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Pension and similar obligations - Summary of Changes in Unrecognized Assets (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of changes in unrecognized assets of defined benefit plans [abstract] |  |  |
Irrecoverable surplus impact at 1 January | $ (43) | $ (32) | $ (31)
Interest expense | (4) | (3) | (2)
Changes excluding amounts included in interest expense | 9 | (8) | 1
Irrecoverable surplus impact at 31 December | $ (38) | $ (43) | $ (32)

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- Definition Disclosure of changes in unrecognized assets of defined benefit plans. + References No definition available. + Details
Name: | bud_DisclosureOfChangesInUnrecognizedAssetsOfDefinedBenefitPlansAbstract
Namespace Prefix: | bud_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Irrecoverable surplus. + References No definition available. + Details
Name: | bud_IrrecoverableSurplus
Namespace Prefix: | bud_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Irrecoverable surplus change. + References No definition available. + Details
Name: | bud_IrrecoverableSurplusChange
Namespace Prefix: | bud_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Irrecoverable surplus interest expense. + References No definition available. + Details
Name: | bud_IrrecoverableSurplusInterestExpense
Namespace Prefix: | bud_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration