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Accounts Receivable and Loans (Details) (USD $)
In Millions
Jun. 30, 2011
Dec. 31, 2010
Jun. 30, 2010
Dec. 31, 2009
Accounts receivable segment information        
Cardmember receivables, gross $ 40,143 $ 37,266    
Less: Cardmember reserve for losses 415 386 440 546
Cardmember receivables, net 39,728 36,880    
Other receivables, net 3,655 3,554    
Variable Interest Enterprise [Member] | U S Card Services [Member]
       
Accounts Receivable and Loans Textuals [Abstract]        
Gross cardmember receivables available to settle the obligations of a variable interest entity 7,000 7,700    
U S Card Services [Member]
       
Accounts receivable segment information        
Cardmember receivables, gross 19,249 19,155    
International Card Services [Member]
       
Accounts receivable segment information        
Cardmember receivables, gross 6,872 6,673    
Variable Interest Enterprise [Member] | Global Commercial Services [Member]
       
Accounts Receivable and Loans Textuals [Abstract]        
Gross cardmember receivables available to settle the obligations of a variable interest entity 500 500    
Global Commercial Services [Member]
       
Accounts receivable segment information        
Cardmember receivables, gross 13,814 11,259    
Global Network And Merchant Services [Member]
       
Accounts receivable segment information        
Cardmember receivables, gross 208 179    
Non United States [Member]
       
Accounts receivable segment information        
Cardmember receivables, gross 13,100 11,700    
Variable Interest Enterprise [Member]
       
Accounts Receivable and Loans Textuals [Abstract]        
Gross cardmember receivables available to settle the obligations of a variable interest entity $ 7,500 $ 8,192