Stockholders' Equity and Equity-Based Incentive Plans - Components of Accumulated Other Comprehensive Income (Loss) Reclassified (Detail) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		$ 675	$ 823	$ 1,838	$ 1,789	$ 823	$ 1,789
Net current period other comprehensive income		(16)	(58)	(23)	(1)
Ending Balance		537	675	3,566	1,838	537	3,566
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			(73)		(49)	(73)	(49)
Other comprehensive income before reclassification						(34)	(12)
Net current period other comprehensive income						(34)	(12)
Ending Balance		(107)		(61)		(107)	(61)
Net Unrealized Loss on Derivative Financial Instruments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	[1]		(40)		(2)	(40)	(2)
Other comprehensive income before reclassification	[1]					(47)	(15)
Amounts reclassified from AOCI	[1],[2]					7	3
Net current period other comprehensive income	[1]					(40)	(12)
Ending Balance	[1]	(80)		(14)		(80)	(14)
Defined Benefit Pension and Other Postretirement Plans [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			6			6
Ending Balance		6				6
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(165)	(107)	(52)	(51)	(107)	(51)
Other comprehensive income before reclassification						(81)	(27)
Amounts reclassified from AOCI	[2]					7	3
Net current period other comprehensive income		(16)	(58)	(23)	(1)	(74)	(24)
Ending Balance		$ (181)	$ (165)	$ (75)	$ (52)	$ (181)	$ (75)

[1] Refer to Note 17, Derivative Financial Instruments, for additional details.

[2] Amounts are net of tax, which was not material during the six months ended June 30, 2019 and 2018.