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. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Interest Rate Swaps [Member] \| Interest Expense [Member] \| Derivatives Designated as Hedging Instruments [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gains (Losses) Recognized in OCI (Effective Portion)	$ 0	$ 0	$ (10)
Gains (Losses) Reclassified from Accumulated OCI into Income (Effective Portion)	0	0	(215)
Commodity-Related Derivatives [Member] \| Cost of Products Sold [Member] \| Derivatives Not Designated as Hedging Instruments [Member]
Derivative Instruments Gain Loss [Line Items]
Unrealized (Losses) Gains Recognized in Income	$ (8,008)	$ 310	$ 6,277

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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-Publisher FASB
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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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