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
Sep. 30, 2023	Sep. 24, 2022	Sep. 25, 2021
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	$ (3,671)	$ (27,929)	$ 43,121

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4E
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4E

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Period Type:	duration