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Financial Instruments and Risk Management - Effect of the Partnership's Derivative Instruments on the Consolidated Statements of Operations (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 24, 2022 | Sep. 25, 2021 | Sep. 26, 2020
Commodity-Related Derivatives [Member] | Cost of Products Sold [Member] | Derivatives Not Designated as Hedging Instruments [Member] |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |
Unrealized Gains (Losses) Recognized in Income | $ (27,929) | $ 43,121 | $ (382)

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