INCOME TAXES - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Valuation of deferred tax assets	$ 1,458,000,000	$ 470,000,000
Increase in valuation allowance	$ (988,000,000)	(293,000,000)	$ (105,000,000)
Effective tax rate (as a percent)	0.00%
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, subject to expiration	$ 4,234,000,000
Tax credit carryforward	100,000,000
Uncertain tax positions	0	$ 0
United States
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	81,000,000
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 3,375,000,000