Consolidated Balance Sheets (Unaudited) - (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Fixed maturities securities at amortized cost	$ 41,660	$ 41,032
Marketable securities fixed maturities allowance for credit loss	2	1
Equity securities at cost	708	703
Mortgage loans on real estate commercial and consumer allowance for credit loss	24	24
Allowance for uncollectible reinsurance	22	22
Allowance for uncollectible insurance receivables	29	29
Accumulated depreciation on property and equipment	289	280
Due from related parties	0	18
Due to related parties	$ 32	$ 26
Common stock, par value (in usd per share)	$ 2.50	$ 2.50
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	273,040,243	273,040,243
Common stock, shares outstanding (in shares)	270,852,335	270,895,902
Treasury stock, shares (in shares)	2,187,908	2,144,341