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Accounts Receivable and Loans (Details) (USD $)
Mar. 31, 2012
Dec. 31, 2011
Mar. 31, 2011
Dec. 31, 2010
Accounts receivable segment information        
Cardmember receivables $ 41,507,000,000 $ 40,890,000,000    
Less: Cardmember reserve for losses 424,000,000 438,000,000 421,000,000 386,000,000
Cardmember receivables, net 41,083,000,000 40,452,000,000    
Other receivables, net 2,827,000,000 3,657,000,000    
Variable Interest Enterprise [Member]
       
Accounts receivable segment information        
Cardmember receivables 7,131,000,000 8,027,000,000    
Cardmember receivables, net 7,100,000,000 8,000,000,000    
Non United States [Member]
       
Accounts receivable segment information        
Cardmember receivables 13,100,000,000 12,800,000,000    
U S Card Services [Member]
       
Accounts receivable segment information        
Cardmember receivables 19,319,000,000 20,645,000,000    
Accounts Receivable and Loans Textuals [Abstract]        
Gross cardmember receivables available to settle the obligations of a variable interest entity 6,600,000,000 7,500,000,000    
International Card Services [Member]
       
Accounts receivable segment information        
Cardmember receivables 6,736,000,000 7,222,000,000    
Global Commercial Services [Member]
       
Accounts receivable segment information        
Cardmember receivables 15,298,000,000 12,829,000,000    
Global Commercial Services [Member] | Variable Interest Enterprise [Member]
       
Accounts Receivable and Loans Textuals [Abstract]        
Gross cardmember receivables available to settle the obligations of a variable interest entity 500,000,000 500,000,000    
Global Network And Merchant Services [Member]
       
Accounts receivable segment information        
Cardmember receivables $ 154,000,000 $ 194,000,000