Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Federal
Current	$ 321	$ 263	$ 501	$ 660
Deferred	49	33	182	1
Federal income tax	370	296	683	661
State
Current	88	119	109	215
Deferred	(13)	(33)	0	(39)
State income tax	75	86	109	176
Total income tax provision	$ 445	$ 382	$ 792	$ 837