Document and Entity Information - shares	3 Months Ended
	Jun. 25, 2016	Jul. 22, 2016
Document And Entity Information [Abstract]
Entity Registrant Name	MONRO MUFFLER BRAKE INC
Entity Central Index Key	0000876427
Document Type	10-Q
Document Period End Date	Jun. 25, 2016
Amendment Flag	false
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--03-25
Entity Filer Category	Large Accelerated Filer
Entity Common Stock Shares Outstanding		32,288,870