Accounts Receivable and Loans (Details 5) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Interest Income Recognized And Average Balances Of Impaired Cardmember Loans And Receivables [Line Items]
Interest income recognized	$ 18	$ 18	$ 37	$ 38
Average balance of impaired loans	1,159	1,451	1,210	1,496
U S Card Services [Member] | Cardmember Loans [Member]
Interest Income Recognized And Average Balances Of Impaired Cardmember Loans And Receivables [Line Items]
Interest income recognized	14	14	29	30
Average balance of impaired loans	999	1,242	1,041	1,271
U S Card Services [Member] | Cardmember Receivables [Member]
Interest Income Recognized And Average Balances Of Impaired Cardmember Loans And Receivables [Line Items]
Interest income recognized	0	0	0	0
Average balance of impaired loans	91	133	100	147
International Card Services [Member] | Cardmember Loans [Member]
Interest Income Recognized And Average Balances Of Impaired Cardmember Loans And Receivables [Line Items]
Interest income recognized	4	4	8	8
Average balance of impaired loans	$ 69	$ 76	$ 69	$ 78