Income Taxes (Details) - Effective Tax Rate - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
U.S. income before income taxes	$ 3,101	$ 4,107	$ 3,095
Foreign income before income taxes	253	351	142
Income before income taxes	$ 3,354	$ 4,458	$ 3,237
Statutory tax rate (percent)	21.00%	21.00%	21.00%
Expected federal income tax expense	$ 704	$ 936	$ 680
Tax effect of nontaxable investment income	(149)	(147)	(147)
Tax effect of audit reserve	(40)	1	15
Tax effect of other, net	(3)	6	(8)
Total income tax expense included in the consolidated statement of income	$ 512	$ 796	$ 540
Effective tax rate (percent)	15.00%	18.00%	17.00%
Income taxes paid	$ 817	$ 707	$ 578
Current income tax receivable	$ 32
Current income tax payable		$ 119