Income Taxes - Total income tax provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current taxes:
Federal	$ 192	$ 162	$ 46
State	10	7	4
Foreign	1	1	3
Deferred taxes:
Federal	22	84	(28)
Provision for income taxes as shown in the Statement of Earnings	$ 225	$ 254	$ 25