Financial Instruments and Risk Management (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended
	Jun. 23, 2012	Jun. 25, 2011	Sep. 24, 2011	Jun. 23, 2012 Derivatives not designated as hedging instruments [Member]	Jun. 25, 2011 Derivatives not designated as hedging instruments [Member]	Jun. 23, 2012 Derivatives not designated as hedging instruments [Member]	Jun. 25, 2011 Derivatives not designated as hedging instruments [Member]	Jun. 23, 2012 Derivatives in Cash Flow Hedging Relationships [Member]	Jun. 25, 2011 Derivatives in Cash Flow Hedging Relationships [Member]	Jun. 23, 2012 Derivatives in Cash Flow Hedging Relationships [Member]	Jun. 25, 2011 Derivatives in Cash Flow Hedging Relationships [Member]	Jun. 23, 2012 Interest expense [Member] Derivatives in Cash Flow Hedging Relationships [Member]	Jun. 25, 2011 Interest expense [Member] Derivatives in Cash Flow Hedging Relationships [Member]	Jun. 23, 2012 Interest expense [Member] Derivatives in Cash Flow Hedging Relationships [Member]	Jun. 25, 2011 Interest expense [Member] Derivatives in Cash Flow Hedging Relationships [Member]	Jun. 23, 2012 Commodity options [Member] Cost of products sold [Member] Derivatives not designated as hedging instruments [Member]	Jun. 25, 2011 Commodity options [Member] Cost of products sold [Member] Derivatives not designated as hedging instruments [Member]	Jun. 23, 2012 Commodity options [Member] Cost of products sold [Member] Derivatives not designated as hedging instruments [Member]	Jun. 25, 2011 Commodity options [Member] Cost of products sold [Member] Derivatives not designated as hedging instruments [Member]	Jun. 23, 2012 Commodity futures [Member] Cost of products sold [Member] Derivatives not designated as hedging instruments [Member]	Jun. 25, 2011 Commodity futures [Member] Cost of products sold [Member] Derivatives not designated as hedging instruments [Member]	Jun. 23, 2012 Commodity futures [Member] Cost of products sold [Member] Derivatives not designated as hedging instruments [Member]	Jun. 25, 2011 Commodity futures [Member] Cost of products sold [Member] Derivatives not designated as hedging instruments [Member]	Jun. 23, 2012 Interest rate swaps [Member] Derivatives in Cash Flow Hedging Relationships [Member]	Jun. 23, 2012 Interest rate swaps [Member] Derivatives in Cash Flow Hedging Relationships [Member]	Jun. 23, 2012 Derivatives not designated as hedging instruments [Member]	Sep. 24, 2011 Derivatives not designated as hedging instruments [Member]	Jun. 23, 2012 Derivatives not designated as hedging instruments [Member] Commodity options [Member] Other current assets [Member]	Sep. 24, 2011 Derivatives not designated as hedging instruments [Member] Commodity options [Member] Other current assets [Member]	Jun. 23, 2012 Derivatives not designated as hedging instruments [Member] Commodity options [Member] Other assets [Member]	Sep. 24, 2011 Derivatives not designated as hedging instruments [Member] Commodity options [Member] Other assets [Member]	Jun. 23, 2012 Derivatives not designated as hedging instruments [Member] Commodity options [Member] Other current liabilities [Member]	Sep. 24, 2011 Derivatives not designated as hedging instruments [Member] Commodity options [Member] Other current liabilities [Member]	Jun. 23, 2012 Derivatives not designated as hedging instruments [Member] Commodity options [Member] Other liabilities [Member]	Sep. 24, 2011 Derivatives not designated as hedging instruments [Member] Commodity options [Member] Other liabilities [Member]	Jun. 23, 2012 Derivatives not designated as hedging instruments [Member] Commodity futures [Member]	Sep. 24, 2011 Derivatives not designated as hedging instruments [Member] Commodity futures [Member]	Jun. 23, 2012 Derivatives not designated as hedging instruments [Member] Commodity futures [Member] Other current assets [Member]	Sep. 24, 2011 Derivatives not designated as hedging instruments [Member] Commodity futures [Member] Other current assets [Member]	Jun. 23, 2012 Derivatives designated as hedging instruments [Member]	Sep. 24, 2011 Derivatives designated as hedging instruments [Member]	Jun. 23, 2012 Derivatives designated as hedging instruments [Member] Interest rate swaps [Member] Other current liabilities [Member]	Sep. 24, 2011 Derivatives designated as hedging instruments [Member] Interest rate swaps [Member] Other current liabilities [Member]	Jun. 23, 2012 Derivatives designated as hedging instruments [Member] Interest rate swaps [Member] Other liabilities [Member]	Sep. 24, 2011 Derivatives designated as hedging instruments [Member] Interest rate swaps [Member] Other liabilities [Member]
Financial Instruments and Risk Management [Abstract]
Maximum maturity period of highly liquid investment considered as cash equivalents	3 months
Margin over LIBOR Rate (in hundredths)	1.00%
Derivatives, Fair Value [Line Items]
Fair value - assets																												$ 7,263	$ 3,710	$ 0	$ 612					$ 9,215	$ 5,454	$ 1,952	$ 1,132
Fair value - liabilities																										1,338	2,476					1,338	2,407	0	69					4,822	4,596	2,646	2,662	2,176	1,934
Asset Fair Value Measurement Using Significant Unobservable Inputs (Level 3 ) [Roll Forward]
Opening balance of over-the-counter options	1,780	1,509
Beginning balance realized during the period	(758)	(1,509)
Contracts purchased during the period	3,245	2,778
Change in the fair value of beginning balance	2,678	0
Closing balance of over-the-counter options	6,945	2,778
Liability Fair Value Measurement Using Significant Unobservable Inputs (Level 3 ) [Roll Forward]
Opening balance of over-the-counter options	118	29
Beginning balance realized during the period	(15)	(29)
Contracts purchased during the period	259	226
Change in the fair value of beginning balance	669	0
Closing balance of over-the-counter options	1,031	226
Weighted average maturity of outstanding commodity-related derivatives	3 months		4 months
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Unrealized Gains (Losses) Recognized in Income				8,218	(313)	7,170	2,237									6,465	(516)	6,350	283	1,753	203	820	1,954
Gains (Losses) Recognized in OCI (Effective Portion)								(1,856)	(1,077)	(2,234)	(851)													(1,856)	(2,234)
Gains (Losses) Reclassified from Accumulated OCI into Income (Effective Portion)								(670)	(719)	(2,008)	(2,147)	(670)	(719)	(2,008)	(2,147)
Fair Value of 2020 Senior Notes	$ 262,500		$ 248,500