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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 | Sep. 30, 2023 | Sep. 24, 2022
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Derivatives, Fair Value [Line Items] |  |
Fair value - assets | $ 35,339 | $ 117,260
Fair value - liabilities | 24,004 | 101,419
Commodity-Related Derivatives [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Fair value - assets | 35,339 | 117,260
Fair value - liabilities | 24,004 | 101,419
Derivatives Not Designated as Hedging Instruments [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Fair value - assets | 18,546 | 34,693
Fair value - liabilities | 7,211 | 18,852
Derivatives Not Designated as Hedging Instruments [Member] | Commodity-Related Derivatives [Member] | Other Current Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Fair value - assets | 18,538 | 18,263
Derivatives Not Designated as Hedging Instruments [Member] | Commodity-Related Derivatives [Member] | Other Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Fair value - assets | 8 | 16,430
Derivatives Not Designated as Hedging Instruments [Member] | Commodity-Related Derivatives [Member] | Other Current Liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Fair value - liabilities | 2,427 | 16,957
Derivatives Not Designated as Hedging Instruments [Member] | Commodity-Related Derivatives [Member] | Other Liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Fair value - liabilities | $ 4,784 | $ 1,895

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