Income Taxes - Components of Income Tax Expense (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Federal
Current	$ 397	$ 404
Deferred	(32)	(102)
Federal income tax	365	302
State
Current	96	89
Deferred	(6)	6
State income tax	90	95
Applicable income taxes	$ 455	$ 397