Earnings Per Share ("EPS") - Computation of Basic and Diluted Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator:
Net income (loss) attributable to the Company	$ 20	$ (9)	$ 36	$ (49)
Less: net income attributable to participating securities			(1)
Net income (loss) attributable to the Company's stockholders	$ 20	$ (9)	$ 35	$ (49)
Denominator:
Weighted-average common shares outstanding, basic	108,402,136	107,752,427	108,252,926	107,695,277
Effect of dilutive securities	643,371		313,348
Weighted average diluted common shares outstanding	109,045,507	107,752,427	108,566,274	107,695,277
Basic	$ 0.18	$ (0.08)	$ 0.33	$ (0.45)
Diluted	$ 0.18	$ (0.08)	$ 0.33	$ (0.45)

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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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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Amount of undistributed earnings (loss) allocated to participating securities for the basic earnings (loss) per share or per unit calculation under the two-class method.

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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