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Long-Term Employee Benefit Liabilities - Schedule of Company's Defined Benefit Pension Plans (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Defined Benefit Plan Disclosure [Line Items]    
Non-current asset $ (23) $ (21)
Non-current liability 670 667
Pension Plan, Defined Benefit [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Beginning of year 624 493
Current service cost 13 14
Interest cost 18 21
Actuarial losses and changes in actuarial assumptions 8 28
Benefits paid (23) (22)
Benefits paid - settlements   (32)
Acquisition   129
Gain on settlement   (5)
Foreign exchange 47 (2)
End of year 687 624
Beginning of year 330 326
Return on plan assets 33 22
Employer contributions 82 19
Benefits paid (18) (17)
Benefits paid - settlements   (32)
Acquisition   8
Foreign exchange 16 4
End of year 443 330
Ending funded status 244 294
Non-current asset (23) (21)
Current liability 3 2
Non-current liability 264 313
Net amount 244 294
Unrecognized actuarial losses (135) (144)
Current service cost 13 14
Interest cost 18 21
Return on plan assets (20) (20)
Benefits paid - settlements   13
Actuarial losses 4 3
Net periodic benefit cost $ 15 $ 31