v3.25.1
Pension, Postretirement and Postemployment Defined Benefit Plans - Narrative (Details)
3 Months Ended 6 Months Ended
Mar. 30, 2025
USD ($)
plan
Mar. 24, 2024
USD ($)
participant
Mar. 30, 2025
USD ($)
plan
Mar. 24, 2024
USD ($)
participant
Sep. 29, 2024
USD ($)
Defined Benefit Plan Disclosure [Line Items]          
Number of defined benefit plans | plan 1   1    
Multiemployer plans, withdrawal obligation $ 23,100,000   $ 23,100,000   $ 23,600,000
Multiemployer plans, withdrawal obligation, period (years)     20 years    
Pension Plan          
Defined Benefit Plan Disclosure [Line Items]          
Defined benefit plan, plan assets, contributions by employer     $ 0 $ 0  
Defined benefit plan, expected future employer contributions, next fiscal year 0   0    
Defined benefit plan, benefit obligation, voluntary settlement, number of participants | participant   522   522  
Defined benefit plan, benefit obligation, lump sum payment for settlement   $ 22,600,000   $ 22,600,000  
Settlement gain $ 0 $ 0 $ 0 2,409,000  
Defined benefit plan, plan assets, period increase (decrease)       $ (22,600,000)