SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Net income (loss) from continuing operations	$ 865	$ (192)	$ 2,909
Net income from continuing operations attributable to noncontrolling interests	(266)	(50)	(292)
Accumulated dividends and undistributed earnings allocated to participating securities	(3)	(3)	(4)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	596	(245)	2,613
Net income (loss) from discontinued operations	0	3	(15)
Net Income (Loss) Available to Common Stockholders, Diluted	$ 596	$ (242)	$ 2,598
Weighted Average Number of Shares Outstanding, Basic	1,453	1,451	1,449
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	8	0	9
Weighted Average Number of Shares Outstanding, Diluted	1,461	1,451	1,458
Basic net income (loss) per share attributable to common stockholders:
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.41	$ (0.17)	$ 1.80
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	0	(0.01)
Earnings per share, basic (in dollars per share)	0.41	(0.17)	1.79
Diluted net income (loss) per share attributable to common stockholders:
Income (Loss) from Continuing Operations, Per Diluted Share	0.41	(0.17)	1.79
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share			(0.01)
Earnings Per Share, Diluted	$ 0.41	$ (0.17)	$ 1.78
Potential anti-dilutive securities		11	1
Outstanding options with exercise prices greater than market price of common stock	31	42	37