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Pension and similar obligations - Summary of Fair Value of Plan Assets (Detail) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 100.00% | 100.00%
Government Bonds [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 38.00% | 34.00%
Corporate Bonds [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 28.00% | 30.00%
Equity instruments [member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 22.00% | 24.00%
Property [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 6.00% | 7.00%
Insurance Contracts and Others [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 6.00% | 5.00%
Quoted [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 90.00% | 91.00%
Quoted [Member] | Government Bonds [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 38.00% | 34.00%
Quoted [Member] | Corporate Bonds [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 27.00% | 30.00%
Quoted [Member] | Equity instruments [member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 22.00% | 24.00%
Quoted [Member] | Insurance Contracts and Others [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 3.00% | 4.00%
Unquoted [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 10.00% | 8.00%
Unquoted [Member] | Corporate Bonds [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 1.00% |
Unquoted [Member] | Property [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 6.00% | 7.00%
Unquoted [Member] | Insurance Contracts and Others [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 3.00% | 1.00%

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- Definition Defined benefit plan assets target allocation percentage. + References No definition available. + Details
Name: | bud_DefinedBenefitPlanAssetsTargetAllocationPercentage
Namespace Prefix: | bud_
Data Type: | dtr-types:percentItemType
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
Name: | ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_ClassesOfAssetsAxis=bud_GovernmentBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfAssetsAxis=bud_CorporateBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfAssetsAxis=bud_EquityInstrumentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfAssetsAxis=bud_PropertyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfAssetsAxis=bud_InsuranceContractsAndOthersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=bud_QuotedPlanAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=bud_UnquotedPlanAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |