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Retirement Benefits (Tables)
 12 Months Ended
Dec. 30, 2022
Retirement Benefits [Abstract]  
Plan assets by category and fair value measurement level
Assets of all plans by category and fair value measurement level were as follows (in thousands):
Level20222021
Cash and cash equivalents1$351 $303 
Insurance contract332,163 30,926 
Investments categorized in fair value hierarchy32,514 31,229 
Equity
U.S. Large CapN/A74,838 110,569 
U.S. Small/Mid CapN/A5,191 11,338 
InternationalN/A37,862 56,128 
Total equity117,891 178,035 
Fixed incomeN/A93,262 130,774 
Real estate and otherN/A37,508 7,862 
Investments measured at net asset value248,661 316,671 
Total$281,175 $347,900 
Level 3 plan assets activity
The following table is a reconciliation of pension assets measured at fair value using level 3 inputs (in thousands):
20222021
Balance, beginning of year$30,926 $31,877 
Purchases2,431 2,430 
Redemptions(669)(2,556)
Unrealized losses(525)(825)
Balance, end of year$32,163 $30,926 
Funded status of plans
The following provides a reconciliation of the changes in the plans’ benefit obligations and fair value of assets over the periods ending December 30, 2022, and December 31, 2021, and a statement of the funded status as of the same dates (in thousands):
 Pension BenefitsPostretirement Medical Benefits
 2022202120222021
Change in benefit obligation
Obligation, beginning of year$418,051 $510,652 $32,122 $34,458 
Service cost8,242 9,355 516 670 
Interest cost10,996 11,409 839 832 
Actuarial (gain) loss (110,467)(31,093)(9,044)(2,391)
Benefit payments(9,122)(13,360)(1,503)(1,447)
Plan amendments(267)(1,458)— — 
Settlements— (64,886)— — 
Exchange rate changes(1,626)(2,568)— — 
Obligation, end of year$315,807 $418,051 $22,930 $32,122 
Change in plan assets
Fair value, beginning of year$347,900 $373,565 $— $— 
Actual return on assets(80,078)30,984 — — 
Employer contributions22,756 22,493 1,503 1,447 
Benefit payments(9,122)(13,360)(1,503)(1,447)
Settlements— (64,886)— — 
Exchange rate changes(281)(896)— — 
Fair value, end of year$281,175 $347,900 $— $— 
Unfunded status$(34,632)$(70,151)$(22,930)$(32,122)
Amounts recognized in balance sheets
Amounts recognized in consolidated balance sheets
Non-current assets$5,398 $— $— $— 
Current liabilities1,860 1,769 1,763 1,768 
Non-current liabilities38,170 68,382 21,167 30,354 
Net$34,632 $70,151 $22,930 $32,122 
Accumulated benefit obligation in excess of plan assets Information for plans with an accumulated benefit obligation in excess of plan assets follows (in thousands):
20222021
Projected benefit obligation$72,190 $91,678 
Accumulated benefit obligation69,395 88,927 
Fair value of plan assets32,164 30,926 
Components of net periodic benefit cost
The components of net periodic benefit cost for the plans for 2022, 2021 and 2020 were as follows (in thousands):
 Pension BenefitsPostretirement Medical Benefits
 202220212020202220212020
Service cost-benefits earned during the period$8,242 $9,355 $9,361 $516 $670 $609 
Interest cost on projected benefit obligation10,996 11,409 13,313 839 832 1,016 
Expected return on assets(19,754)(20,767)(18,814)— — — 
Amortization of prior service cost84 246 294 — — — 
Amortization of net loss4,701 9,248 10,243 345 1,002 733 
Settlement loss— 12,285 — — — — 
Cost of pension plans which are not significant and have not adopted ASC 715284 368 168 N/AN/AN/A
Net periodic benefit cost$4,553 $22,144 $14,565 $1,700 $2,504 $2,358 
Amounts recognized in other comprehensive (income) loss
Amounts recognized in other comprehensive income (loss) in 2022 and 2021 were as follows (in thousands):
 Pension BenefitsPostretirement Medical Benefits
 2022202120222021
Net gain (loss) arising during the period$11,189 $42,039 $9,044 $2,391 
Amortization of net (gain) loss4,701 9,248 345 1,002 
Prior service credit (cost) arising during the period267 1,458 — — 
Settlement (gain) loss— 12,285 — — 
Amortization of prior service (credit) cost84 246 — — 
Total$16,241 $65,276 $9,389 $3,393 
Amounts included in accumulated other comprehensive (income) loss
Amounts included in accumulated other comprehensive income (loss) as of December 30, 2022 and December 31, 2021, that had not yet been recognized as components of net periodic benefit cost, were as follows (in thousands):
 Pension BenefitsPostretirement Medical Benefits
 2022202120222021
Prior service cost $1,668 $1,293 $— $— 
Net gain (loss)(55,084)(70,995)1,891 (7,498)
Net gain (loss) before income taxes(53,416)(69,702)1,891 (7,498)
Income taxes12,207 15,443 (416)1,650 
Net$(41,209)$(54,259)$1,475 $(5,848)
Assumptions used to determine obligations and cost
Assumptions used to determine the Company’s benefit obligations are shown below:
 Pension BenefitsPostretirement Medical Benefits
Weighted average assumptions2022202120222021
U.S. Plans
Discount rate5.6 %3.0 %5.6 %2.9 %
Rate of compensation increase2.7 %2.7 %N/AN/A
Non-U.S. Plans
Discount rate2.4 %0.4 %N/AN/A
Rate of compensation increase1.8 %1.3 %N/AN/A

Assumptions used to determine the Company’s net periodic benefit cost are shown below:
 Pension BenefitsPostretirement Medical Benefits
Weighted average assumptions            202220212020202220212020
U.S. Plans
Discount rate3.0 %2.6 %3.5 %2.9 %2.6 %3.4 %
Rate of compensation increase2.7 %2.7 %2.8 %N/AN/AN/A
Expected return on assets6.3 %6.3 %6.8 %N/AN/AN/A
Non-U.S. Plans
Discount rate0.4 %0.4 %0.4 %N/AN/AN/A
Rate of compensation increase1.3 %1.3 %1.3 %N/AN/AN/A
Expected return on assets1.0 %1.0 %1.5 %N/AN/AN/A
Estimated future benefit payments Estimated future benefit payments are as follows (in thousands):
Pension
Benefits		Postretirement
Medical Benefits
2023$15,583 $1,763 
202417,035 1,748 
202516,406 1,735 
202618,585 1,715 
202720,116 1,699 
Years 2028-2032107,755 8,136