Accounts Receivable and Loans (Details 7) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013 Account	Sep. 30, 2012 Account	Sep. 30, 2013 Account	Sep. 30, 2012 Account
Financing Receivable, Modifications [Line Items]
Number of Accounts	5,000,000	5,000,000	18,000,000	20,000,000
Aggregated Outstanding Balance Upon Payment Default	$ 45	$ 47	$ 171	$ 177
Card Member Loans [Member] | U S Card Services [Member]
Financing Receivable, Modifications [Line Items]
Number of Accounts	4,000,000	4,000,000	15,000,000	19,000,000
Aggregated Outstanding Balance Upon Payment Default	37	39	138	149
Card Member Receivables [Member] | U S Card Services [Member]
Financing Receivable, Modifications [Line Items]
Number of Accounts	1,000,000	1,000,000	3,000,000	1,000,000
Aggregated Outstanding Balance Upon Payment Default	$ 8	$ 8	$ 33	$ 28