Non-Interest Revenue and Expense Detail (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Details Of Certain Statements Of Income Lines Details [Abstract]
Foreign currency conversion fee revenue	$ 213	$ 210
Delinquency fees	181	164
Loyalty Partner	91	75
Service fees	90	82
Other commissions and fees	43	42
Total other commissions and fees	$ 618	$ 573