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Net Income (Loss) Attributable to Company Per Share - Computation of Weighted Average Basic and Diluted Shares Outstanding (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Numerator:
Net income (loss) attributable to Company	$ 24	$ (75)	$ (44)	$ (197)
Denominator:
Basic-weighted average common shares outstanding	378	377	377	377
Dilutive effect of employee stock options and other unvested stock awards	3
Diluted outstanding shares	381	377	377	377
Cash dividends per share	$ 0.05	$ 0.05	$ 0.10	$ 0.10
Basic	0.06	(0.20)	(0.12)	(0.52)
Diluted	$ 0.06	$ (0.20)	$ (0.12)	$ (0.52)

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Aggregate dividends paid during the period for each share of common stock outstanding.

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