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Consolidated Balance Sheets (Parenthetical) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Statement of Financial Position [Abstract] |  |
Amortized cost of fixed maturities | $ 6,692,700,000 | $ 6,372,700,000
Cost of equity securities | 684,100,000 | 818,800,000
Receivables from Policyholders, allowance for credit losses | 20,900,000 | 22,300,000
Debt | $ 1,247,800,000 | $ 820,200,000
Common stock, par value (in dollars per share) | $ 0.10 |
Common stock, shares authorized (in shares) | 100,000,000 |
Common stock, shares outstanding (in shares) | 65,436,207 | 66,665,888
Amortized cost of fixed maturities | $ (3,300,000) | $ 0

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