Accounts Receivable and Loans (Details 6) (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	16,000,000	35,000,000	63,000,000	110,000,000
Pre-Modification Outstanding Balance	$ 140	$ 297	$ 561	$ 926
Post-Modification Outstanding Balance	140	293	557	907
Card Member Loans [Member] | U S Card Services [Member]
Financing Receivable, Modifications [Line Items]
Number of Accounts	12,000,000	26,000,000	47,000,000	82,000,000
Pre-Modification Outstanding Balance	91	193	357	600
Post-Modification Outstanding Balance	91	190	355	587
Card Member Receivables [Member] | U S Card Services [Member]
Financing Receivable, Modifications [Line Items]
Number of Accounts	4,000,000	9,000,000	16,000,000	28,000,000
Pre-Modification Outstanding Balance	49	104	204	326
Post-Modification Outstanding Balance	$ 49	$ 103	$ 202	$ 320