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Contingent liabilities and legal proceedings - Other matters in relation to USL (Details)	12 Months Ended
	Jun. 30, 2021
United Spirits Limited
Disclosure of contingent liabilities [line items]
Shares percentage of additional equivalent payments required to be made to shareholders	0.04%

X

- Definition

Shares percentage of additional equivalent payments required to be made to shareholders.

+ References

No definition available.

+ Details

Name:	deo_SharesPercentageOfAdditionalEquivalentPaymentsRequiredToBeMadeToShareholders
Namespace Prefix:	deo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfContingentLiabilitiesLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=deo_UnitedSpiritsLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: