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Accounts Receivable and Loans (Details 6) (U S Card Services [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Account
Mar. 31, 2013
Account
Financing Receivable, Modifications [Line Items]    
Number of Accounts 3,000 6,000
Aggregated Outstanding Balance Upon Payment Default $ 27 $ 60
Card Member Loans [Member]
   
Financing Receivable, Modifications [Line Items]    
Number of Accounts 2,000 5,000
Aggregated Outstanding Balance Upon Payment Default 20 48
Card Member Receivables [Member]
   
Financing Receivable, Modifications [Line Items]    
Number of Accounts 1,000 1,000
Aggregated Outstanding Balance Upon Payment Default $ 7 $ 12