Debt Instrument Basis Spread On Variable Rate Increase

No definition available.

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Namespace Prefix:	mnro_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument interest coverage ratio.

+ References

No definition available.

+ Details

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- Definition

Line of credit facility, Change in potential increase in capacity

+ References

No definition available.

+ Details

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Namespace Prefix:	mnro_
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Period Type:	duration

- Definition

Minimum liquidity require to declare dividends.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Minimum Liquidity Requirement After Completing Acquisition

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Number of additional banks added to the bank syndicate.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Number of banks involved in credit facility

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Percent of Adjusted Debt to Earnings Before Interest, Taxes, Depreciation, Amortization, and Restructuring.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Ratio of Adjusted Debt to Earnings Before Interest, Taxes, Depreciation, Amortization, and Restructuring.

+ References

No definition available.

+ Details

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Namespace Prefix:	mnro_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Ratio of dividend declare.

+ References

No definition available.

+ Details

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Namespace Prefix:	mnro_
Data Type:	xbrli:pureItemType
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

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types: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.

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+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Indicates type of variable interest rate on debt instrument.

+ References

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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
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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

- Definition

Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

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

+ References

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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

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Long-Term Debt (Narrative) (Details) $ in Millions			1 Months Ended	6 Months Ended
Long-Term Debt (Narrative) (Details) $ in Millions	May 23, 2025 USD ($)	May 23, 2024 USD ($)	Nov. 30, 2022	Sep. 27, 2025 USD ($) entity	Mar. 29, 2025 USD ($)	Apr. 30, 2019 USD ($)
Debt Instrument [Line Items]
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]				us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility term				5 years
Revolving credit facility agreement	$ 500.0			$ 600.0		$ 600.0
Credit facility, Potential increased availability				250.0
Amount outstanding under credit facility				60.0	$ 61.3
Net availability under the credit facility				$ 409.9	$ 508.7
Initial Credit Facility [Member]
Debt Instrument [Line Items]
Number of banks involved in credit facility \| entity				8
Third Amendment To Credit Facility Member
Debt Instrument [Line Items]
Number of banks involved in credit facility \| entity				9
Number of additional banks added to the bank syndicate \| entity				1
Basis spread				0.10%
Interest coverage ratio			1.55
Ratio of adjusted debt to EBITDAR			4.75
Fifth Amendment To Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate basis point increase		2.25%
Interest coverage ratio	1.55
Minimum liquidity require to declare dividends		$ 300.0
Minimum liquidity requirement after completing acquisition		$ 300.0
Ratio of adjusted debt to EBITDAR	4.75
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Revolving credit facility agreement				$ 80.0
Letters of credit outstanding				$ 30.1
Minimum [Member] \| Fifth Amendment To Credit Facility [Member]
Debt Instrument [Line Items]
Ratio of dividend declare		0.25
Minimum [Member] \| Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Percentage of fees on amount available				0.875%
Maximum [Member] \| Fifth Amendment To Credit Facility [Member]
Debt Instrument [Line Items]
Interest coverage ratio	5.00
Ratio of dividend declare		0.50
Maximum [Member] \| Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Percentage of fees on amount available				2.125%
First Quarter Of Fiscal 2025 Through The Fourth Quarter Of Fiscal 2026 [Member] \| Fourth Amendment To Credit Facility [Member]
Debt Instrument [Line Items]
Percent of adjusted debt to EBITDAR		20.00%
First Quarter of Fiscal 2026 Through the Third Quarter of Fiscal 2026 [Member] \| Fifth Amendment To Credit Facility [Member]
Debt Instrument [Line Items]
Interest coverage ratio	1.15
Percent of adjusted debt to EBITDAR	20.00%
Fourth Quarter of Fiscal 2026 Through the First Quarter of Fiscal 2027 [Member] \| Fifth Amendment To Credit Facility [Member]
Debt Instrument [Line Items]
Interest coverage ratio	1.25
Second Quarter of Fiscal 2027 and Thereafter \| Fifth Amendment To Credit Facility [Member]
Debt Instrument [Line Items]
Interest coverage ratio	1.55
First Quarter of Fiscal 2027 and Thereafter \| Fourth Amendment To Credit Facility [Member]
Debt Instrument [Line Items]
Percent of adjusted debt to EBITDAR		15.00%
First Quarter of Fiscal 2027 and Thereafter \| Fifth Amendment To Credit Facility [Member]
Debt Instrument [Line Items]
Percent of adjusted debt to EBITDAR	15.00%