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Stock Ownership (Narrative) (Details) - $ / shares	12 Months Ended
	Mar. 25, 2017	Mar. 26, 2016
Stock Ownership [Abstract]
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

Name:	mnro_MinimumPercentageOfPreferredStockHoldersApprovalForAuthorizationOfAction
Namespace Prefix:	mnro_
Data Type:	num:percentItemType
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

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Namespace Prefix:	mnro_
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