Goodwill (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Apr. 01, 2026 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Goodwill [Line Items] | |||||
| Goodwill Impairment | $ 460.0 | $ 0.0 | $ 460.0 | $ 0.0 | |
| Disposal Group, Disposed of by Sale, Not Discontinued Operations | Newins | Specialty Property & Casualty Insurance | |||||
| Goodwill [Line Items] | |||||
| Assets of disposal group | $ 14.9 | ||||
| Goodwill of disposal group | 7.2 | ||||
| Pre-tax gain on sale | $ 7.5 | ||||
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- Definition Amount classified as assets attributable to disposal group held for sale or disposed of. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount classified as goodwill attributable to disposal group held for sale or disposed of. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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