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v3.25.3

Business Segments - Segment Expenses (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Segment Reporting Information [Line Items] |  |  |  |
Incurred Losses and LAE Related to Prior Years |  |  | $ 66.2 | $ 27.4
Income Tax Expense | $ (8.9) | $ 18.5 | 31.6 | 52.4
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating Expenses | 1,195.6 | 1,005.1 | 3,360.3 | 2,888.6
Operating Segments | Specialty Property & Casualty Insurance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Incurred Losses and LAE | 851.1 | 647.9 | 2,287.3 | 1,869.2
Policy Acquisition Costs | 137.0 | 119.6 | 409.4 | 349.0
Business Unit Operating Costs | 44.2 | 40.5 | 122.6 | 101.4
Corporate Overhead Costs | 33.4 | 34.8 | 102.5 | 102.1
Total Insurance Expenses | 214.6 | 194.9 | 634.5 | 552.5
Income Tax Expense | 0.3 | 26.2 | 44.4 | 69.1
Operating Expenses | 1,066.0 | 869.0 | 2,966.2 | 2,490.8
Operating Segments | Specialty Property & Casualty Insurance | Non-catastrophe Losses |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Incurred Losses and LAE Related to Current Year | 798.7 | 644.2 | 2,211.1 | 1,846.0
Incurred Losses and LAE Related to Prior Years | 51.4 | (0.1) | 65.5 | 4.4
Operating Segments | Specialty Property & Casualty Insurance | Catastrophe Losses |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Incurred Losses and LAE Related to Current Year | 1.0 | 3.6 | 10.1 | 18.0
Incurred Losses and LAE Related to Prior Years | 0.0 | 0.2 | 0.6 | 0.8
Operating Segments | Life Insurance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Policyholders’ Benefits and Incurred Losses and LAE | 60.5 | 64.1 | 186.2 | 191.0
Policy Acquisition Costs | 32.8 | 34.9 | 97.7 | 100.3
Business Unit Operating Costs | 24.6 | 24.1 | 76.1 | 71.6
Corporate Overhead Costs | 8.2 | 10.0 | 25.9 | 31.0
Total Insurance Expenses | 65.6 | 69.0 | 199.7 | 202.9
Income Tax Expense | 3.5 | 3.0 | 8.2 | 3.9
Operating Expenses | $ 129.6 | $ 136.1 | $ 394.1 | $ 397.8

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