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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
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Dec. 30, 2023 | Dec. 31, 2022
Amounts recognized in balance sheet at year end: |  |
Liability, Defined Benefit Pension Plan, Noncurrent | $ 12,128 | $ 14,948
Non US Plans |  |
Net Periodic Pension Cost: |  |
Interest cost | 46,046 | 25,032
Expected return on assets | (58,766) | (74,581)
Amortization of net loss | (186) | (3,671)
Amortization of prior service cost | 2,601 | 2,589
Defined Benefit Plan, Net Periodic Benefit Cost | (9,933) | (43,289)
Change in Benefit Obligation: |  |
Benefit obligation – beginning of year | 946,153 | 1,544,147
Interest cost | 46,046 | 25,032
Actuarial loss (gain) | 1,970 | (409,462)
Net benefit payments | (59,018) | (59,682)
Exchange effect | 53,955 | (153,882)
Benefit obligation – end of year | 989,106 | 946,153
Change in Plan Assets: |  |
Plan assets at fair value – beginning of year | 943,757 | 1,342,601
Company contributions | 6,012 | 5,442
Investment gain (loss) | 81,945 | (207,270)
Benefit payments and plan expenses | (59,018) | (59,682)
Exchange effect | 54,725 | (137,334)
Plan assets at fair value – end of year | 1,027,421 | 943,757
Funded Status: |  |
Unfunded benefit obligation | 38,315 | 2,396
Amounts recognized in balance sheet at year end: |  |
Liability, Defined Benefit Pension Plan, Noncurrent | 38,315 | 2,396
Pre-tax components in accumulated other comprehensive income at period end: |  |
Net actuarial loss | 103,705 | 121,292
Current year actuarial gain | (17,079) | (148,515)
Actuarial loss recognized | (150) | (4,272)
Prior service cost recognized | (360) | (7,666)
Total amount recognized | 17,589 | 160,453
Accumulated Benefit Obligation | $ 989,081 | $ 946,136
Salary growth rate | 0.80% | 0.80%
Assumed discount rate | 4.60% | 4.80%
Expected return on assets | 6.20% | 6.20%
USPlans |  |
Net Periodic Pension Cost: |  |
Interest cost | $ 1,315 | $ 923
Expected return on assets | (873) | (1,073)
Amortization of net loss | (420) | (758)
Amortization of prior service cost | 0 | 0
Defined Benefit Plan, Net Periodic Benefit Cost | 862 | 608
Change in Benefit Obligation: |  |
Benefit obligation – beginning of year | 27,550 | 36,423
Interest cost | 1,315 | 923
Actuarial loss (gain) | 539 | (8,060)
Net benefit payments | (1,745) | (1,736)
Exchange effect | 0 | 0
Benefit obligation – end of year | 27,659 | 27,550
Change in Plan Assets: |  |
Plan assets at fair value – beginning of year | 14,998 | 18,289
Company contributions | 1,114 | 1,173
Investment gain (loss) | 1,384 | (2,728)
Benefit payments and plan expenses | (1,745) | (1,736)
Exchange effect | 0 | 0
Plan assets at fair value – end of year | 15,751 | 14,998
Funded Status: |  |
Unfunded benefit obligation | 11,908 | 12,552
Amounts recognized in balance sheet at year end: |  |
Liability, Defined Benefit Pension Plan, Noncurrent | 11,908 | 12,552
Pre-tax components in accumulated other comprehensive income at period end: |  |
Net actuarial loss | 2,011 | 2,402
Current year actuarial gain | 28 | (4,259)
Actuarial loss recognized | (420) | (758)
Prior service cost recognized | 0 | 0
Total amount recognized | 392 | 5,017
Accumulated Benefit Obligation | $ 27,659 | $ 27,550
Assumed discount rate | 4.80% | 4.90%
Expected return on assets | 6.00% | 6.00%

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