Summary of Funded Status of Pension Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Defined Benefit Plan, Accumulated Benefit Obligation	$ 811	$ 713
Assets for Plan Benefits, Defined Benefit Plan	(20)	(18)
Liability, Defined Benefit Plan, Current	(4)	(4)
Liability, Defined Benefit Plan, Noncurrent	(188)	(187)
Employee Benefit Plans [Abstract]
Benefit obligation at end of prior year	722	779
Service cost	5	6	$ 5
Interest cost	21	19	19
Actuarial loss	87	(32)
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	13	(24)
Benefit obligation at end of current year	821	722	779
Fair value of assets at end of prior year	549	614
Actual return on plan assets	91	(29)
Employer contributions	21	11
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	14	(21)
Net benefits paid	(26)	(26)
Fair value of assets at end of current year	649	549	614
Total unfunded status at end of year (recognized in other non-current liabilities in the Consolidated Balance Sheets)	(172)	(173)
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	30	33	30
Defined Benefit Plan Amortization Of Unrecognized Amounts	7	7	8
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	3	(1)	$ 2
Defined Benefit Plan, Benefit Obligation, Benefits Paid	27	26
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets	276	234
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation	$ 466	$ 423