Acres of land purchased by the Company on which its office/warehouse facility is located.

No definition available.

Name:	mnro_AcresOfLandPurchased
Namespace Prefix:	mnro_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount financed for properties with capital leases and financing obligations.

+ References

No definition available.

+ Details

Name:	mnro_AdditionalFinancingForPropertiesWithCapitalLeases
Namespace Prefix:	mnro_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The total amount of land purchased by the Company on which its office/warehouse facility is located.

+ References

No definition available.

+ Details

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

- Definition

Line of credit facility, Change in potential increase in capacity

+ References

No definition available.

+ Details

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

- Definition

The maximum allowed percentage of the preceding year's net income permitted to be paid as a cash dividend.

+ References

No definition available.

+ Details

Name:	mnro_LineOfCreditFacilityDividend
Namespace Prefix:	mnro_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Increase in borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

No definition available.

+ Details

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

- Definition

Revolving credit facility agreement, number of participating banks.

+ References

No definition available.

+ Details

Name:	mnro_LineOfCreditFacilityNumberOfBanks
Namespace Prefix:	mnro_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of cost of land on which the Company's office/warehouse facility is located financed via a non-interest bearing mortgage.

+ References

No definition available.

+ Details

Name:	mnro_PercentageOfLandFinancedWithNonInterestMortgage
Namespace Prefix:	mnro_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of non-interest bearing mortgage.

+ References

No definition available.

+ Details

Name:	mnro_PeriodOfNonInterestBearingMortgage
Namespace Prefix:	mnro_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Accordion feature of credit facility permitting additional increase in availability.

+ References

No definition available.

+ Details

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

- Definition

Revolving credit facility agreement term.

+ References

No definition available.

+ Details

Name:	mnro_RevolvingCreditFacilityPeriod
Namespace Prefix:	mnro_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of years that the Credit Facility was extended.

+ References

No definition available.

+ Details

Name:	mnro_Termextensionofcreditfacility
Namespace Prefix:	mnro_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ 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 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for a specific purpose other than for financing goods acquired for inventory or imminent delivery to a customer.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20, 22
-Article 5

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_CreditFacilityAxis=mnro_RevolvingCreditFacilityJune2011Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=mnro_RevolvingCreditFacilityDecember2012Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=mnro_SeniorSecuredRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioActualMember
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Balance Type:
Period Type:

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Long-Term Debt, Capital Leases And Financing Obligations (Narrative) (Details)	12 Months Ended
	Mar. 26, 2016 USD ($) entity item	Mar. 28, 2015 USD ($)	Mar. 31, 1995 USD ($) a
Debt Instrument [Line Items]
Net availability under the credit facility	$ 473,000,000
Carrying amount of long-term debt (including current portion)	103,315,000	$ 122,543,000
Fair value of long-term debt (including current portion)	103,300,000	$ 122,500,000
The total amount financed for properties with capital leases and financing obligations	177,000,000
Acres of land purchased \| a			12.7
Purchase price of land purchased			$ 700,000
Percentage of land purchased via a non-interest mortgage			100.00%
Period of non-interest bearing mortgage			20 years
Revolving Credit Facility, June 2011 [Member]
Debt Instrument [Line Items]
Revolving credit facility agreement	175,000,000
Credit Facility Increased Availability	$ 75,000,000
Revolving credit facility agreement term	5 years
Revolving credit facility agreement, number of participating banks \| item	7
Revolving Credit Facility, December 2012 [Member]
Debt Instrument [Line Items]
Revolving credit facility agreement	$ 250,000,000
Credit Facility Increased Availability	$ 75,000,000
Debt Instrument, Maturity Date	Dec. 01, 2017
Provision allowing to expand the amount of overall facility	$ 75,000,000
Term extension of credit facility	1 year 6 months
Revolving Credit Facility, January 2016 [Member]
Debt Instrument [Line Items]
Revolving credit facility agreement	$ 600,000,000
Credit Facility Increased Availability	$ 350,000,000
Revolving credit facility agreement term	5 years
Revolving credit facility agreement, number of participating banks \| entity	9
Provision allowing to expand the amount of overall facility	$ 100,000,000
Credit facility, Change in increased availability	25,000,000
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Line of credit sub-facility for issuing standby letters of credit	80,000,000
Letters of credit outstanding	$ 23,700,000
Minimum [Member] \| Revolving Credit Facility, January 2016 [Member]
Debt Instrument [Line Items]
Interest rate over LIBOR on the facility	0.75%
Percentage of face amount of standby letter of credit payable as fees	0.15%
Minimum [Member] \| Revolving Credit Facility, January 2016 [Member] \| Scenario, Actual [Member]
Debt Instrument [Line Items]
Interest rate over LIBOR on the facility	1.00%	1.00%
Minimum [Member] \| Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Percentage of face amount of standby letter of credit payable as fees	0.875%
Maximum [Member]
Debt Instrument [Line Items]
Percentage of net income permit as cash dividend, maximum	50.00%
Maximum [Member] \| Revolving Credit Facility, January 2016 [Member]
Debt Instrument [Line Items]
Interest rate over LIBOR on the facility	1.75%
Percentage of face amount of standby letter of credit payable as fees	0.35%
Maximum [Member] \| Revolving Credit Facility, January 2016 [Member] \| Scenario, Actual [Member]
Debt Instrument [Line Items]
Interest rate over LIBOR on the facility	1.25%	1.25%
Maximum [Member] \| Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Percentage of face amount of standby letter of credit payable as fees	1.875%