Income Taxes (Components of Income Tax Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Federal, current	$ 782	$ 894	$ 669
State, current	227	191	158
Total current	1,009	1,085	827
Federal, deferred	307	123	(373)
State, deferred	44	55	(28)
Total deferred	351	178	(401)
Total	$ 1,360	$ 1,263	$ 426