Accounts Receivable and Loans (Details 2) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
U S Card Services [Member] | Cardmember Loans [Member]
Financing receivable recorded investment aging
Current	$ 54,063	$ 55,281
30 to 59 days past due	170	200
60 to 89 days past due	120	147
90+ days past due	292	325
Total aging	54,645	55,953
U S Card Services [Member] | Cardmember Receivables [Member]
Financing receivable recorded investment aging
Current	20,520	20,748
30 to 59 days past due	117	116
60 to 89 days past due	68	76
90+ days past due	156	184
Total aging	20,861	21,124
International Card Services [Member] | Cardmember Loans [Member]
Financing receivable recorded investment aging
Current	8,251	9,099
30 to 59 days past due	45	47
60 to 89 days past due	28	30
90+ days past due	60	60
Total aging	8,384	9,236
International Card Services [Member] | Cardmember Receivables [Member]
Financing receivable recorded investment aging
90+ days past due	79	74
Total aging	7,153	7,778
Global Commercial Services [Member] | Cardmember Receivables [Member]
Financing receivable recorded investment aging
90+ days past due	116	112
Total aging	$ 15,893	$ 13,671