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Earnings Per Share ("EPS") - Computation of Basic and Diluted Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Numerator:
Net income (loss) attributable to the Company	$ 16	$ 20	$ 14	$ 2	$ (3)	$ (9)	$ (17)	$ (23)	$ 52	$ (52)	$ (234)
Less: net income attributable to participating securities									(1)
Net income (loss) attributable to the Company's stockholders									$ 51	$ (52)	$ (234)
Denominator:
Weighted-average common shares outstanding, basic									108,296,155	107,745,229	107,416,181
Effect of dilutive securities									341,489
Weighted-average diluted common shares outstanding									108,637,644	107,745,229	107,416,181
Basic	$ 0.14	$ 0.18	$ 0.12	$ 0.02	$ (0.03)	$ (0.08)	$ (0.16)	$ (0.21)	$ 0.47	$ (0.48)	$ (2.18)
Diluted	$ 0.14	$ 0.18	$ 0.12	$ 0.02	$ (0.03)	$ (0.08)	$ (0.16)	$ (0.21)	$ 0.47	$ (0.48)	$ (2.18)

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- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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