Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current Income Taxes
Federal	$ 1	$ 3	$ (6)
State	(10)	16	8
Total current income taxes	(9)	19	2
Deferred Income Taxes
Federal	186	110	245
State	55	25	44
Total deferred income taxes	241	135	289
Total income tax expense	$ 232	$ 154	$ 291