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Long-Term Employee Benefit Liabilities - Company's Retirement Medical Benefits Plans (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]    
Non-current liability $ 504 $ 559
Retirement Medical Benefits Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Beginning of year 41 36
Interest cost 1 2
Actuarial (gains) losses and changes in actuarial assumptions (7) 5
Benefits paid (2) (2)
Foreign exchange (1)  
Ending funded status 32 41
Current liability 2 2
Non-current liability 30 39
Net amount 32 41
Unrecognized past service costs 1 2
Unrecognized actuarial gains 11 4
Total amounts included in accumulated other comprehensive loss 12 6
Interest cost 1 2
Actuarial gains   (1)
Past service cost amortization (1) $ (1)
Net periodic benefit cost $ 1