Name:	mnro_BusinessAcquisitionPurchasePriceAllocationGoodwillAmount1
Namespace Prefix:	mnro_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity.

No definition available.

Name:	mnro_BusinessCombinationBargainPurchaseGainRecognizedAmountOriginal
Namespace Prefix:	mnro_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

No authoritative reference available.

No definition available.

Name:	mnro_BusinessCombnationCostOfAcquiredEntityCashPaid
Namespace Prefix:	mnro_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of goodwill adjustment during reporting period from FY 2014 acquisitions.

No definition available.

Name:	mnro_GoodwillPurchasePriceAdjustment1
Namespace Prefix:	mnro_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	mnro_SupplementalCashFlowLineItems
Namespace Prefix:	mnro_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of assets acquired at the acquisition date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of liabilities assumed at the acquisition date.