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CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Investments: |  |
Fixed maturities, available for sale, allowance for credit losses | $ 69.4 | $ 56.0
Fixed maturities, available for sale, amortized cost | 23,899.5 | 23,384.2
Mortgage loans, allowance for credit losses | 10.9 | 8.0
Investments held by variable interest entities, allowance for credit losses | 2.9 | 5.5
Investments held by variable interest entities, amortized cost | 880.6 | 1,134.2
Reinsurance receivables, allowance for current expected credit losses | $ 3.0 | $ 2.0
Shareholders' equity: |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common stock, shares authorized (in shares) | 8,000,000,000 | 8,000,000,000
Common stock, shares issued (in shares) | 112,163,169 | 114,343,070
Common stock, shares outstanding (in shares) | 112,163,169 | 114,343,070

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