Goodwill and Other Intangible Assets - Carrying Values of Goodwill Assigned to Partnership's Operating Segments (Details) - USD ($) $ in Thousands	Sep. 26, 2015	Sep. 27, 2014
Goodwill [Line Items]
Goodwill	$ 1,093,891	$ 1,093,891
Accumulated adjustments	(6,462)	(6,462)
Goodwill, net	1,087,429	1,087,429
Propane [Member]
Goodwill [Line Items]
Goodwill	1,075,091	1,075,091
Goodwill, net	1,075,091	1,075,091
Fuel Oil and Refined Fuels [Member]
Goodwill [Line Items]
Goodwill	10,900	10,900
Accumulated adjustments	(6,462)	(6,462)
Goodwill, net	4,438	4,438
Natural Gas and Electricity [Member]
Goodwill [Line Items]
Goodwill	7,900	7,900
Goodwill, net	$ 7,900	$ 7,900