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Employee Retirement Plans Summary of the Plans' Net Periodic Pension Cost, Benefit Obligations, Funded Status, and Net Balance Sheet Position (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 28, 2024 | Dec. 30, 2023 | Dec. 31, 2022
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |  |
Liability, Defined Benefit Pension Plan, Noncurrent | $ 9,573 | $ 12,128 |
Pre-tax components in accumulated other comprehensive income at period end: |  |  |
Long-lived assets | 823,849 | 761,447 | $ 662,804
Non US Plans |  |  |
Net Periodic Pension Cost: |  |  |
Interest cost | 43,892 | 46,046 |
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | (62,289) | (58,766) |
Defined Benefit Plan, Amortization of Gain (Loss) | (204) | (186) |
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | 2,674 | 2,601 |
Defined Benefit Plan, Net Periodic Benefit Cost | (15,519) | (9,933) |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Defined Benefit Plan, Benefit Obligation, Beginning Balance | 989,106 | 946,153 |
Interest cost | 43,892 | 46,046 |
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) | (94,002) | 1,970 |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | (61,506) | (59,018) |
Exchange effect | (10,348) | 53,955 |
Defined Benefit Plan, Benefit Obligation, Ending Balance | 867,142 | 989,106 |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance | 1,027,421 | 943,757 |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 103 | 6,012 |
Defined Benefit Plan Investment Gain Loss | 4,086 | 81,945 |
Defined Benefit Plan Fair Value Of Plan Assets Benefits Paid | (61,506) | (59,018) |
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss) | (11,755) | 54,725 |
Defined Benefit Plan, Plan Assets, Amount, Ending Balance | 958,349 | 1,027,421 |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |
Defined Benefit Plan Benefit Obligation Unfunded Status Of Plan | 91,207 | (38,315) |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |  |
Liability, Defined Benefit Pension Plan, Noncurrent | 91,207 | 38,315 |
Pre-tax components in accumulated other comprehensive income at period end: |  |  |
Net actuarial loss | 64,371 | 103,705 |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax | (36,008) | (17,079) |
Defined Benefit Plan, Amount Recognized in Net Periodic Benefit Cost (Credit) and Other Comprehensive (Income) Loss, before Tax | (205) | (150) |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax | (3,121) | (360) |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax | 39,334 | 17,589 |
Defined Benefit Plan, Accumulated Benefit Obligation | $ 867,119 | $ 989,081 |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase | 0.80% | 0.80% |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate | 5.50% | 4.60% |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets | 5.90% | 6.20% |
USPlans |  |  |
Net Periodic Pension Cost: |  |  |
Interest cost | $ 1,267 | $ 1,315 |
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | (926) | (873) |
Defined Benefit Plan, Amortization of Gain (Loss) | (281) | (420) |
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | 0 | 0 |
Defined Benefit Plan, Net Periodic Benefit Cost | 622 | 862 |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Defined Benefit Plan, Benefit Obligation, Beginning Balance | 27,659 | 27,550 |
Interest cost | 1,267 | 1,315 |
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) | (1,598) | 539 |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | (1,747) | (1,745) |
Exchange effect | 0 | 0 |
Defined Benefit Plan, Benefit Obligation, Ending Balance | 25,581 | 27,659 |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance | 15,751 | 14,998 |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 1,244 | 1,114 |
Defined Benefit Plan Investment Gain Loss | 760 | 1,384 |
Defined Benefit Plan Fair Value Of Plan Assets Benefits Paid | (1,747) | (1,745) |
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss) | 0 | 0 |
Defined Benefit Plan, Plan Assets, Amount, Ending Balance | 16,008 | 15,751 |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |
Defined Benefit Plan Benefit Obligation Unfunded Status Of Plan | 9,573 | 11,908 |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |  |
Liability, Defined Benefit Pension Plan, Noncurrent | 9,573 | 11,908 |
Pre-tax components in accumulated other comprehensive income at period end: |  |  |
Net actuarial loss | 297 | 2,011 |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax | (1,432) | 28 |
Defined Benefit Plan, Amount Recognized in Net Periodic Benefit Cost (Credit) and Other Comprehensive (Income) Loss, before Tax | (281) | (420) |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax | 0 | 0 |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax | 1,713 | 392 |
Defined Benefit Plan, Accumulated Benefit Obligation | $ 25,581 | $ 27,659 |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate | 5.40% | 4.80% |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets | 6.00% | 6.00% |

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