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INVESTMENTS - Schedule of Unrealized Losses (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value |  |
Less than 12 Months | $ 51.0 | $ 143.0
12 Months or More | 28.2 | 43.9
Total | 79.2 | 186.9
Unrealized Loss |  |
Less than 12 Months | (0.2) | (1.6)
12 Months or More | (0.8) | (1.5)
Total | (1.0) | (3.1)
U.S. Treasury securities and agencies |  |
Fair Value |  |
Less than 12 Months | 2.7 | 26.4
12 Months or More | 0.7 | 1.8
Total | 3.4 | 28.2
Unrealized Loss |  |
Less than 12 Months | 0.0 | (0.3)
12 Months or More | (0.1) | 0.0
Total | (0.1) | (0.3)
Municipal securities |  |
Fair Value |  |
Less than 12 Months | 1.3 | 7.1
12 Months or More | 8.3 | 10.4
Total | 9.6 | 17.5
Unrealized Loss |  |
Less than 12 Months | 0.0 | (0.1)
12 Months or More | (0.2) | (0.4)
Total | (0.2) | (0.5)
Corporate debt securities |  |
Fair Value |  |
Less than 12 Months | 26.1 | 49.5
12 Months or More | 11.2 | 21.1
Total | 37.3 | 70.6
Unrealized Loss |  |
Less than 12 Months | (0.1) | (0.6)
12 Months or More | (0.3) | (0.6)
Total | (0.4) | (1.2)
Asset-backed securities |  |
Fair Value |  |
Less than 12 Months | 17.4 | 53.6
12 Months or More | 8.0 | 10.6
Total | 25.4 | 64.2
Unrealized Loss |  |
Less than 12 Months | (0.1) | (0.6)
12 Months or More | (0.2) | (0.5)
Total | (0.3) | (1.1)
Total fixed maturities |  |
Fair Value |  |
Less than 12 Months | 47.5 | 136.6
12 Months or More | 28.2 | 43.9
Total | 75.7 | 180.5
Unrealized Loss |  |
Less than 12 Months | (0.2) | (1.6)
12 Months or More | (0.8) | (1.5)
Total | (1.0) | (3.1)
Short-term investments |  |
Fair Value |  |
Less than 12 Months | 3.5 | 6.4
12 Months or More | 0.0 | 0.0
Total | 3.5 | 6.4
Unrealized Loss |  |
Less than 12 Months | 0.0 | 0.0
12 Months or More | 0.0 | 0.0
Total | $ 0.0 | $ 0.0

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