Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net (loss) income attributable to stockholders	$ (688)	$ 96
Net (loss) income attributable to stockholders, net of earnings allocated to participating securities	$ (688)	$ 96
Denominator:
Weighted average shares outstanding – basic	238	201
Unvested restricted shares		1
Weighted average shares outstanding – diluted	238	202
(Loss) earnings per share - Basic	$ (2.89)	$ 0.48
(Loss) earnings per share - Diluted	$ (2.89)	$ 0.48