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Defined Benefit Pension Plans - Narrative (Details)
 1 Months Ended 12 Months Ended
Sep. 26, 2021
plan
Sep. 25, 2022
USD ($)
plan
Sep. 24, 2023
USD ($)
plan
Sep. 25, 2022
USD ($)
plan
Sep. 26, 2021
plan
Nov. 30, 2023
USD ($)
participant
Defined Benefit Plan Disclosure [Line Items]            
Number of defined benefit plans | plan 7   1   7  
Defined benefit plans, number of plans frozen | plan 2     4    
Defined benefit plan, number of frozen plans merged | plan       6    
Number of fully-funded defined benefit plans | plan   1   1    
Amortization of prior service cost (credit) expected to be recognized during the next fiscal year     $ 800,000      
Subsequent Event            
Defined Benefit Plan Disclosure [Line Items]            
Voluntary lump sum payment of future pension benefits           $ 22,600,000
Number of participants who have elected voluntary settlement | participant           522
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest            
Defined Benefit Plan Disclosure [Line Items]            
Decrease to accumulated other comprehensive income due to plan enhancements       $ 6,100,000    
Pension Plan            
Defined Benefit Plan Disclosure [Line Items]            
Non-cash curtailment gain     0 1,027,000    
Increase to net pension liability due to plan enhancements     0 6,077,000    
Decrease in plan liabilities due to purchase of annuities   $ 85,600,000        
Increase in defined benefit plan assets   81,400,000 $ 0 $ 81,377,000    
Settlement income charge   4,200,000        
Assumptions used calculating net periodic benefit cost, expected long-term rate of return on plan assets     5.00% 5.00% 5.90%  
Expected future employer contributions, next fiscal year     $ 0      
Defined benefit plan accrued liability   252,000 10,844,000 $ 252,000    
Pension Plan | U.S. Small Cap Value Equity Common/Collective Fund            
Defined Benefit Plan Disclosure [Line Items]            
Investment in equity securities measured at fair value, recognized in net income   2,200,000 2,300,000 2,200,000    
Pension Plan | Global Equity Long/Short Common/Collective Hedge Fund-of-funds            
Defined Benefit Plan Disclosure [Line Items]            
Investment in equity securities measured at fair value, recognized in net income   16,700,000 $ 11,700,000 16,700,000    
Maximum percentage of equity investment redeemable     0.90      
Pension Plan | Global Equity Long/Short Common/Collective Hedge Fund-of-funds | Minimum            
Defined Benefit Plan Disclosure [Line Items]            
Notice for redemption of equity investment     90 days      
Pension Plan | Global Equity Long/Short Common/Collective Hedge Fund-of-funds | Maximum            
Defined Benefit Plan Disclosure [Line Items]            
Notice for redemption of equity investment     120 days      
Pension Plan | Global Equity Long/Short Common/Collective Hedge Fund-of-funds 2            
Defined Benefit Plan Disclosure [Line Items]            
Investment in equity securities measured at fair value, recognized in net income   15,900,000 $ 12,700,000 15,900,000    
Maximum percentage of equity investment redeemable     0.50      
Other Pension Plan            
Defined Benefit Plan Disclosure [Line Items]            
Defined benefit plan accrued liability   $ 1,000,000 $ 600,000 $ 1,000,000