EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Income (Loss) attributable to common shareholders	$ 83	$ (1,619)	$ (1,518)	$ (4,039)
Weighted average common shares outstanding, basic (in shares)	1,967	529	1,012	528
Add incremental shares from assumed conversions:
Employee share-based compensation (in shares)	5	0	0	0
Equity Units (in shares)	168	0	0	0
Weighted average common shares outstanding, diluted (in shares)	2,140	529	1,012	528
Total Income (loss) per common share, diluted (in dollars per share)	$ 0.04	$ (3.06)	$ (1.50)	$ (7.65)