Document and Entity Information - shares	9 Months Ended
	Jun. 27, 2015	Aug. 03, 2015
Document And Entity Information [Abstract]
Entity Registrant Name	SUBURBAN PROPANE PARTNERS LP
Entity Central Index Key	0001005210
Current Fiscal Year End Date	--09-26
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		60,531,070
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Document Type	10-Q
Trading Symbol	SPH
Amendment Flag	false
Document Period End Date	Jun. 27, 2015