INCOME TAXES - Total Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current income taxes:
Federal	$ 1	$ (1)	$ (38)
State	0	0	(8)
Foreign	659	895	641
Total current income taxes	660	894	595
Deferred income taxes:
Federal	67	(65)	(1,010)
State	0	2	0
Foreign	(53)	(159)	(170)
Total deferred income taxes	14	(222)	(1,180)
Total	$ 674	$ 672	$ (585)