Long-Term Borrowings (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	3 Months Ended		9 Months Ended			9 Months Ended				3 Months Ended	9 Months Ended			0 Months Ended	9 Months Ended			9 Months Ended		3 Months Ended	9 Months Ended					9 Months Ended
	Aug. 01, 2012	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013	Sep. 28, 2013	Jun. 28, 2014 Amended Credit Agreement Due 2017 [Member]	Jun. 28, 2014 Amended Credit Agreement Due 2017 [Member] LIBOR [Member]	Jun. 28, 2014 Amended Credit Agreement Due 2017 [Member] Federal Funds Rate [Member]	Aug. 01, 2012 364-Day Facility [Member]	Mar. 29, 2014 Revolving Credit Facility [Member]	Jun. 28, 2014 Revolving Credit Facility [Member]	Sep. 28, 2013 Revolving Credit Facility [Member]	Jan. 05, 2012 Revolving Credit Facility [Member]	May 27, 2014 7.5% Senior Notes due October 1, 2018 [Member]	Jun. 28, 2014 7.5% Senior Notes due October 1, 2018 [Member]	Sep. 28, 2013 7.5% Senior Notes due October 1, 2018 [Member]	Aug. 01, 2012 7.5% Senior Notes due October 1, 2018 [Member]	Jun. 28, 2014 7.375% Senior Notes due March 15, 2020 [Member]	Sep. 28, 2013 7.375% Senior Notes due March 15, 2020 [Member]	Jun. 29, 2013 7.375% Senior Notes due August 1, 2021 [Member]	Jun. 28, 2014 7.375% Senior Notes due August 1, 2021 [Member]	Sep. 28, 2013 7.375% Senior Notes due August 1, 2021 [Member]	Aug. 06, 2013 7.375% Senior Notes due August 1, 2021 [Member]	Aug. 02, 2013 7.375% Senior Notes due August 1, 2021 [Member]	Aug. 01, 2012 7.375% Senior Notes due August 1, 2021 [Member]	Jun. 28, 2014 5.50% Senior Notes due June 1, 2024 [Member]	Sep. 28, 2013 5.50% Senior Notes due June 1, 2024 [Member]
Debt Instrument [Line Items]
Long-term borrowings		$ 1,243,297		$ 1,243,297		$ 1,245,237						$ 100,000	$ 100,000			$ 0	$ 525,171		$ 248,763	$ 248,600		$ 369,534	$ 371,466				$ 525,000	$ 0
Stated interest rate (in hundredths)																7.50%			7.375%			7.375%					5.50%
Maturity date												Jan. 05, 2017				Oct. 01, 2018			Mar. 15, 2020			Aug. 01, 2021					Jun. 01, 2024
Ownership interest in Suburban Energy Finance Corp (in hundredths)		100.00%		100.00%
Net unamortized premium																0	28,614					23,354	25,286
Net unamortized discount																			1,237	1,400
Date public offering completed																Aug. 01, 2012			Mar. 23, 2010			Aug. 01, 2012					May 27, 2014
Aggregate principal amount																496,557			250,000			503,443					525,000
Fair value of debt at acquisition date (in hundredths)																		106.875%								108.125%
Debt instrument repurchase amount																					157,263			23,863	133,400
Loss on the extinguishment of debt		(11,589)	0	(11,589)	0										11,589						2,144
Redemption premium and related fees															31,633						11,759
Write-off unamortized debt origination costs															5,230						2,064
Write-off unamortized premium															(25,274)						(11,678)
Percentage of principal amount at which debt was issued (in hundredths)																			99.136%								100.00%
Percentage of the principal amount repurchase offer under change of control provision (in hundredths)																101.00%			101.00%			101.00%					101.00%
Number of days after the consummation of the change of control that a rating decline may occur to trigger offer to repurchase debt																90 days			90 days			90 days					90 days
Revolving credit facility, term												5 years
Credit facility borrowings											55,000
Credit Facility, maximum amount										250,000		400,000		250,000
Standby letters of credit issued under the Revolving Credit Facility												53,681
Available borrowing capacity under Revolving Credit Facility												246,319
Revolving Credit Facility and Senior Notes covenants [Abstract]
Consolidated interest coverage ratio, minimum	2.0 to 1.0
Total consolidated leverage ratio, maximum				7.0 to 1.0
Consolidated interest coverage ratio commencing with second quarter of fiscal 2014, minimum				2.5 to 1.0
Consolidated fixed charge coverage ratio, minimum				1.75 to 1
Consolidated leverage ratio commencing with second quarter of fiscal 2013, minimum				4.75 to 1.0
Consolidated leverage ratio commencing with second quarter of fiscal 2013, during acquisition period, minimum				5.0 to 1.0
Description of variable rate basis								LIBOR	Federal Funds Rate
Margin over basis rate (in hundredths)				1.00%				1.00%	0.50%
Weighted average interest rate (in hundredths)							2.50%
Interest rate swap agreement [Abstract]
Effective date							Jun. 25, 2013
Termination date							Jan. 05, 2017
Fixed interest rate (in hundredths)							1.63%
Long-term debt maturities [Abstract]
Long-term debt maturities, 2014		0		0
Long-term debt maturities, 2015		0		0
Long-term debt maturities, 2016		0		0
Long-term debt maturities, 2017		100,000		100,000
Long-term debt maturities, 2018		0		0
Long-term debt maturities, 2019 and thereafter		$ 1,121,180		$ 1,121,180