Document and Entity Information - shares	9 Months Ended
	Jun. 24, 2017	Jul. 31, 2017
Document And Entity Information [Abstract]
Entity Registrant Name	SUBURBAN PROPANE PARTNERS LP
Entity Central Index Key	0001005210
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		61,102,950
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Document Type	10-Q
Trading Symbol	SPH
Amendment Flag	false
Document Period End Date	Jun. 24, 2017