Employee Benefit Plans - Schedule of Pension and Postemployment Benefit Costs (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 7	$ 8	$ 9
Interest cost	3	3	3
Expected return on plan assets	(2)	(2)	(2)
Curtailment charge	0	(1)	0
Amortization of actuarial loss	1	1	1
Amortization of prior service (credit) cost	0	0	(1)
Total costs	9	9	10
Postemployment
Defined Benefit Plan Disclosure [Line Items]
Service cost	11	8	7
Interest cost	1	1	1
Expected return on plan assets	0	0	0
Curtailment charge	0	0	0
Amortization of actuarial loss	5	4	2
Amortization of prior service (credit) cost	0	0	1
Total costs	$ 17	$ 13	$ 11