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Stock Ownership (Narrative) (Details) - $ / shares	12 Months Ended
	Mar. 26, 2016	Mar. 28, 2015
Stock Ownership [Abstract]
Common stock shares authorized	65,000,000	65,000,000
Class C convertible preferred stock, conversion value	$ 0.064	$ 0.064
Distribution amount per share of preferred stock on liquidation of company	$ 1.50
Minimum percentage of preferred stock holders approval for authorization of action	60.00%

X

- Definition

Distribution amount per share of preferred stock on liquidation of company.

+ References

No definition available.

+ Details

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Namespace Prefix:	mnro_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Minimum percentage of preferred stock holders approval for authorization of action.

+ References

No definition available.

+ Details

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Namespace Prefix:	mnro_
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Balance Type:	na
Period Type:	duration

X

- Definition

The rate at which the preferred stock can be converted into common stock.

+ References

No definition available.

+ Details

Name:	mnro_PreferredStockConversionRate
Namespace Prefix:	mnro_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Stock Ownership.

+ References

No definition available.

+ Details

Name:	mnro_StockOwnershipAbstract
Namespace Prefix:	mnro_
Data Type:	xbrli:stringItemType
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X

- 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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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant