INCOME TAXES - Schedule of Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current provision (benefit) for income taxes:
Federal	$ 5	$ 6	$ (78)
State	(5)	3	2
Current income tax expense (benefit)	0	9	(76)
Deferred (benefit) provision for income taxes:
Federal	(342)	868	(93)
State	(16)	36	(4)
Deferred income tax expense (benefit)	(358)	904	(97)
(Benefit) provision for income taxes	$ (358)	$ 913	$ (173)