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Summary of Significant Accounting Policies - Summary of Estimated Useful Live of Assets Expected Utility (Detail) | 12 Months Ended
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Dec. 31, 2021
Point of sale furniture and equipment [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | 5 years
Vehicles [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | 5 years
Bottom of range [member] | Industrial buildings - other real estate properties [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | 20 years
Bottom of range [member] | Production plant and equipment production equipment [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | 10 years
Bottom of range [member] | Production plant and equipment storage, packaging and handling equipment [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | 5 years
Bottom of range [member] | Returnable packaging kegs [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | 2 years
Bottom of range [member] | Returnable packaging crates [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | 2 years
Bottom of range [member] | Returnable packaging bottles [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | 2 years
Bottom of range [member] | Information processing equipment [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | 3 years
Top of range [member] | Industrial buildings - other real estate properties [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | 50 years
Top of range [member] | Production plant and equipment production equipment [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | 15 years
Top of range [member] | Production plant and equipment storage, packaging and handling equipment [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | 7 years
Top of range [member] | Returnable packaging kegs [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | 10 years
Top of range [member] | Returnable packaging crates [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | 10 years
Top of range [member] | Returnable packaging bottles [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | 5 years
Top of range [member] | Information processing equipment [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | 10 years

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- Definition Property plant and equipment estimated useful life. + References No definition available. + Details
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Namespace Prefix: | bud_
Data Type: | xbrli:durationItemType
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_
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Period Type: | duration

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

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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_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_BuildingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=bud_ProductionPlantAndProductionEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=bud_ProductionPlantAndStoragePackagingAndHandlingEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=bud_ReturnablePackagingKegsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=bud_ReturnablePackagingCratesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=bud_ReturnablePackagingBottlesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_CommunicationAndNetworkEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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