Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Reducing In Tax Loss Carryforward Due To Realization Domestic And State Tax Loss	$ 2	$ 3
U.S. Federal statutory rate	35.00%
Income tax expense (benefit)	$ 70	0	$ 146
Transition Tax under Tax Cuts and Jobs Act (TCJA)	43	0	0
Provisional expense for deferred tax assets	46
Foreign earnings subject to U.S. federal income tax	(74)	(101)	12
Adjustment of prior years taxes	0	0	2
Valuation allowance	163	145
Unremitted earnings of foreign subsidiaries	920
Estimated income tax liability related to unremitted earnings of foreign subsidiaries	80
Uncertain tax positions that would affect the effective tax rate if recognized	108	108	110
Liability for interest on unrecognized tax benefits	4	4	4
Estimated decrease in unrecognized tax benefits related to the expiration of foreign statute of limitations and the conclusion of foreign income tax examinations that may occur within the coming year	8
Reducing in Tax Loss Carryforward Due To Realization Foreign Tax Loss	7	7
Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Penalties accrued	1	1	1
Accrued interest related to uncertain tax positions	1	1	1
Liability for penalties on unrecognized tax benefits	1	1	2
Domestic Tax Authority [Member]
Schedule of Equity Method Investments [Line Items]
Foreign earnings subject to U.S. federal income tax	(74)	$ (110)
Adjustment of prior years taxes			$ (15)
State and Local Jurisdiction [Member]
Schedule of Equity Method Investments [Line Items]
Cash payments for TCJA adjustment, one time transition tax	$ 1