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Pension and Postretirement Benefit Obligations - Narrative (Details)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended
Jun. 28, 2024
USD ($)
Jun. 30, 2023
USD ($)
Jun. 28, 2024
USD ($)
Jun. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
benefitPlan
Defined Benefit Plan Disclosure [Line Items]            
Pension plan settlement expense $ 0 $ 39,777 $ 0 $ 39,777 $ 112,800  
Pension Plans            
Defined Benefit Plan Disclosure [Line Items]            
Number of company-sponsored pension plans | benefitPlan           2
Pension Plans | Bargaining Plan | Maximum            
Defined Benefit Plan Disclosure [Line Items]            
Expected future employer contributions, next fiscal year $ 2,000   $ 2,000