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Additional Information on Operating Expenses by Nature - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Cost of sales [member] |  |  |
Disclosure Of Depreciation Amortization And Impairment [line items] |  |  |
Full cost reallocation from the aggregate depreciation, amortization and impairment expense to cost of good sold | $ (11) | $ (5) | $ 5

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- Definition Disclosure Of Depreciation Amortization And Impairment [line items] + References No definition available. + Details
Name: | bud_DisclosureOfDepreciationAmortizationAndImpairmentLineItems
Namespace Prefix: | bud_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Full cost from depreciation amortization and impairment expense to cost of goods sold. + References No definition available. + Details
Name: | bud_FullCostFromDepreciationAmortizationAndImpairmentExpenseToCostOfGoodsSold
Namespace Prefix: | bud_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | bud_ExpenseCategoriesAxis=bud_CostOfSalesGoodsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |