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Amortization of Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Finite-Lived Intangible Assets Amortization Expense | The following table presents the amortization expense on definite life intangible assets incurred by the Company for the three and six months ended June 30, 2025 and 2024:
|  | Three Months Ended |  | Six Months Ended
(Dollars in Millions) |  | Jun 30, 2025 |  | Jun 30, 2024 |  | Jun 30, 2025 |  | Jun 30, 2024
Specialty Property & Casualty Insurance |  | $ | 4.6 |  |  | $ | 3.9 |  |  | $ | 8.8 |  |  | $ | 8.6 |
Life Insurance |  | 1.7 |  |  | 1.4 |  |  | 3.3 |  |  | 2.6 |
Total Segment Amortization Expense |  | 6.3 |  |  | 5.3 |  |  | 12.1 |  |  | 11.2 |
Corporate and Other |  | 4.9 |  |  | 5.6 |  |  | 9.8 |  |  | 11.5 |
Non-Core Operations |  | 0.7 |  |  | 0.4 |  |  | 1.3 |  |  | 0.7 |
Total Amortization Expense |  | $ | 11.9 |  |  | $ | 11.3 |  |  | $ | 23.2 |  |  | $ | 23.4 |

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- Definition Tabular disclosure of amortization expense of assets, excluding financial assets, that lack physical substance, having a limited useful life. + References No definition available. + Details
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