000	24,000	35,000	56,000
Pre-Modification Outstanding Balance	94	178	267	407
Post-Modification Outstanding Balance	94	173	264	396
Cardmember Receivables [Member] | U S Card Services [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Number of Accounts	4,000	8,000	12,000	19,000
Pre-Modification Outstanding Balance	51	94	154	222
Post-Modification Outstanding Balance	$ 51	$ 93	$ 153	$ 218