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, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Basic:
Income attributable to common stock	$ 195	$ 572	$ 340	$ 785
Income (loss) attributable to common stock (in shares)	382	381	382	380
Basic net income (loss) per share (in USD per share)	$ 0.51	$ 1.50	$ 0.89	$ 2.06
Effect of Dilutive Securities:
Stock options and other (in shares)	3	2	2	3
Stock options and other (in USD per share)			$ (0.01)	$ (0.01)
Diluted:
Income attributable to common stock	$ 195	$ 572	$ 340	$ 785
Income (loss) attributable to common stock (in shares)	385	383	384	383
Diluted net income (loss) per share (in USD per share)	$ 0.51	$ 1.50	$ 0.88	$ 2.05