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, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Basic:
Income attributable to common stock	$ 81	$ 63	$ 421	$ 848
Income (loss) attributable to common stock (in shares)	383	381	383	381
Basic net income (loss) per share (in USD per share)	$ 0.21	$ 0.16	$ 1.10	$ 2.23
Effect of Dilutive Securities:
Stock options and other (in shares)	2	2	2	2
Stock options and other (in USD per share)			$ (0.01)	$ (0.01)
Diluted:
Income attributable to common stock	$ 81	$ 63	$ 421	$ 848
Income (loss) attributable to common stock (in shares)	385	383	385	383
Diluted net income (loss) per share (in USD per share)	$ 0.21	$ 0.16	$ 1.09	$ 2.22