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. 24, 2022	Sep. 25, 2021
Derivatives, Fair Value [Line Items]
Fair value - assets	$ 117,260	$ 76,508
Fair value - liabilities	101,419	32,023
Commodity-Related Derivatives [Member]
Derivatives, Fair Value [Line Items]
Fair value - assets	117,260	76,508
Fair value - liabilities	101,419	32,023
Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Fair value - assets	34,693	54,832
Fair value - liabilities	18,852	10,347
Derivatives Not Designated as Hedging Instruments [Member] | Commodity-Related Derivatives [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value - assets	18,263	53,019
Derivatives Not Designated as Hedging Instruments [Member] | Commodity-Related Derivatives [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value - assets	16,430	1,813
Derivatives Not Designated as Hedging Instruments [Member] | Commodity-Related Derivatives [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value - liabilities	16,957	8,715
Derivatives Not Designated as Hedging Instruments [Member] | Commodity-Related Derivatives [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value - liabilities	$ 1,895	$ 1,632