Annual report pursuant to Section 13 and 15(d)

Fair Values of Derivative Assets and Liabilities by Hedge Type (Detail)

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Fair Values of Derivative Assets and Liabilities by Hedge Type (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Asset Derivatives    
Total Asset Derivatives $ 649 $ 218
Liability Derivatives    
Total Liability Derivatives 208 141
Foreign exchange contracts
    
Asset Derivatives    
Total Asset Derivatives 166 36
Liability Derivatives    
Total Liability Derivatives 185 111
Interest rate contracts
    
Asset Derivatives    
Total Asset Derivatives 483 182
Liability Derivatives    
Total Liability Derivatives 23 30
Fair Value, Inputs, Level 2
    
Asset Derivatives    
Total Asset Derivatives 649 218
Liability Derivatives    
Total Liability Derivatives 208 141
Fair Value, Inputs, Level 2 | Foreign exchange contracts
    
Asset Derivatives    
Total Asset Derivatives 166 36
Liability Derivatives    
Total Liability Derivatives 185 111
Fair Value, Inputs, Level 2 | Interest rate contracts
    
Asset Derivatives    
Total Asset Derivatives 483 182
Liability Derivatives    
Total Liability Derivatives $ 23 $ 30