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Document and Entity Information (USD $)
 12 Months Ended
Mar. 30, 2013
Document And Entity Information [Abstract]  
Entity Registrant Name MONRO MUFFLER BRAKE INC
Entity Central Index Key 0000876427
Document Type 10-K
Document Period End Date Mar. 30, 2013
Amendment Flag false
Document Fiscal Year Focus 2013
Document Fiscal Period Focus FY
Current Fiscal Year End Date --03-30
Entity Well Known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Filer Category Large Accelerated Filer
Entity Public Float $ 1,021,500,000
Entity Common Stock Shares Outstanding 31,267,245