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Stock Ownership (Narrative) (Details) (USD $) | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 28, 2015 | Mar. 29, 2014 | Mar. 12, 2012
Common stock shares authorized | 65,000,000 us-gaap_CommonStockSharesAuthorized | 65,000,000 us-gaap_CommonStockSharesAuthorized |
Class C convertible preferred stock, conversion value | $ 0.064 mnro_PreferredStockConversionRate | $ 0.064 mnro_PreferredStockConversionRate |
Distribution amount per share of preferred stock on liquidation of company | $ 1.50 mnro_DistributionAmountPerShareOfPreferredStockOnLiquidationOfCompany |  |
Minimum percentage of preferred stock holders approval for authorization of action | 60.00%mnro_MinimumPercentageOfPreferredStockHoldersApprovalForAuthorizationOfAction |  |
Before Amendment [Member] |  |  |
Common stock shares authorized |  |  | 45,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementScenarioAxis = mnro_BeforeResolutionToAmendMember
After Amendment [Member] |  |  |
Common stock shares authorized |  |  | 65,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementScenarioAxis = mnro_AfterAmendmentMember

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- Definition Distribution amount per share of preferred stock on liquidation of company. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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- Definition Minimum percentage of preferred stock holders approval for authorization of action. + References No definition available. + Details
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Period Type: | duration

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- Definition The rate at which the preferred stock can be converted into common stock. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Details
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- Details
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Balance Type: |
Period Type: |