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POSTRETIREMENT AND POSTEMPLOYMENT BENEFITS - Narrative (Details)
$ in Thousands
12 Months Ended
Sep. 29, 2024
USD ($)
Sep. 24, 2023
USD ($)
Sep. 25, 2022
USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Amortization of prior service cost (credit) expected to be recognized during the next fiscal year $ 800    
Other Postretirement Benefits Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Net actuarial gain expected to be recognized in net periodic pension cost during next fiscal year 1,200    
Amortization of prior service cost (credit) expected to be recognized during the next fiscal year $ 300    
Assumptions used calculating net periodic benefit cost, expected long-term rate of return on plan assets 5.00% 5.00% 5.00%
Non-current assets $ 23,300 $ 21,565  
Expected future employer contributions, next fiscal year 0    
Postemployment benefit obligation 10,217 11,252 $ 12,287
Other Postretirement Benefits Plan | U.S. Small Cap Value Equity Common/Collective Fund      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Investment in equity securities measured at fair value, recognized in net income 0 900  
Other Postretirement Benefits Plan | Global Equity Long/Short Common/Collective Hedge Fund-of-funds      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Investment in equity securities measured at fair value, recognized in net income $ 200 3,000  
Maximum percentage of equity investment redeemable 0.90    
Other Postretirement Benefits Plan | Global Equity Long/Short Common/Collective Hedge Fund-of-funds | Minimum      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Notice for redemption of equity investment 90 days    
Other Postretirement Benefits Plan | Global Equity Long/Short Common/Collective Hedge Fund-of-funds | Maximum      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Notice for redemption of equity investment 120 days    
Other Postretirement Benefits Plan | Level 3      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Purchases, sales or transfers of assets classified as level 3 $ 0 0  
Postemployment Retirement Benefits      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Curtailment gain 1,184 0 $ 0
Postemployment benefit obligation 1,600 1,600  
Retiree Medical Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Non-current assets 500 400  
Medical Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Curtailment gain 1,200    
Non-current assets $ 23,300 $ 21,565