INCOME TAXES - Domestic and Foreign Earnings (Loss) Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments [Abstract]
Domestic earnings (loss)	$ 723	$ (268)	$ 556
Foreign earnings	259	55	251
Earnings (loss) before income taxes	$ 982	$ (213)	$ 807