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Commitments and Contingencies (Details Textuals) (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2007
Component of Operating Other Cost and Expense [Line Items]        
Total rental expense $ 280,000,000 $ 250,000,000 $ 362,000,000  
Aggregate maximum payments received by the company 4,050,000,000      
Commitments And Contingencies (Textuals) [Abstract]        
Range of possible loss, minimum 0      
Range of possible loss, maximum 510,000,000      
Contingent Obligations Co Brand Partners 5,300,000,000      
Amount of rentals subject to subleasing arrangements 27,000,000      
Future minimum payments on capital leases due, in 2012 11,000,000      
Future minimum payments on capital leases due, in 2013 11,000,000      
Future minimum payments on capital leases due, in 2014 12,000,000      
Future minimum payments on capital leases due, in 2015 5,000,000      
Future minimum payments on capital leases due, in 2016 5,000,000      
Future minimum payments on capital leases due, thereafter 29,000,000      
Lease Termination Penalties [Member]
        
Component of Operating Other Cost and Expense [Line Items]        
Total rental expense     36,000,000  
Visa [Member]
        
Component of Operating Other Cost and Expense [Line Items]        
Aggregate maximum payments received by the company       1,130,000,000
After tax settlement       700,000,000
Pretax quarterly payments 280,000,000 280,000,000 280,000,000  
After tax quarterly payments 172,000,000 172,000,000 172,000,000  
Mastercard [Member]
        
Component of Operating Other Cost and Expense [Line Items]        
Pretax quarterly payments 300,000,000 600,000,000 600,000,000  
After tax quarterly payments $ 186,000,000 $ 372,000,000 $ 372,000,000