EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Loss attributable to common shareholders	$ (2,553)	$ (984)	$ (2,420)	$ (542)
Weighted average common shares outstanding, basic (in shares)	529	516	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	516	528	517
Total loss per common share, diluted (in dollars per share)	$ (4.83)	$ (1.91)	$ (4.58)	$ (1.05)