CAPITAL STOCK - Net Income (loss) Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Basic:
Income (loss) attributable to common stock	$ (170)	$ 81	$ (577)	$ 421
Income (loss) attributable to common stock, shares	377	383	377	383
Basic net income (loss) per share (in USD per share)	$ (0.45)	$ 0.21	$ (1.53)	$ 1.10
Effect of Dilutive Securities:
Stock options and other (in shares)	0	2	0	2
Stock options and other (in USD per share)				$ (0.01)
Diluted:
Income (loss) attributable to common stock	$ (170)	$ 81	$ (577)	$ 421
Income (loss) attributable to common stock, shares	377	385	377	385
Diluted net income (loss) per share (in USD per share)	$ (0.45)	$ 0.21	$ (1.53)	$ 1.09