Other Comprehensive Income (Loss) (Reclassifications out of Accumulated Other Comprehensive (Loss) Income) (Parenthetical) (Details) - Defined Benefit Pension and Postretirement Plans [Member] |
9 Months Ended | |
|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Condensed Statement Of Income Captions [Line Items] | ||
| Loss adjustment expenses | 40.00% | 40.00% |
| Percentage of other operating expenses | 60.00% | 60.00% |
| X | ||||||||||
- 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/disclosureRef
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| X | ||||||||||
- Definition Percentage of amounts reclassified from AOCI for pension and post retirement benefits allocated to loss adjustment expenses. No definition available.
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| X | ||||||||||
- Definition Percentage of amounts reclassified from AOCI for pension and post retirement benefits allocated to other operating expenses. No definition available.
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| X | ||||||||||
- Details
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