INCOME TAXES - Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 21	$ (69)	$ 10
State	1	(5)	0
Foreign	10	61	82
Total current	32	(13)	92
Deferred:
Federal	(137)	45	61
State	(31)	12	(18)
Foreign	(1)	15	(1)
Total deferred	(169)	72	42
Total income tax provision (benefit)	$ (137)	$ 59	$ 134