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Significant Accounting Policies (Company's sales mix) (Details)	12 Months Ended
	Mar. 28, 2015	Mar. 29, 2014	Mar. 30, 2013
Company's sales mix
Revenue recognition	100.00%mnro_SalesRevenueGoodsNetPercentage1	100.00%mnro_SalesRevenueGoodsNetPercentage1	100.00%mnro_SalesRevenueGoodsNetPercentage1
Brakes [Member]
Company's sales mix
Revenue recognition	15.00%mnro_SalesRevenueGoodsNetPercentage1 / us-gaap_ProductOrServiceAxis = mnro_BrakesMember	15.00%mnro_SalesRevenueGoodsNetPercentage1 / us-gaap_ProductOrServiceAxis = mnro_BrakesMember	15.00%mnro_SalesRevenueGoodsNetPercentage1 / us-gaap_ProductOrServiceAxis = mnro_BrakesMember
Exhaust [Member]
Company's sales mix
Revenue recognition	3.00%mnro_SalesRevenueGoodsNetPercentage1 / us-gaap_ProductOrServiceAxis = mnro_ExhaustMember	4.00%mnro_SalesRevenueGoodsNetPercentage1 / us-gaap_ProductOrServiceAxis = mnro_ExhaustMember	4.00%mnro_SalesRevenueGoodsNetPercentage1 / us-gaap_ProductOrServiceAxis = mnro_ExhaustMember
Steering [Member]
Company's sales mix
Revenue recognition	10.00%mnro_SalesRevenueGoodsNetPercentage1 / us-gaap_ProductOrServiceAxis = mnro_SteeringMember	9.00%mnro_SalesRevenueGoodsNetPercentage1 / us-gaap_ProductOrServiceAxis = mnro_SteeringMember	10.00%mnro_SalesRevenueGoodsNetPercentage1 / us-gaap_ProductOrServiceAxis = mnro_SteeringMember
Tires [Member]
Company's sales mix
Revenue recognition	44.00%mnro_SalesRevenueGoodsNetPercentage1 / us-gaap_ProductOrServiceAxis = mnro_TiresMember	44.00%mnro_SalesRevenueGoodsNetPercentage1 / us-gaap_ProductOrServiceAxis = mnro_TiresMember	42.00%mnro_SalesRevenueGoodsNetPercentage1 / us-gaap_ProductOrServiceAxis = mnro_TiresMember
Maintenance [Member]
Company's sales mix
Revenue recognition	28.00%mnro_SalesRevenueGoodsNetPercentage1 / us-gaap_ProductOrServiceAxis = mnro_MaintenanceMember	28.00%mnro_SalesRevenueGoodsNetPercentage1 / us-gaap_ProductOrServiceAxis = mnro_MaintenanceMember	29.00%mnro_SalesRevenueGoodsNetPercentage1 / us-gaap_ProductOrServiceAxis = mnro_MaintenanceMember

X

- Definition

The percentage of net product revenue to total net revenue from the sale of goods as of year end.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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Period Type:	duration

X

- Details

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X

- Details

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Balance Type:
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X

- Details

Name:	us-gaap_ProductOrServiceAxis=mnro_ExhaustMember
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Period Type:

X

- Details

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X

- Details

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X

- Details

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Period Type: