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Summary of significant accounting policies - Segment reporting (Details)	12 Months Ended
	Jun. 30, 2018 segment
Segment reporting
Number of material segments	1

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	manu_IfrsNumberOfReportableSegments
Namespace Prefix:	manu_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

No definition available.

+ References

No definition available.

+ Details

Name:	manu_SegmentAbstract
Namespace Prefix:	manu_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration