Financial Instruments and Risk Management - Effect of the Partnership's Derivative Instruments on the Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 30, 2018	Jun. 24, 2017	Jun. 30, 2018	Jun. 24, 2017
Interest Rate Swaps [Member] \| Derivatives Designated as Hedging Instruments [Member]
Derivative Instruments Gain Loss [Line Items]
Gains (Losses) Recognized in OCI (Effective Portion)	$ 0	$ 0	$ 0	$ (10)
Interest Rate Swaps [Member] \| Derivatives Designated as Hedging Instruments [Member] \| Interest Expense [Member]
Derivative Instruments Gain Loss [Line Items]
Gains (Losses) Reclassified from Accumulated OCI into Income	0	0	0	(215)
Commodity-Related Derivatives [Member] \| Derivatives Not Designated as Hedging Instruments [Member] \| Cost of Products Sold [Member]
Derivative Instruments Gain Loss [Line Items]
Unrealized Gains (Losses) Recognized in Income	$ 3,806	$ (655)	$ (1,421)	$ (2,708)

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
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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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