Income Taxes - Components of Income Tax (Benefit) Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Federal
Current	$ 87	$ 7	$ 838
Deferred	(251)	(2)	(332)
State
Current	(29)	(6)	283
Deferred	15	55	(191)
Foreign
Current	2	0	32
Deferred	1	7	(73)
Total income tax (benefit) expense	(175)	61	557
Income tax (benefit) expense in the consolidated statements of operations:
Income tax (benefit) expense	(175)	61	557
Stockholders' equity:
Tax effect of the change in accumulated other comprehensive loss	$ 26	$ (21)	$ 297