XML 108 R73.htm IDEA: XBRL DOCUMENT v3.24.0.1
Retirement Benefits (Narrative) (Details)
$ in Thousands
 12 Months Ended
Dec. 29, 2023
USD ($)
Dec. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Defined Contribution Plan, Employer Matching Contribution, Percent of Match 100.00%    
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 3.00%    
Company contribution rate for employees not covered by DBP 2.00%    
Company contributions to 401K $ 11,500 $ 11,000 $ 10,000
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement $ 147,000    
Pension Plan Participants Transfered 651    
Pension settlement losses $ 42,000   12,000
Highest earnings years 5 years    
Years preceding retirement 10 years    
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 20,000 20,000  
Accumulated benefit obligation for all defined benefit plans 186,000 297,000  
Pension and Other Postretirement Benefits Cost (Reversal of Cost) 44,000 1,000 12,000
Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement 149,212 0  
Pension settlement losses $ (42,169) 0 (12,285)
Investments at Net Asset Value, Redemption Frequency daily    
Investments at Net Asset Value, Unfunded Commitments $ 2,300 2,300  
Defined Benefit Plan, Plan Assets, Contributions by Employer 23,066 22,756  
Expected company contributions to retirement plans next year $ 1,700    
Pension Benefits | Minimum      
Defined Benefit Plan Disclosure [Line Items]      
Investments at Net Asset Value, Redemption Notice Period 10 days    
Pension Benefits | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Investments at Net Asset Value, Redemption Notice Period 60 days    
Postretirement Medical Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement $ 0 0  
Pension settlement losses 0 0 $ 0
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 1,552 $ 1,503  
Retirement medical plan limit on annual increase in company cost 3.00%    
Health care cost trend rate assumed for next year 8.20%    
Ultimate health care cost trend rate 4.50%    
Year that rate reaches ultimate trend rate 2038    
Expected company contributions to retirement plans next year $ 1,700    
Equity | Pension Plan - Blue Plan      
Defined Benefit Plan Disclosure [Line Items]      
Target plan asset allocations 52.00%    
Fixed income | Pension Plan - Blue Plan      
Defined Benefit Plan Disclosure [Line Items]      
Target plan asset allocations 32.00%    
Real estate and other | Pension Plan - Blue Plan      
Defined Benefit Plan Disclosure [Line Items]      
Target plan asset allocations 16.00%