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v3.22.2.2

Investments - Fair Value and Gross Unrealized Losses (Details) $ in Millions | Sep. 30, 2022 USD ($) security | Dec. 31, 2021 USD ($) security
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Fixed maturity securities, Gross Unrealized Losses |  |
Number of positions with a gross unrealized loss, 12 Months or Less (security) | security | 3,002 | 516
Number of positions with a gross unrealized loss, more than 12 months (security) | security | 303 | 122
Number of positions with a gross unrealized loss, Total (security) | security | 3,305 | 638
Fair value as a percentage of total fixed maturities and equity securities fair value, 12 Months or Less (percent) | 77.40% | 12.60%
Fair value as a percentage of total fixed maturities and equity securities fair value, more than 12 months (percent) | 7.80% | 3.40%
Fair value as a percentage of total fixed maturities and equity securities fair value, Total (percent) | 85.20% | 16.00%
Total |  |
Fixed maturity securities, Fair Value |  |
Fixed maturity securities, Fair Value, 12 Months or Less | $ 4,082.5 | $ 783.4
Fixed maturity securities, Fair Value, More than 12 Months | 413.2 | 211.9
Fixed maturity securities, Fair Value, Total | 4,495.7 | 995.3
Fixed maturity securities, Gross Unrealized Losses |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 565.7 | 11.3
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 95.6 | 7.3
Fixed maturity securities, Gross Unrealized Losses, Total | 661.3 | 18.6
Mortgage-backed securities |  |
Fixed maturity securities, Fair Value |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 472.2 | 67.4
Fixed maturity securities, Fair Value, More than 12 Months | 51.3 | 3.9
Fixed maturity securities, Fair Value, Total | 523.5 | 71.3
Fixed maturity securities, Gross Unrealized Losses |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 51.5 | 1.3
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 14.6 | 0.2
Fixed maturity securities, Gross Unrealized Losses, Total | 66.1 | 1.5
Other |  |
Fixed maturity securities, Fair Value |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 266.6 | 59.5
Fixed maturity securities, Fair Value, More than 12 Months | 58.0 | 35.1
Fixed maturity securities, Fair Value, Total | 324.6 | 94.6
Fixed maturity securities, Gross Unrealized Losses |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 36.6 | 1.7
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 29.4 | 2.6
Fixed maturity securities, Gross Unrealized Losses, Total | 66.0 | 4.3
Municipal bonds |  |
Fixed maturity securities, Fair Value |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 1,035.5 | 56.8
Fixed maturity securities, Fair Value, More than 12 Months | 9.7 | 0.6
Fixed maturity securities, Fair Value, Total | 1,045.2 | 57.4
Fixed maturity securities, Gross Unrealized Losses |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 143.5 | 0.7
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 4.0 | 0.0
Fixed maturity securities, Gross Unrealized Losses, Total | 147.5 | 0.7
Foreign government bonds |  |
Fixed maturity securities, Fair Value |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 35.4 | 0.0
Fixed maturity securities, Fair Value, More than 12 Months | 0.0 | 0.0
Fixed maturity securities, Fair Value, Total | 35.4 | 0.0
Fixed maturity securities, Gross Unrealized Losses |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 1.7 | 0.0
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 0.0 | 0.0
Fixed maturity securities, Gross Unrealized Losses, Total | 1.7 | 0.0
Corporate bonds |  |
Fixed maturity securities, Fair Value |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 1,496.6 | 220.7
Fixed maturity securities, Fair Value, More than 12 Months | 80.3 | 44.1
Fixed maturity securities, Fair Value, Total | 1,576.9 | 264.8
Fixed maturity securities, Gross Unrealized Losses |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 280.0 | 3.8
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 31.0 | 1.4
Fixed maturity securities, Gross Unrealized Losses, Total | 311.0 | 5.2
Other asset-backed securities |  |
Fixed maturity securities, Fair Value |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 776.2 | 379.0
Fixed maturity securities, Fair Value, More than 12 Months | 213.9 | 128.2
Fixed maturity securities, Fair Value, Total | 990.1 | 507.2
Fixed maturity securities, Gross Unrealized Losses |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 52.4 | 3.8
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 16.6 | 3.1
Fixed maturity securities, Gross Unrealized Losses, Total | $ 69.0 | $ 6.9

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