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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, 2022 | Jun. 30, 2021 | Jun. 30, 2020
United Kingdom | Retiring currently at age 65 | Male |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 87.1 | 87.2 | 86.4
United Kingdom | Retiring currently at age 65 | Female |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 88.7 | 88.7 | 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 | 88.5 | 88.6 | 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 | 90.7 | 90.8 | 90.8
Ireland | Retiring currently at age 65 | Male |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 87.7 | 86.9 | 86.6
Ireland | Retiring currently at age 65 | Female |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 90.0 | 89.3 | 89.3
Ireland | Currently aged 45, retiring at age 65 | Male |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 89.3 | 88.6 | 89.6
Ireland | Currently aged 45, retiring at age 65 | Female |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 91.7 | 91.1 | 92.3
United States | Retiring currently at age 65 | Male |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 85.5 | 85.4 | 85.6
United States | Retiring currently at age 65 | Female |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Expected age at death of an average worker | 87.2 | 87.1 | 87.3
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 | 87.0 | 86.9 | 87.2
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 | 88.6 | 88.5 | 88.9

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

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

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- Details
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- Details
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- Details
Name: | ifrs-full_GeographicalAreasAxis=country_IE
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
Balance Type: |
Period Type: |