SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Net loss from continuing operations	$ 202	$ 292	$ (229)	$ (4,097)	$ (4,090)	$ (3,815)	$ (1,828)	$ (2,447)	$ (3,832)	$ (12,180)	$ (1,022)
Net income from continuing operations attributable to noncontrolling interests									(227)	(27)	(358)
Gain on redemption and preferred dividends attributable to noncontrolling interests									161	(41)	(40)
Accumulated dividends on participating securities									(3)	(3)	(3)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent									(3,901)	(12,251)	(1,423)
Net (loss) income from discontinued operations	(2)	(6)	(181)	(4)	(4)	25	29	41	(193)	91	277
Net income from discontinued operations attributable to noncontrolling interests	$ (19)	$ (22)	$ (12)	$ (10)	$ (11)	$ (16)	$ (26)	$ (26)	(63)	(79)	(165)
Net (loss) income from discontinued operations attributable to common stockholders									(256)	12	112
Net Income (Loss) Available to Common Stockholders, Diluted									$ (4,157)	$ (12,239)	$ (1,311)
Basic and diluted weighted-average shares of common stock outstanding (in shares)									1,318	1,082	1,039
Basic and diluted net (loss) income per share attributable to common stockholders:
Continuing operations (in dollars per share)	$ 0.22	$ 0.18	$ (0.23)	$ (3.34)	$ (3.46)	$ (3.59)	$ (1.78)	$ (2.40)	$ (2.96)	$ (11.32)	$ (1.37)
Discontinued operations (in dollars per share)	(0.01)	(0.02)	(0.15)	(0.01)	(0.01)	0.01	0.00	0.02	(0.20)	0.01	0.11
Earnings per share, basic and diluted (in dollars per share)	$ 0.21	$ 0.16	$ (0.38)	$ (3.35)	$ (3.47)	$ (3.58)	$ (1.78)	$ (2.38)	$ (3.16)	$ (11.31)	$ (1.26)
Potential anti-dilutive securities									12	9	10
Outstanding options with exercise prices greater than market price of common stock									46	45	31