INCOME TAXES - Domestic and Foreign Earnings (Loss) Before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments [Abstract]
Domestic earnings (loss)									$ (268)	$ 556	$ 643
Foreign earnings									55	251	73
Earnings (loss) before income taxes	$ (13)	$ 102	$ 91	$ (393)	$ (114)	$ 240	$ 382	$ 299	$ (213)	$ 807	$ 716