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Accounts Receivable and Loans (Details 7) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Accounts
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]  
Number of Accounts 52,000
Outstanding Balance Upon Payment Default $ 388
Cardmember Loans [Member] | U S Card Services [Member]
  
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]  
Number of Accounts 46,000
Outstanding Balance Upon Payment Default 343
Cardmember Receivables [Member] | U S Card Services [Member]
  
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]  
Number of Accounts 6,000
Outstanding Balance Upon Payment Default $ 45