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Employee Benefits - Summary of Fair Value of Plan Assets (Detail) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
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 | 34.00% | 33.00%
Corporate Bonds [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 34.00% | 34.00%
Equity instruments [member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 24.00% | 25.00%
Property [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 4.00% | 3.00%
Insurance Contracts and Others [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 4.00% | 5.00%
Quoted [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 94.00% | 95.00%
Quoted [Member] | Government Bonds [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 34.00% | 33.00%
Quoted [Member] | Corporate Bonds [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 34.00% | 34.00%
Quoted [Member] | Equity instruments [member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 24.00% | 25.00%
Quoted [Member] | Insurance Contracts and Others [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 2.00% | 3.00%
Unquoted [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 6.00% | 5.00%
Unquoted [Member] | Property [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 4.00% | 3.00%
Unquoted [Member] | Insurance Contracts and Others [Member] |  |
Disclosure of fair value of plan assets [line items] |  |
Fair value of plan assets | 2.00% | 2.00%

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- Definition Defined benefit plan assets target allocation percentage. + References No definition available. + Details
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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
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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
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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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Namespace Prefix: |
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Balance 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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Namespace Prefix: |
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Balance Type: |
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