Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Federal
Current	$ 180	$ 397
Deferred	133	(32)
Federal income tax	313	365
State
Current	21	96
Deferred	13	(6)
State income tax	34	90
Total income tax provision	$ 347	$ 455