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v3.23.1

Fair Value of Financial Instruments - Financial Instruments Measured and Carried at Fair Value (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financial Assets |  |
Total fixed maturity securities | $ 5,350.0 | $ 5,185.0
Equity securities | 98.8 | 99.6
Mortgage-backed securities |  |
Financial Assets |  |
Total fixed maturity securities | 584.0 | 570.4
Other, including U.S. Treasury securities |  |
Financial Assets |  |
Total fixed maturity securities | 365.0 | 342.7
Municipal bonds |  |
Financial Assets |  |
Total fixed maturity securities | 1,290.8 | 1,269.7
Foreign government bonds |  |
Financial Assets |  |
Total fixed maturity securities | 32.6 | 33.5
Corporate bonds |  |
Financial Assets |  |
Total fixed maturity securities | 1,943.5 | 1,901.7
Other asset-backed securities |  |
Financial Assets |  |
Total fixed maturity securities | 1,134.1 | 1,067.0
Carrying Amount | Recurring |  |
Financial Assets |  |
Total fixed maturity securities | 5,350.0 | 5,185.0
Equity securities | 98.8 | 99.6
Short-term investments | 75.0 | 109.4
Other investments | 41.8 | 38.6
Totals | 5,565.6 | 5,432.6
Separate Account variable annuity assets | 2,954.7 | 2,792.3
Financial Liabilities |  |
Investment contract and future policy benefit reserves, embedded derivatives | 1.7 | 1.2
Other policyholder funds, embedded derivatives | 89.9 | 91.0
Carrying Amount | Recurring | Mortgage-backed securities |  |
Financial Assets |  |
Total fixed maturity securities | 584.0 | 570.4
Carrying Amount | Recurring | Other, including U.S. Treasury securities |  |
Financial Assets |  |
Total fixed maturity securities | 364.8 | 342.6
Carrying Amount | Recurring | Municipal bonds |  |
Financial Assets |  |
Total fixed maturity securities | 1,290.9 | 1,269.7
Carrying Amount | Recurring | Foreign government bonds |  |
Financial Assets |  |
Total fixed maturity securities | 32.6 | 33.6
Carrying Amount | Recurring | Corporate bonds |  |
Financial Assets |  |
Total fixed maturity securities | 1,943.5 | 1,901.7
Carrying Amount | Recurring | Other asset-backed securities |  |
Financial Assets |  |
Total fixed maturity securities | 1,134.2 | 1,067.0
Fair Value | Recurring |  |
Financial Assets |  |
Total fixed maturity securities | 5,350.0 | 5,185.0
Equity securities | 98.8 | 99.6
Short-term investments | 75.0 | 109.4
Other investments | 41.8 | 38.6
Totals | 5,565.6 | 5,432.6
Separate Account variable annuity assets | 2,954.7 | 2,792.3
Financial Liabilities |  |
Investment contract and future policy benefit reserves, embedded derivatives | 1.7 | 1.2
Other policyholder funds, embedded derivatives | 89.9 | 91.0
Fair Value | Recurring | Level 1 |  |
Financial Assets |  |
Total fixed maturity securities | 51.7 | 36.8
Equity securities | 24.3 | 23.3
Short-term investments | 75.0 | 109.4
Other investments | 0.0 | 0.0
Totals | 151.0 | 169.5
Separate Account variable annuity assets | 2,954.7 | 2,792.3
Financial Liabilities |  |
Investment contract and future policy benefit reserves, embedded derivatives | 0.0 | 0.0
Other policyholder funds, embedded derivatives | 0.0 | 0.0
Fair Value | Recurring | Level 2 |  |
Financial Assets |  |
Total fixed maturity securities | 4,854.3 | 4,724.9
Equity securities | 72.5 | 74.3
Short-term investments | 0.0 | 0.0
Other investments | 41.8 | 38.6
Totals | 4,968.6 | 4,837.8
Separate Account variable annuity assets | 0.0 | 0.0
Financial Liabilities |  |
Investment contract and future policy benefit reserves, embedded derivatives | 1.7 | 1.2
Other policyholder funds, embedded derivatives | 0.0 | 0.0
Fair Value | Recurring | Level 3 |  |
Financial Assets |  |
Total fixed maturity securities | 444.0 | 423.3
Equity securities | 2.0 | 2.0
Short-term investments | 0.0 | 0.0
Other investments | 0.0 | 0.0
Totals | 446.0 | 425.3
Separate Account variable annuity assets | 0.0 | 0.0
Financial Liabilities |  |
Investment contract and future policy benefit reserves, embedded derivatives | 0.0 | 0.0
Other policyholder funds, embedded derivatives | 89.9 | 91.0
Fair Value | Recurring | Mortgage-backed securities |  |
Financial Assets |  |
Total fixed maturity securities | 584.0 | 570.4
Fair Value | Recurring | Mortgage-backed securities | Level 1 |  |
Financial Assets |  |
Total fixed maturity securities | 0.0 | 0.0
Fair Value | Recurring | Mortgage-backed securities | Level 2 |  |
Financial Assets |  |
Total fixed maturity securities | 581.4 | 567.8
Fair Value | Recurring | Mortgage-backed securities | Level 3 |  |
Financial Assets |  |
Total fixed maturity securities | 2.6 | 2.6
Fair Value | Recurring | Other, including U.S. Treasury securities |  |
Financial Assets |  |
Total fixed maturity securities | 364.8 | 342.6
Fair Value | Recurring | Other, including U.S. Treasury securities | Level 1 |  |
Financial Assets |  |
Total fixed maturity securities | 38.5 | 24.6
Fair Value | Recurring | Other, including U.S. Treasury securities | Level 2 |  |
Financial Assets |  |
Total fixed maturity securities | 326.3 | 318.0
Fair Value | Recurring | Other, including U.S. Treasury securities | Level 3 |  |
Financial Assets |  |
Total fixed maturity securities | 0.0 | 0.0
Fair Value | Recurring | Municipal bonds |  |
Financial Assets |  |
Total fixed maturity securities | 1,290.9 | 1,269.7
Fair Value | Recurring | Municipal bonds | Level 1 |  |
Financial Assets |  |
Total fixed maturity securities | 0.0 | 0.0
Fair Value | Recurring | Municipal bonds | Level 2 |  |
Financial Assets |  |
Total fixed maturity securities | 1,235.5 | 1,215.3
Fair Value | Recurring | Municipal bonds | Level 3 |  |
Financial Assets |  |
Total fixed maturity securities | 55.4 | 54.4
Fair Value | Recurring | Foreign government bonds |  |
Financial Assets |  |
Total fixed maturity securities | 32.6 | 33.6
Fair Value | Recurring | Foreign government bonds | Level 1 |  |
Financial Assets |  |
Total fixed maturity securities | 0.0 | 0.0
Fair Value | Recurring | Foreign government bonds | Level 2 |  |
Financial Assets |  |
Total fixed maturity securities | 32.6 | 33.6
Fair Value | Recurring | Foreign government bonds | Level 3 |  |
Financial Assets |  |
Total fixed maturity securities | 0.0 | 0.0
Fair Value | Recurring | Corporate bonds |  |
Financial Assets |  |
Total fixed maturity securities | 1,943.5 | 1,901.7
Fair Value | Recurring | Corporate bonds | Level 1 |  |
Financial Assets |  |
Total fixed maturity securities | 13.2 | 12.2
Fair Value | Recurring | Corporate bonds | Level 2 |  |
Financial Assets |  |
Total fixed maturity securities | 1,646.3 | 1,628.2
Fair Value | Recurring | Corporate bonds | Level 3 |  |
Financial Assets |  |
Total fixed maturity securities | 284.0 | 261.3
Fair Value | Recurring | Other asset-backed securities |  |
Financial Assets |  |
Total fixed maturity securities | 1,134.2 | 1,067.0
Fair Value | Recurring | Other asset-backed securities | Level 1 |  |
Financial Assets |  |
Total fixed maturity securities | 0.0 | 0.0
Fair Value | Recurring | Other asset-backed securities | Level 2 |  |
Financial Assets |  |
Total fixed maturity securities | 1,032.2 | 962.0
Fair Value | Recurring | Other asset-backed securities | Level 3 |  |
Financial Assets |  |
Total fixed maturity securities | $ 102.0 | $ 105.0

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