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Use of Estimates and Judgments - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of changes in accounting estimates [line items] |  |
COVID-19 costs | $ (105) | $ (182)

X
- Definition Costs incurred on account of crisis on employees and other expenses. + References No definition available. + Details
Name: | bud_CostsIncurredOnAccountOfCrisisOnEmployeesAndOtherExpenses
Namespace Prefix: | bud_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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