Income Taxes - Total income tax provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current taxes:
Federal	$ 218	$ 176	$ 192
State	11	9	10
Foreign	0	(1)	1
Deferred taxes:
Federal	8	37	22
Provision for income taxes as shown in the Statement of Earnings	$ 237	$ 221	$ 225