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Derivative Financial Instruments - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]    
Net positive exposure related to corporate derivatives $ 83,000,000 $ 79,000,000
Euro and British Pound Sterling denominated bonds outstanding in securitization trusts 10,700,000,000  
Interest rate swaps entered into by the trusts to swap Prime to LIBOR 12,800,000,000  
Net positive exposure on foreign currency swaps 968,000,000  
Amount guaranteed by French government on French net positive exposure on foreign currency swaps 577,000,000  
Notional amount of cross-currency interest rate swaps causing exposure 5,100,000,000  
Decrease in derivative asset value as a result of derivatives with French institutions 63,000,000  
Basis swap terms 13 years and are primarily indexed to LIBOR or Prime rates  
Maximum term of basis swap (in years) 13 years  
Decrease in valuation due to net credit risk adjustment 91,000,000 111,000,000
Decrease in valuation due to liquidity adjustments 84,000,000 107,000,000
Derivative liability position including accrued interest, net of premium receivable with counterparty 762,000,000  
Liability position with derivative counterparties 148,000,000  
Collateral posted to counterparties 148,000,000  
France [Member]
   
Derivative Instruments, Gain (Loss) [Line Items]    
Net positive exposure on foreign currency swaps 772,000,000  
Notional amount of cross-currency interest rate swaps causing exposure $ 3,400,000,000