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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 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Currency Translation Adjustments       $ (25)
Derivative Financial Instruments 2 2 (15)  
Defined Benefit Plans            
Total 2 2 (15) (25)
Revenue [Member]
       
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Derivative Financial Instruments (4) (3) (25) (7)
Defined Benefit Plans            
Total (4) (3) (25) (7)
Cost of revenue [Member]
       
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Derivative Financial Instruments 6 7 5 8
Defined Benefit Plans            
Total 6 7 5 8
Other income (expense), net [Member]
       
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Currency Translation Adjustments       (25)
Defined Benefit Plans            
Total       (25)
Tax effect [Member]
       
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Derivative Financial Instruments   (2) 5 (1)
Defined Benefit Plans            
Total   $ (2) $ 5 $ (1)