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Leases - Future cash outflow not reflected in lease liability - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023
Lease [Abstract] |  |
Future cash outflows not included in lease liabilities in respect of extension and termination options which are not reasonably expected to be exercised | $ 262 | $ 329

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- Definition Lease [Abstract] + References No definition available. + Details
Name: | deo_LeaseAbstract
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