Accounts Receivable and Loans (Details 4) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Impaired loans and receivables
Loans over 90 days past due and accruing interest	$ 149	$ 132
Non-accrual loans	357	431
Loans and receivables modified as a Troubled Debt Restructuring	543	750
Total impaired loans and receivables	1,049	1,313
Unpaid principal balance	1,000	1,253
Related allowance for Troubled Debt Restructurings	187	244
Accounts Receivable and Loans (Textuals) [Abstract]
Total loans and receivables modified as a TDR, non-accrual	181	320
Total loans and receivables modified as a TDR, past due 90 days and still accruing	8	6
U S Card Services [Member] | Cardmember Loans [Member]
Impaired loans and receivables
Loans over 90 days past due and accruing interest	90	73
Non-accrual loans	353	426
Loans and receivables modified as a Troubled Debt Restructuring	469	627
Total impaired loans and receivables	912	1,126
Unpaid principal balance	869	1,073
Related allowance for Troubled Debt Restructurings	118	152
U S Card Services [Member] | Cardmember Receivables [Member]
Impaired loans and receivables
Loans over 90 days past due and accruing interest	0	0
Non-accrual loans	0	0
Loans and receivables modified as a Troubled Debt Restructuring	69	117
Total impaired loans and receivables	69	117
Unpaid principal balance	64	111
Related allowance for Troubled Debt Restructurings	68	91
International Card Services [Member] | Cardmember Loans [Member]
Impaired loans and receivables
Loans over 90 days past due and accruing interest	59	59
Non-accrual loans	4	5
Loans and receivables modified as a Troubled Debt Restructuring	5	6
Total impaired loans and receivables	68	70
Unpaid principal balance	67	69
Related allowance for Troubled Debt Restructurings	$ 1	$ 1