Accounts Receivable and Loans (Details 7) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012 Accounts	Jun. 30, 2011 Accounts	Jun. 30, 2012 Accounts	Jun. 30, 2011 Accounts
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Number of Accounts	7,000	15,000	17,000	31,000
Aggregated Outstanding Balances Upon Payment Default	$ 55	$ 108	$ 130	$ 230
Cardmember Loans [Member] | U S Card Services [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Number of Accounts	6,000	13,000	15,000	27,000
Aggregated Outstanding Balances Upon Payment Default	47	96	110	205
Cardmember Receivables [Member] | U S Card Services [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Number of Accounts	1,000	2,000	2,000	4,000
Aggregated Outstanding Balances Upon Payment Default	$ 8	$ 12	$ 20	$ 25