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Financial Instruments and Risk Management - Fair Value of the Partnership's Derivative Instruments and their Location in the Condensed Consolidated Balance Sheets (Details) - USD ($)
$ in Thousands
Mar. 29, 2025
Sep. 28, 2024
Commodity-Related Derivatives [Member]    
Derivatives, Fair Value [Line Items]    
Fair value - assets $ 2,260 $ 13,649
Fair value - liabilities 1,597 14,502
Derivatives Not Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Fair value - assets 1,412 4,891
Fair value - liabilities 749 5,744
Derivatives Not Designated as Hedging Instruments [Member] | Commodity-Related Derivatives [Member] | Other Current Assets [Member]    
Derivatives, Fair Value [Line Items]    
Fair value - assets 1,412 4,122
Derivatives Not Designated as Hedging Instruments [Member] | Commodity-Related Derivatives [Member] | Other Assets [Member]    
Derivatives, Fair Value [Line Items]    
Fair value - assets 0 769
Derivatives Not Designated as Hedging Instruments [Member] | Commodity-Related Derivatives [Member] | Other Current Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Fair value - liabilities 749 5,744
Derivatives Not Designated as Hedging Instruments [Member] | Commodity-Related Derivatives [Member] | Other Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Fair value - liabilities $ 0 $ 0