Stockholders' Equity and Equity-Based Incentive Plans - Components of Accumulated Other Comprehensive Income (Loss) included in Stockholders' Equity (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Stockholders Equity Note [Abstract]
Foreign currency translation adjustments ("CTA")	$ (61)	$ (49)
Net unrealized loss on derivative financial instruments	(14)	(2)
Accumulated other comprehensive loss	$ (75)	$ (51)