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v3.25.1

INVESTMENTS - NARRATIVE (Details) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 USD ($) | Mar. 31, 2025 USD ($) mortgage_loan | Mar. 31, 2025 USD ($) loan | Mar. 31, 2024 USD ($)
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Amortized cost of fixed maturities that were non-income producing | $ 5.7 | $ 5.7 | $ 5.7 |
Carrying value of fixed maturities that were non-income producing | 4.2 | $ 4.2 | $ 4.2 |
Value of available for sale securities sold | 230.3 |  |  | $ 197.1
Financial Asset, Past Due |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of mortgage loans noncurrent |  | 0 | 26 |
Total Fixed Maturities, Available For Sale |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Gross realized losses on sale | 2.8 |  |  | 5.9
Commercial mortgage-backed securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Gross realized losses on sale |  |  |  | 1.1
Corporate Securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Gross realized losses on sale |  |  |  | 3.5
Various Other Investments |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Gross realized losses on sale |  |  |  | $ 1.3
Amortized Cost | Residential Mortgage |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Mortgage loans | 1,081.5 | $ 1,081.5 | $ 1,081.5 |
Fair Value | Residential Mortgage |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Mortgage loans | 1,091.2 | $ 1,091.2 | 1,091.2 |
Commercial Portfolio Segment |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of mortgage loans in process of foreclosure | mortgage_loan |  | 0 |  |
Amortized cost | 1,539.7 | $ 1,539.7 | 1,539.7 |
Commercial Portfolio Segment | Amortized Cost | Commercial Mortgage |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Mortgage loans | 1,539.8 | 1,539.8 | 1,539.8 |
Commercial Portfolio Segment | Fair Value | Commercial Mortgage |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Mortgage loans | 1,417.9 | 1,417.9 | 1,417.9 |
Residential Portfolio Segment | Financial Asset, Past Due |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Amortized cost | 20.2 | 20.2 | $ 20.2 |
Residential Portfolio Segment | Foreclosure | Financial Asset, Past Due |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of mortgage loans noncurrent | loan |  |  | 9 |
Amortized cost | $ 4.9 | $ 4.9 | $ 4.9 |

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