Earnings (loss) Per Share ("EPS") - Computation of Basic and Diluted Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Numerator for basic and diluted net income (loss) per share attributable to the Company's stockholders:
Net income (loss) attributable to the Company	$ (19)	$ 27	$ (29)	$ 68
Less: net income (loss) attributable to nonvested shares			1
Net income (loss) attributable to the Company's stockholders	$ (19)	$ 27	$ (28)	$ 68
Denominator for basic earnings (loss) per share attributable to the Company's stockholders:
Weighted average common shares outstanding	107,178,567	107,053,082	107,147,086	107,053,058
Effect of dilutive securities:
Dilutive effect of stock-based compensation		497,263		456,550
Denominator for diluted earnings (loss) per share attributable to the Company's stockholders	107,178,567	107,550,345	107,147,086	107,509,608
Basic	$ (0.18)	$ 0.25	$ (0.27)	$ 0.64
Diluted	$ (0.18)	$ 0.25	$ (0.27)	$ 0.63