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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

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