CAPITAL STOCK - Net Income (loss) Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Basic:
Income (loss) attributable to common stock	$ (360)	$ 195	$ (407)	$ 340
Income (loss) attributable to common stock, shares	377	382	376	382
Basic net income (loss) per share (in USD per share)	$ (0.96)	$ 0.51	$ (1.08)	$ 0.89
Effect of Dilutive Securities:
Stock options and other (in shares)		3		2
Stock options and other (in USD per share)				$ (0.01)
Diluted:
Income (loss) attributable to common stock	$ (360)	$ 195	$ (407)	$ 340
Income (loss) attributable to common stock, shares	377	385	376	384
Diluted net income (loss) per share (in USD per share)	$ (0.96)	$ 0.51	$ (1.08)	$ 0.88