EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Income (loss) attributable to common shareholders	$ 397	$ (1,972)	$ 517	$ (1,601)
Income (loss) attributable to common shareholders	$ 397	$ (1,972)	$ 517	$ (1,601)
Weighted average common shares outstanding, basic (in shares)	1,985	529	1,985	529
Add incremental shares from assumed conversions:
Employee share-based compensation (in shares)	5	0	5	0
Equity Units (in shares)	156	0	156	0
Weighted average common shares outstanding, diluted (in shares)	2,146	529	2,146	529
Total income (loss) per common share, diluted (in dollars per share)	$ 0.18	$ (3.73)	$ 0.24	$ (3.03)