CAPITAL STOCK - Net Income Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Basic:
Income (loss) from continuing operations									$ 40	$ 1,304	$ (1,372)
Income (loss) from discontinued operations									0	0	(33)
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	$ (381)	$ 81	$ 195	$ 145	$ 456	$ 63	$ 572	$ 213	$ 40	$ 1,304	$ (1,405)
Weighted average number of shares outstanding, continuing operations, basic (in shares)									382	381	379
Weighted average number of shares outstanding, discontinued operations, basic (in shares)									382	381	379
Weighted average number of shares outstanding, basic (in shares)									382	381	379
Basic net income (loss) from continuing operations per share (in USD per share)									$ 0.11	$ 3.42	$ (3.62)
Basic net loss from discontinued operations per share (in USD per share)									0.00	0.00	(0.09)
Basic net income (loss) per share (in USD per share)	$ (1.00)	$ 0.21	$ 0.51	$ 0.38	$ 1.20	$ 0.16	$ 1.50	$ 0.56	$ 0.11	$ 3.42	$ (3.71)
Effect of Dilutive Securities:
Stock options and other, shares (in shares)									2	2	0
Stock options and other, per share (in USD per share)									$ 0.00	$ (0.01)	$ 0.00
Diluted:
Income (loss) from continuing operations									$ 40	$ 1,304	$ (1,372)
Income (loss) from discontinued operations									0	0	(33)
Income (loss) attributable to common stock									$ 40	$ 1,304	$ (1,405)
Weighted average number of shares outstanding, continuing operations, diluted (in shares)									384	383	379
Weighted average number of shares outstanding, discontinued operations, diluted (in shares)									384	383	379
Weighted average number of shares outstanding, diluted (in shares)									384	383	379
Diluted net income (loss) from continuing operations per share (in USD per share)									$ 0.11	$ 3.41	$ (3.62)
Diluted net loss from discontinued operations per share (in USD per share)									0.00	0.00	(0.09)
Diluted net income (loss) per share (in USD per share)	$ (1.00)	$ 0.21	$ 0.51	$ 0.38	$ 1.19	$ 0.16	$ 1.50	$ 0.56	$ 0.11	$ 3.41	$ (3.71)