INCOME TAXES - Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Loss before income taxes
United States	$ (4,590)	$ (1,021)	$ (427)
Foreign	(98)	3	1
Loss before income taxes	$ (4,688)	$ (1,018)	$ (426)