Consolidated Balance Sheets - (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Fixed maturities securities at amortized cost	$ 42,414	$ 41,032
Marketable securities fixed maturities allowance for credit loss	16	1
Equity securities at cost	686	703
Mortgage loans on real estate commercial and consumer allowance for credit loss	35	24
Allowance for uncollectible reinsurance	22	22
Allowance for uncollectible insurance receivables	28	29
Accumulated depreciation on property and equipment	296	280
Other assets	2,534	2,274	[1]
Other liabilities	$ 2,897	$ 2,983	[1]
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)	270,881,457	270,895,902
Treasury stock, shares (in shares)	2,158,786	2,144,341
Related Party
Other assets	$ 23	$ 18
Other liabilities	$ 28	$ 26

[1] As of January 1, 2023, the Company adopted ASU 2018-12, Financial Services-Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts (ASU 2018-12) using the modified retrospective method applied as of the transition date of January 1, 2021. Prior period amounts in the financial statements have been adjusted to reflect application of the new guidance. See Note A to the Consolidated Financial Statements for additional information.