Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 29, 2012	Sep. 24, 2011	Sep. 25, 2010
Goodwill [Abstract]
Goodwill	$ 1,098,761	$ 284,113
Accumulated adjustments	(6,462)	(6,462)
Goodwill, net	1,092,299	277,651
Goodwill acquired during fiscal 2012	814,648
Other intangible assets [Abstract]
Other intangible assets, gross	459,640	33,745
Accumulated amortization	(23,156)	(17,667)
Other intangible assets, net	436,484	16,078
Other intangible assets aggregate amortization expense [Abstract]
Aggregate amortization expense	10,553	3,260	2,423
Aggregate amortization expense for the five succeeding fiscal years [Abstract]
2013	47,570
2014	47,439
2015	47,277
2016	46,658
2017	45,758
Customer Relationships [Member]
Other intangible assets [Abstract]
Other intangible assets, gross	424,409	26,523
Accumulated amortization	(18,576)	(15,036)
Non-compete Agreements [Member]
Other intangible assets [Abstract]
Other intangible assets, gross	28,665	3,756
Accumulated amortization	(2,338)	(760)
Tradenames [Member]
Other intangible assets [Abstract]
Other intangible assets, gross	4,599	1,499
Accumulated amortization	(1,441)	(1,162)
Other [Member]
Other intangible assets [Abstract]
Other intangible assets, gross	1,967	1,967
Accumulated amortization	(801)	(709)
Propane [Member]
Goodwill [Abstract]
Goodwill	1,069,271	265,313
Accumulated adjustments	0	0
Goodwill, net	1,069,271	265,313
Goodwill acquired during fiscal 2012	803,958
Fuel Oil and Refined Fuels [Member]
Goodwill [Abstract]
Goodwill	21,590	10,900
Accumulated adjustments	(6,462)	(6,462)
Goodwill, net	15,128	4,438
Goodwill acquired during fiscal 2012	10,690
Natural Gas and Electricity [Member]
Goodwill [Abstract]
Goodwill	7,900	7,900
Accumulated adjustments	0	0
Goodwill, net	7,900	7,900
Goodwill acquired during fiscal 2012	$ 0