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v3.25.1

Investments - Fixed Maturities Securities and Short-term Investments (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Amortized Cost |  |
Amortized Cost | $ 212.9 | $ 208.3
Amortized Cost | 175.4 | 167.6
Amortized Cost | 388.3 | 375.9
Gross Unrealized Gains |  |
Gross Unrealized Gains | 1.6 | 0.9
Gross Unrealized Gains | 0.0 | 0.0
Gross Unrealized Gains | 1.6 | 0.9
Gross Unrealized Losses |  |
Gross Unrealized Losses | (2.3) | (3.5)
Gross Unrealized Losses | 0.0 | 0.0
Gross Unrealized Losses | (2.3) | (3.5)
Fair Value |  |
Fair Value | 212.2 | 205.7
Fair Value | 175.4 | 167.6
Total investments | 387.6 | 373.3
U.S. government and agencies |  |
Amortized Cost |  |
Amortized Cost | 29.3 | 24.8
Amortized Cost | 129.2 | 118.5
Gross Unrealized Gains |  |
Gross Unrealized Gains | 0.1 | 0.0
Gross Unrealized Gains | 0.0 | 0.0
Gross Unrealized Losses |  |
Gross Unrealized Losses | (0.1) | (0.2)
Gross Unrealized Losses | 0.0 | 0.0
Fair Value |  |
Fair Value | 29.3 | 24.6
Fair Value | 129.2 | 118.5
States and other territories |  |
Amortized Cost |  |
Amortized Cost | 10.5 | 11.2
Gross Unrealized Gains |  |
Gross Unrealized Gains | 0.0 | 0.0
Gross Unrealized Losses |  |
Gross Unrealized Losses | (0.2) | (0.3)
Fair Value |  |
Fair Value | 10.3 | 10.9
Corporate securities |  |
Amortized Cost |  |
Amortized Cost | 135.6 | 131.8
Amortized Cost | 37.8 | 31.6
Gross Unrealized Gains |  |
Gross Unrealized Gains | 1.4 | 0.8
Gross Unrealized Gains | 0.0 | 0.0
Gross Unrealized Losses |  |
Gross Unrealized Losses | (0.5) | (1.1)
Gross Unrealized Losses | 0.0 | 0.0
Fair Value |  |
Fair Value | 136.5 | 131.5
Fair Value | 37.8 | 31.6
Foreign securities |  |
Fair Value |  |
Fair Value |  | 0.0
Residential mortgage-backed securities |  |
Amortized Cost |  |
Amortized Cost | 20.9 | 21.5
Gross Unrealized Gains |  |
Gross Unrealized Gains | 0.1 | 0.0
Gross Unrealized Losses |  |
Gross Unrealized Losses | (1.2) | (1.5)
Fair Value |  |
Fair Value | 19.8 | 20.0
Commercial mortgage-backed securities |  |
Amortized Cost |  |
Amortized Cost | 7.1 | 7.2
Gross Unrealized Gains |  |
Gross Unrealized Gains | 0.0 | 0.1
Gross Unrealized Losses |  |
Gross Unrealized Losses | (0.3) | (0.4)
Fair Value |  |
Fair Value | 6.8 | 6.9
Asset backed securities |  |
Amortized Cost |  |
Amortized Cost | 9.5 | 11.8
Gross Unrealized Gains |  |
Gross Unrealized Gains | 0.0 | 0.0
Gross Unrealized Losses |  |
Gross Unrealized Losses | 0.0 | 0.0
Fair Value |  |
Fair Value | 9.5 | 11.8
Commercial paper |  |
Amortized Cost |  |
Amortized Cost | 8.4 | 17.5
Gross Unrealized Gains |  |
Gross Unrealized Gains | 0.0 | 0.0
Gross Unrealized Losses |  |
Gross Unrealized Losses | 0.0 | 0.0
Fair Value |  |
Fair Value | $ 8.4 | $ 17.5

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