Accounts Receivable and Loans (Details 7) (U S Card Services [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014 Account	Jun. 30, 2013 Account	Jun. 30, 2014 Account	Jun. 30, 2013 Account
Financing Receivable, Modifications [Line Items]
Number of Accounts	3,000	7,000	6,000	13,000
Aggregated Outstanding Balance Upon Payment Default	$ 31	$ 66	$ 58	$ 126
Card Member Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Accounts	2,000	6,000	4,000	11,000
Aggregated Outstanding Balance Upon Payment Default	20	53	40	101
Card Member Receivables [Member]
Financing Receivable, Modifications [Line Items]
Number of Accounts	1,000	1,000	2,000	2,000
Aggregated Outstanding Balance Upon Payment Default	$ 11	$ 13	$ 18	$ 25