Accounts Receivable and Loans (Details 2) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
U S Card Services [Member] | Card Member Loans [Member]
Financing receivable recorded investment aging
Current	$ 57,181	$ 57,772
30 to 59 days past due	155	183
60 to 89 days past due	116	134
90+ days past due	275	306
Total aging	57,727	58,395
U S Card Services [Member] | Card Member Receivables [Member]
Financing receivable recorded investment aging
Current	20,915	21,488
30 to 59 days past due	111	125
60 to 89 days past due	59	69
90+ days past due	153	160
Total aging	21,238	21,842
International Card Services [Member] | Card Member Loans [Member]
Financing receivable recorded investment aging
Current	8,415	8,664
30 to 59 days past due	45	43
60 to 89 days past due	30	28
90+ days past due	65	55
Total aging	8,555	8,790
International Card Services [Member] | Card Member Receivables [Member]
Financing receivable recorded investment aging
Current	7,356
30 to 59 days past due	32
60 to 89 days past due	19
90+ days past due	50	83
Total aging	7,457	7,771
Global Commercial Services [Member] | Card Member Receivables [Member]
Financing receivable recorded investment aging
90+ days past due	119	132
Total aging	$ 16,460	$ 14,391