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Post employment benefits - Expected age at death of an average worker who retires currently at age 65, one who is currently aged 45 and subsequently retires at the age of 65 (Details) - yr | 12 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022
United Kingdom | Retiring currently at age 65 | Male |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 86.8 | 86.8 | 87.1
United Kingdom | Retiring currently at age 65 | Female |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 88.4 | 88.4 | 88.7
United Kingdom | Currently aged 45, retiring at age 65 | Male |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 88.1 | 88.1 | 88.5
United Kingdom | Currently aged 45, retiring at age 65 | Female |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 90.5 | 90.4 | 90.7
Ireland | Retiring currently at age 65 | Male |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 87.2 | 87.2 | 87.7
Ireland | Retiring currently at age 65 | Female |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 89.7 | 89.6 | 90.0
Ireland | Currently aged 45, retiring at age 65 | Male |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 88.8 | 88.8 | 89.3
Ireland | Currently aged 45, retiring at age 65 | Female |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 91.4 | 91.3 | 91.7
United States | Retiring currently at age 65 | Male |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 85.7 | 85.6 | 85.5
United States | Retiring currently at age 65 | Female |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 87.4 | 87.2 | 87.2
United States | Currently aged 45, retiring at age 65 | Male |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 87.2 | 87.1 | 87.0
United States | Currently aged 45, retiring at age 65 | Female |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 88.9 | 88.7 | 88.6

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- Definition The expected age at death of an average number of personnel employed by the entity during a period. + References No definition available. + Details
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Namespace Prefix: | deo_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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- Details
Name: | ifrs-full_ActuarialAssumptionsAxis=deo_ActuarialAssumptionOfLifeExpectancyAfterRetirementRetiringCurrentlyAtAgeSixtyFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Period Type: |

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- Details
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- Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_GeographicalAreasAxis=country_US
Namespace Prefix: |
Data Type: | na
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Period Type: |