Accounts Receivable and Loans (Details 7) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 Account	Mar. 31, 2012 Account
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Number of Accounts	6,000	10,000
Aggregated Outstanding Balance Upon Payment Default	$ 60	$ 75
Cardmember Loans [Member] | U S Card Services [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Number of Accounts	5,000	9,000
Aggregated Outstanding Balance Upon Payment Default	48	63
Cardmember Receivables [Member] | U S Card Services [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Number of Accounts	1,000	1,000
Aggregated Outstanding Balance Upon Payment Default	$ 12	$ 12