EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Income (Loss) attributable to common shareholders	$ (1,619)	$ 564	$ (4,039)	$ 22
Weighted average common shares outstanding, basic (in shares)	529	517	528	516
Add incremental shares from assumed conversions:
Employee share-based compensation (in shares)	0	0	0	1
Weighted average common shares outstanding, diluted (in shares)	529	517	528	517
Total income (loss) per common share, diluted (in dollars per share)	$ (3.06)	$ 1.09	$ (7.65)	$ 0.04