Leases - Schedule of lease liabilities (Details) - GBP (£) £ in Millions	Jun. 30, 2020	Jul. 01, 2019	Jun. 30, 2019
Lease liabilities [abstract]
Current lease liabilities	£ (106)	£ (107)
Current finance lease liability			£ (43)
Non-current lease liabilities	(364)	(272)
Non-current finance lease liabilities			(85)
Lease liabilities	£ (470)	£ (379)
Finance lease liabilities			£ (128)

Current Finance Lease Liability

No definition available.

Name:	deo_CurrentFinanceLeaseLiability
Namespace Prefix:	deo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Finance Lease Liabilities

+ References

No definition available.

+ Details

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Namespace Prefix:	deo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Non Current Finance Lease Liabilities

+ References

No definition available.

+ Details

Name:	deo_NonCurrentFinanceLeaseLiabilities
Namespace Prefix:	deo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of current lease liabilities. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 47
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2019-03-27

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

+ References

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of non-current lease liabilities. [Refer: Lease liabilities]

+ References

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant