Accounts Receivable and Loans (Details 4) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Impaired loans and receivables
Loans over 90 days past due and accruing interest	$ 236	$ 224
Non-accrual loans	198	248
Loans and receivables modified as a Troubled Debt Restructuring	367	428
Total impaired loans and receivables	801	900
Unpaid principal balance	738	842
Related allowance for Troubled Debt Restructurings	106	122
Accounts Receivable and Loans Textuals [Abstract]
Total loans and receivables modified as a TDR, non-accrual	94	92
Total loans and receivables modified as a TDR, past due 90 days and still accruing	23	26
U S Card Services [Member] | Card Member Loans [Member]
Impaired loans and receivables
Loans over 90 days past due and accruing interest	171	170
Non-accrual loans	198	244
Loans and receivables modified as a Troubled Debt Restructuring	323	373
Total impaired loans and receivables	692	787
Unpaid principal balance	631	731
Related allowance for Troubled Debt Restructurings	74	84
U S Card Services [Member] | Card Member 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	44	50
Total impaired loans and receivables	44	50
Unpaid principal balance	43	49
Related allowance for Troubled Debt Restructurings	32	38
International Card Services [Member] | Card Member Loans [Member]
Impaired loans and receivables
Loans over 90 days past due and accruing interest	65	54
Non-accrual loans	0	4
Loans and receivables modified as a Troubled Debt Restructuring	0	5
Total impaired loans and receivables	65	63
Unpaid principal balance	64	62
Related allowance for Troubled Debt Restructurings	$ 0	$ 0