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Receivables - Additional Information (Detail) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Disclosure Receivables Additional Information [Abstract]    
Deferred origination fees $ 221,000,000 $ 254,000,000
Net unamortized premium on our receivables 127,000,000 169,000,000
Unearned income on personal non-credit card receivables   8,000,000
Secured financing 2,900,000,000 3,300,000,000
Receivables, collateralizing long-term debt $ 4,900,000,000 $ 5,300,000,000