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Operating Leases and Other Commitments (Narrative) (Details) (USD $)
 12 Months Ended 0 Months Ended
Mar. 28, 2015
Mar. 29, 2014
Mar. 30, 2013
Oct. 01, 2012
Feb. 28, 2014
Aug. 27, 2014
Oct. 01, 2015
Oct. 01, 2014
Apr. 30, 2015
Aug. 31, 2014
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]                    
Vesting period of employee options 4 years                  
Rent expense under operating leases, net of sublease income $ 35,541,000us-gaap_OperatingLeasesRentExpenseNet $ 32,841,000us-gaap_OperatingLeasesRentExpenseNet $ 32,204,000us-gaap_OperatingLeasesRentExpenseNet              
Contingent rentals 44,000us-gaap_OperatingLeasesRentExpenseContingentRentals 59,000us-gaap_OperatingLeasesRentExpenseContingentRentals 85,000us-gaap_OperatingLeasesRentExpenseContingentRentals              
Sublease income 468,000us-gaap_OperatingLeasesRentExpenseSubleaseRentals1 533,000us-gaap_OperatingLeasesRentExpenseSubleaseRentals1 636,000us-gaap_OperatingLeasesRentExpenseSubleaseRentals1              
Percentage of annual purchases of specific products bought from entering contracts 100.00%mnro_PurchaseCommitmentAnnualPurchasePercentage                  
Maximum purchase commitment expiration date July 2017                  
Chief Executive Officer [Member]                    
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]                    
Stated base salary per agreement       550,000mnro_StatedBaseSalaryPerAgreement
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember		            
Number of stock options awarded       300,000mnro_StockOptionsAwarded
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember		            
Stock option exercise price       $ 33.64mnro_StockOptionsAwardedExercisePricePerShare
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember		            
New employment agreement period       5 years            
Vesting period of employee options       4 years            
Executive Vice President [Member]                    
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]                    
Stated base salary per agreement         242,500mnro_StatedBaseSalaryPerAgreement
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ExecutiveVicePresidentMember		          
Employment Period Start Date         Apr. 01, 2014          
Employment Period End Date         Jun. 01, 2017          
Executive Vice President And Chief Financial Officer [Member]                    
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]                    
Stated base salary per agreement                 375,000mnro_StatedBaseSalaryPerAgreement
/ us-gaap_TitleOfIndividualAxis
= mnro_ExecutiveVicePresidentAndChiefFinancialOfficerMember		 350,200mnro_StatedBaseSalaryPerAgreement
/ us-gaap_TitleOfIndividualAxis
= mnro_ExecutiveVicePresidentAndChiefFinancialOfficerMember
Number of stock options awarded           35,000mnro_StockOptionsAwarded
/ us-gaap_TitleOfIndividualAxis
= mnro_ExecutiveVicePresidentAndChiefFinancialOfficerMember		        
Stock option exercise price           $ 52.82mnro_StockOptionsAwardedExercisePricePerShare
/ us-gaap_TitleOfIndividualAxis
= mnro_ExecutiveVicePresidentAndChiefFinancialOfficerMember		        
Option term 5 years                  
Vesting period of employee options           4 years        
Executive Chairman [Member]                    
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]                    
Stated base salary per agreement       420,000mnro_StatedBaseSalaryPerAgreement
/ us-gaap_TitleOfIndividualAxis
= mnro_ExecutiveChairmanMember		     120,000mnro_StatedBaseSalaryPerAgreement
/ us-gaap_TitleOfIndividualAxis
= mnro_ExecutiveChairmanMember		 360,000mnro_StatedBaseSalaryPerAgreement
/ us-gaap_TitleOfIndividualAxis
= mnro_ExecutiveChairmanMember		    
Salary reduction               60,000mnro_SalaryReduction
/ us-gaap_TitleOfIndividualAxis
= mnro_ExecutiveChairmanMember		    
New employment agreement period       3 years     3 years      
Total amount of additional bonus payable in five annual installments       750,000mnro_StatedTotalAmountOfAdditionalBonusPayableAnnualInstallments
/ us-gaap_TitleOfIndividualAxis
= mnro_ExecutiveChairmanMember		            
Future additional bonus payable per annum installment       $ 150,000mnro_FutureAdditionalBonusPayablePerAnnumInstallment
/ us-gaap_TitleOfIndividualAxis
= mnro_ExecutiveChairmanMember