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Accounts Receivable and Loans (Details 1) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Loans segment information        
Cardmember loans $ 65,229,000,000 $ 62,621,000,000    
Less: Reserve for losses 1,471,000,000 1,874,000,000 3,646,000,000 5,799,000,000
Cardmember loans, net 63,758,000,000 60,747,000,000    
Other loans, net 551,000,000 419,000,000    
Accounts Receivable and Loans Textuals [Abstract]        
Other loans, reserves 20,000,000 18,000,000    
Variable Interest Enterprise [Member]
       
Loans segment information        
Cardmember loans 32,731,000,000 33,834,000,000    
U S Card Services [Member]
       
Loans segment information        
Cardmember loans 55,953,000,000 53,686,000,000    
U S Card Services [Member] | Variable Interest Enterprise [Member]
       
Accounts Receivable and Loans Textuals [Abstract]        
Gross cardmember loans available to settle the obligations of a variable interest entity 32,700,000,000 33,800,000,000    
International Card Services [Member]
       
Loans segment information        
Cardmember loans 9,236,000,000 8,901,000,000    
Global Commercial Services [Member]
       
Loans segment information        
Cardmember loans $ 40,000,000 $ 34,000,000