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Accumulated Other Comprehensive Income (Loss) - Components Of Amounts Reclassified From Accumulated Other Comprehensive Income Loss (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Currency Translation Adjustments $ (25)    $ (25)   
Derivative Financial Instruments 2 5 (2) 12
Defined Benefit Plans            
Total (23) 5 (27) 12
Revenue [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Currency Translation Adjustments            
Derivative Financial Instruments (2) 2 (4) 6
Defined Benefit Plans            
Total (2) 2 (4) 6
Cost of Revenue [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Currency Translation Adjustments            
Derivative Financial Instruments 4 5 1 11
Defined Benefit Plans            
Total 4 5 1 11
Other income (expense), net [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Currency Translation Adjustments (25)    (25)   
Derivative Financial Instruments            
Defined Benefit Plans            
Total (25)    (25)   
Tax Effects [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Currency Translation Adjustments            
Derivative Financial Instruments   (2) 1 (5)
Defined Benefit Plans            
Total   $ (2) $ 1 $ (5)