Loss Per Share ("EPS") - Computation of Basic and Diluted Loss Per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Numerator:
Net loss attributable to the Company's stockholders									$ (52)	$ (234)	$ (502)
Denominator:
Weighted-average common shares outstanding, basic	108,000,000	108,000,000	108,000,000	108,000,000	107,000,000	107,000,000	107,000,000	107,000,000	107,745,229	107,416,181	107,173,972
Effect of dilutive securities
Weighted-average common shares outstanding, diluted	108,000,000	108,000,000	108,000,000	108,000,000	107,000,000	107,000,000	107,000,000	107,000,000	107,745,229	107,416,181	107,173,972
Basic loss per common share	$ (0.03)	$ (0.08)	$ (0.16)	$ (0.21)	$ (0.66)	$ (0.53)	$ (0.40)	$ (0.59)	$ (0.48)	$ (2.18)	$ (4.68)
Diluted loss per common share	$ (0.03)	$ (0.08)	$ (0.16)	$ (0.21)	$ (0.66)	$ (0.53)	$ (0.40)	$ (0.59)	$ (0.48)	$ (2.18)	$ (4.68)