Document and Entity Information - shares	6 Months Ended
	Mar. 25, 2017	May 01, 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		61,078,243
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q2
Document Type	10-Q
Trading Symbol	SPH
Amendment Flag	false
Document Period End Date	Mar. 25, 2017