v2.4.0.6
Fair Values of Outstanding Derivative Instruments (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Derivative Assets    
Derivative Assets $ 337 $ 342
Derivative Liabilities    
Derivative Liabilities 6 8
Derivatives designated as hedging instruments | Foreign Exchange Contract | Prepaid revenue share, expenses and other assets, current and non-current
   
Derivative Assets    
Derivative Assets 333 342
Derivatives designated as hedging instruments | Foreign Exchange Contract | Accrued expenses and other current liabilities
   
Derivative Liabilities    
Derivative Liabilities 5 5
Derivatives not designated as hedging instruments | Foreign Exchange Contract | Prepaid revenue share, expenses and other assets, current
   
Derivative Assets    
Derivative Assets 4 0
Derivatives not designated as hedging instruments | Foreign Exchange Contract | Accrued expenses and other current liabilities
   
Derivative Liabilities    
Derivative Liabilities $ 1 $ 3