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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, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Currency Translation Adjustments   $ (25)   $ (25)
Derivative Financial Instruments (10) 2 (17) (2)
Defined Benefit Plans            
Total (15) (23) (17) (27)
Revenue [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Derivative Financial Instruments (8) (2) (21) (4)
Defined Benefit Plans            
Total (17) (2) (21) (4)
Cost of revenue [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Derivative Financial Instruments (4) 4 (1) 1
Defined Benefit Plans            
Total (2) 4 (1) 1
Other income (expense), net [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Currency Translation Adjustments   (25)   (25)
Defined Benefit Plans            
Total   (25)   (25)
Tax effect [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Derivative Financial Instruments 2   5 1
Defined Benefit Plans            
Total $ 4   $ 5 $ 1