Retirement Benefits (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 26, 2026 |
Jun. 27, 2025 |
Jun. 26, 2026 |
Jun. 27, 2025 |
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| Pension Benefits | ||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | $ 1,166 | $ 1,039 | $ 2,332 | $ 2,292 |
| Interest cost | 2,647 | 2,568 | 5,295 | 4,711 |
| Expected return on assets | (3,273) | (2,904) | (6,548) | (5,807) |
| Amortization and other | (74) | 202 | (152) | 366 |
| Net periodic benefit cost | 466 | 905 | 927 | 1,562 |
| Postretirement Medical | ||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | 75 | 78 | 150 | 153 |
| Interest cost | 225 | 369 | 450 | 569 |
| Amortization | 0 | (136) | 0 | (136) |
| Net periodic benefit cost | $ 300 | $ 311 | $ 600 | $ 586 |
| X | ||||||||||
- Definition The amount of gains or losses recognized in net periodic benefit cost. This element may be used to encapsulate any other periodic costs associated with defined benefit plans that are not separately disclosed. No definition available.
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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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/disclosureRef
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Details
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- Details
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