Income Taxes - Income Tax Provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current:
Federal	$ 2,819	$ 2,803	$ 2,285
State	662	735	665
Total current taxes	3,481	3,538	2,950
Deferred:
Federal	(537)	(1,526)	(282)
State	(139)	(503)	(120)
Total deferred income taxes	(676)	(2,029)	(402)
Total	$ 2,805	$ 1,509	$ 2,548