EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Income (loss) attributable to common shareholders	$ (1,091)	$ 83	$ (574)	$ (1,518)
Income (loss) attributable to common shareholders	$ (1,091)	$ 83	$ (574)	$ (1,518)
Weighted average common shares outstanding, basic (in shares)	1,985	1,967	1,985	1,012
Add incremental shares from assumed conversions:
Employee share-based compensation (in shares)	0	5	0	0
Equity Units (in shares)	0	168	0	0
Weighted average common shares outstanding, diluted (in shares)	1,985	2,140	1,985	1,012
Total income (loss) per common share, diluted (in dollars per share)	$ (0.55)	$ 0.04	$ (0.29)	$ (1.50)