INCOME TAXES - Income Tax Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Federal income tax at statutory rate	$ (984)	$ (214)	$ (90)
State income taxes	(236)	(52)	(20)
Permanent items	8	4	1
Nondeductible charitable contributions	172	0	0
Nondeductible loss on convertible debt	118	0	0
Nondeductible interest	0	0	8
Tax credits	(63)	(31)	(11)
Other	(3)	0	0
Valuation allowance	988	293	105
Tax credit limitation	0	0	7
Provision for income taxes	$ 0	$ 0	$ 0