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Leases - Future cash outflow not reflected in lease liability - Narrative (Details) £ in Millions	12 Months Ended
	Jun. 30, 2021 GBP (£)
Leases [Abstract]
Future cash outflows not included in lease liabilities in respect of extension and termination options	£ 255

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- Definition

Leases [Abstract]

+ References

No definition available.

+ Details

Name:	deo_LeasesAbstract
Namespace Prefix:	deo_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Potential Exposure To Future Cash Outflow Arising from Extension Options And Termination Options Not Reflected In Measurement Of Lease Liability

+ References

No definition available.

+ Details

Name:	deo_PotentialExposureToFutureCashOutflowArisingfromExtensionOptionsAndTerminationOptionsNotReflectedInMeasurementOfLeaseLiability
Namespace Prefix:	deo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration