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Long-Term Employee Benefit Liabilities - Schedule of Company's Defined Benefit Pension Plans (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]    
Non-current asset $ (4) $ (22)
Non-current liability 729 677
Pension Plan, Defined Benefit [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Beginning of year 659 633
Current service cost 10 11
Interest cost 17 20
Actuarial losses and changes in actuarial assumptions 43 79
Benefits paid (23) (21)
Divestiture (68)
Foreign exchange 25 5
End of year 731 659
Beginning of year 478 406
Return on plan assets 42 78
Employer contributions 9 11
Benefits paid (18) (17)
Divestiture (10)
Foreign exchange 6 10
End of year 517 478
Ending funded status– Plan deficit 214 181
Non-current asset (4) (23)
Current liability 2 1
Non-current liability 216 203
Net amount 214 181
Unrecognized actuarial losses (158) (141)
Current service cost 10 11
Interest cost 17 20
Return on plan assets (21) (19)
Actuarial losses 5 4
Net periodic benefit cost $ 11 $ 16