Income Taxes - Schedule of Income Tax Provision (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Current portion of income tax provision:
Federal	$ 0	$ 0	$ (1)	$ 0
State	(11)	(10)	(23)	(22)
Total current portion	(11)	(10)	(24)	(22)
Deferred portion of income tax provision:
Federal	(4)	(4)	(8)	(8)
State	(1)	(1)	(8)	(6)
Total deferred portion	(5)	(5)	(16)	(14)
Total provision for income taxes	$ (16)	$ (15)	$ (40)	$ (36)