Pension Plans, Postretirement and Other Employee Benefits - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension Plans | U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 1	$ 1
Interest cost	21	10	15
Expected return on plan assets	(28)	(14)	(23)
Curtailment loss	0	0	0
Settlement loss	1	8	72
Net Amortization [Abstract]
Actuarial loss	5	5	8
Prior service cost (credit)	0	0	0
Net periodic costs	0	10	73
Pension Plans | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	14	9	8
Interest cost	15	13	14
Expected return on plan assets	(18)	(25)	(20)
Curtailment loss	0	0	0
Settlement loss	3	1	0
Net Amortization [Abstract]
Actuarial loss	6	9	7
Prior service cost (credit)	1	1	1
Net periodic costs	21	8	10
Other Postretirement Benefits Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0
Interest cost	8	5	6
Expected return on plan assets	0	0	0
Curtailment loss	1	0	0
Settlement loss	0	0	0
Net Amortization [Abstract]
Actuarial loss	5	4	5
Prior service cost (credit)	0	(1)	(1)
Net periodic costs	$ 14	$ 8	$ 10