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Post-Employment and Other Long-Term Employees Benefits - Accumulated Other Comprehensive Income (Loss) Before Tax Effects (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]    
Other comprehensive loss, actuarial (gains)/losses, beginning balance $ 137 $ 152
Net amount generated/arising in current year, actuarial (gains)/losses 25 3
Amortization, actuarial (gains)/losses (14) (11)
Foreign currency translation, actuarial (gains)/losses before tax (9) (7)
Other comprehensive loss, actuarial (gains)/losses, ending balance 139 137
Other comprehensive loss, prior service cost, beginning balance 3 7
Net amount generated/arising in current year, prior service cost   (2)
Amortization, prior service cost (1) (1)
Foreign currency translation adjustment, prior service cost   (1)
Other comprehensive loss, prior service cost, ending balance 2 3
Other comprehensive loss, Total, beginning balance 140 159
Net amount generated/arising in current year, Total 25 1
Amortization, Total (15) (12)
Foreign currency translation adjustment, Total (9) (8)
Other comprehensive loss, Total, ending balance $ 141 $ 140