Condensed Consolidated Balance Sheets - (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Fixed maturities securities at amortized cost	$ 40,928	$ 39,952
Marketable securities fixed maturities allowance for credit loss	17	18
Equity securities at cost	965	964
Mortgage loans on real estate commercial and consumer allowance for credit loss	16	16
Allowance for uncollectible reinsurance	22	21
Allowance for uncollectible insurance receivables	28	29
Accumulated depreciation on property and equipment	264	255
Due to related parties	$ 85	$ 56
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)	271,293,966	271,363,999
Treasury stock, shares (in shares)	1,746,277	1,676,244