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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Statement of Financial Position [Abstract] |  |
Fixed maturities, at amortized cost | $ 7,575.3 | $ 7,358.2
Fixed maturities, allowance for credit losses | 7.5 | 7.5
Equity securities, at cost | 302.4 | 618.7
Premium receivables, allowance for credit losses | 12.5 | 13.6
Long-term Debt | $ 1,204.1 | $ 1,152.1
Common stock, par value (in dollars per share) | $ 0.10 | $ 0.10
Common stock, shares authorized (in shares) | 100,000,000 | 100,000,000
Common stock, shares issued (in shares) | 63,884,152 | 63,684,628
Common stock, shares outstanding (in shares) | 63,884,152 | 63,684,628

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