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Consolidated Balance Sheets (Parenthetical) - USD ($) | Mar. 31, 2024 | Dec. 31, 2023
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Statement of Financial Position [Abstract] |  |
Amortized cost of fixed maturities available-for-sale | $ 75,270,000,000 | $ 74,033,000,000
Allowance for credit losses of fixed maturities available-for-sale | 4,000,000 | 4,000,000
Allowance for credit losses of mortgage loans on real estate | 297,000,000 | 279,000,000
Allowance for credit losses of amounts due from reinsurers | $ 8,000,000 | $ 7,000,000
Preferred stock par value (in dollars per share) | $ 1 | $ 1
Preferred stock, liquidation preference | $ 25,000 | $ 25,000
Common stock par value (in dollars per share) | $ 0.01 | $ 0.01
Common stock authorized (in shares) | 2,000,000,000 | 2,000,000,000
Common stock issued (in shares) | 486,728,840 | 491,003,966
Common stock outstanding (in shares) | 327,616,168 | 333,877,990
Treasury stock (in shares) | 159,108,981 | 157,125,976

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