Accounts Receivable and Loans (Details Textuals)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Average basis point reduction in interest rate by class of cardmember loans	13	13
Cardmember Receivables [Member] | U S Card Services [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Average payment term extension	12	15