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Asset Securitizations (Details Textuals) (USD $)
Jun. 30, 2011
Dec. 31, 2010
American Express Travel Related Services Company Inc [Member]
   
Securitized Trusts [Line Items]    
Subordinated securities owned $ 1,000,000,000  
American Express Charge Trust [Member]
   
Securitized Trusts [Line Items]    
Restricted cash held by Trusts 7,000,000 9,000,000
American Express Lending Trust [Member]
   
Securitized Trusts [Line Items]    
Restricted cash held by Trusts $ 297,000,000 $ 3,700,000,000