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Accumulated Other Comprehensive Income (Loss) - Components of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Revenue $ 2,154 $ 1,835 $ 6,055 $ 5,335
Cost of revenue (1,761) (1,550) (5,020) (4,610)
Other income (expense), net (20) (16) (70) (36)
Tax effect (29) 13 (37) 43
Net income (loss) 1 (26) (43) (223)
Reclassification out of Accumulated Other Comprehensive Income [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Revenue 1 (2)   (6)
Cost of revenue 2 4 (3) 8
Other income (expense), net 6   6  
Tax effect (1) (1) 1 1
Net income (loss) 8 1 4 3
Currency Translation Adjustments [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Other income (expense), net 6   6  
Net income (loss) 6   6  
Derivative Financial Instruments, Net of Tax [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Revenue 1 (2)   (6)
Cost of revenue 2 4 (3) 8
Tax effect (1) (1) 1 1
Net income (loss) $ 2 $ 1 $ (2) $ 3