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, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Basic:
Income (loss) from continuing operations									$ 1,304	$ (1,372)	$ (10,844)
Income (loss) from discontinued operations									0	(33)	492
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	$ 456	$ 63	$ 572	$ 213	$ (182)	$ (607)	$ (244)	$ (372)	$ 1,304	$ (1,405)	$ (10,352)
Weighted average number of shares outstanding, continuing operations, basic (in shares)									381	379	378
Weighted average number of shares outstanding, discontinued operations, basic (in shares)									381	379	378
Weighted average number of shares outstanding, basic (in shares)									381	379	378
Basic net income (loss) from continuing operations per share (in USD per share)									$ 3.42	$ (3.62)	$ (28.70)
Basic net income (loss) from discontinued operations per share (in USD per share)									0.00	(0.09)	1.30
Basic net income (loss) per share (in USD per share)	$ 1.20	$ 0.16	$ 1.50	$ 0.56					$ 3.42	$ (3.71)	$ (27.40)
Effect of Dilutive Securities:
Stock options and other, shares									2
Stock options and other, per share (in USD per share)									$ (0.01)
Diluted:
Income (loss) from continuing operations									$ 1,304	$ (1,372)	$ (10,844)
Income (loss) from discontinued operations									0	(33)	492
Income (loss) attributable to common stock									$ 1,304	$ (1,405)	$ (10,352)
Weighted average number of shares outstanding, continuing operations, diluted (in shares)									383	379	378
Weighted average number of shares outstanding, discontinued operations, diluted (in shares)									383	379	378
Weighted average number of shares outstanding, diluted (in shares)									383	379	378
Diluted net income (loss) from continuing operations per share (in USD per share)									$ 3.41	$ (3.62)	$ (28.70)
Diluted net income (loss) from discontinued operations per share (in USD per share)									0.00	(0.09)	1.30
Diluted net income (loss) per share (in USD per share)	$ 1.19	$ 0.16	$ 1.50	$ 0.56					$ 3.41	$ (3.71)	$ (27.40)