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Defined Benefit Pension Plan - Narrative (Details)
 12 Months Ended
Sep. 28, 2025
USD ($)
plan
investment
Sep. 29, 2024
USD ($)
participant
Sep. 24, 2023
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Number of defined benefit plans | plan 1    
Amortization of prior service cost (credit) expected to be recognized during the next fiscal year $ 800,000    
Number of investments held | investment 11    
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, benefit obligation, voluntary settlement, number of participants | participant   522  
Defined benefit plan, benefit obligation, lump sum payment for settlement   $ 22,600,000  
Settlement gain $ 0 2,409,000 $ 0
Defined benefit plan, plan assets, period increase (decrease)   (22,600,000)  
Long-term return on plan assets 5.50%    
Expected future employer contributions, next fiscal year $ 0    
Defined benefit plan accrued liability 10,828,000 4,664,000  
Pension Plan | Return-seeking Fixed Income Common/Collective Fund | NAV      
Defined Benefit Plan Disclosure [Line Items]      
Investments, fair value disclosure, total 4,200,000    
Pension Plan | Private Real Estate Common/Collective Fund | NAV      
Defined Benefit Plan Disclosure [Line Items]      
Investments, fair value disclosure, total 4,500,000    
Pension Plan | U.S Long Duration Fixed Income Common/Collective Fund | NAV      
Defined Benefit Plan Disclosure [Line Items]      
Investments, fair value disclosure, total 3,100,000    
Pension Plan | U.S. Mid Duration Fixed Income Common/Collective Fund | NAV      
Defined Benefit Plan Disclosure [Line Items]      
Investments, fair value disclosure, total 6,200,000    
Pension Plan | Global Equity Long/Short Common/Collective Hedge Fund-of-funds | NAV      
Defined Benefit Plan Disclosure [Line Items]      
Investments, fair value disclosure, total 1,900,000    
Pension Plan | Global Equity Passive U.S. Large Cap Equity Common/Collective Fund | NAV      
Defined Benefit Plan Disclosure [Line Items]      
Investments, fair value disclosure, total 4,900,000    
Pension Plan | Global Equity Passive Non- U.S. Large Cap Equity Common/Collective Fund | NAV      
Defined Benefit Plan Disclosure [Line Items]      
Investments, fair value disclosure, total 1,300,000    
Pension Plan | Global Equity Passive U.S. Mid And Small Cap Equity Common/Collective Fund | NAV      
Defined Benefit Plan Disclosure [Line Items]      
Investments, fair value disclosure, total 800,000    
Pension Plan | Active U.S. And Non-U.S. Equity Common/Collective Fund | NAV      
Defined Benefit Plan Disclosure [Line Items]      
Investments, fair value disclosure, total 20,800,000    
Pension Plan | U.S. Intermediate Credit Common/Collective Fund | NAV      
Defined Benefit Plan Disclosure [Line Items]      
Investments, fair value disclosure, total 32,800,000    
Pension Plan | U.S. Long Credit Common/Collective Fund | NAV      
Defined Benefit Plan Disclosure [Line Items]      
Investments, fair value disclosure, total 102,500,000    
Other Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan accrued liability $ 500,000 $ 600,000