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Document and Entity Information - shares	9 Months Ended
	Dec. 26, 2015	Jan. 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	Dec. 26, 2015
Amendment Flag	false
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--03-26
Entity Filer Category	Large Accelerated Filer
Entity Common Stock Shares Outstanding		32,194,656

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