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Assets Classified as Held for Sale, Liabilities Associated With Assets Held for Sale and Discontinued Operations - Schedule of Assets Held for Sale (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Disclosure of Assets and Liabilities of Disposal Groups Classified as Held for Sale [abstract] |  |
Balance at the end of previous year | $ 74 | $ 10,013
Reclassified to assets held for sale in the period | 11 | 210
Impairment losses | (20) |
Disposals | (33) | (9,665)
Effect of movements in foreign exchange | (2) | (484)
Balance at the end of year | $ 30 | $ 74

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- Definition Asset held for sale effect of movements in foreign exchange + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Assets held for sale impairment losses. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Disclosure of Assets and Liabilities of Disposal Groups Classified as Held for Sale Explanatory [abstract] + References No definition available. + Details
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- Definition Reclassification to assets held for sale. + References No definition available. + Details
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Namespace Prefix: | bud_
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Balance Type: | debit
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- Definition The amount of current assets other than non-current assets or disposal groups classified as held for sale or as held for distribution to owners. [Refer: Current assets; Disposal groups classified as held for sale [member]; Non-current assets or disposal groups classified as held for sale; Non-current assets or disposal groups classified as held for distribution to owners] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 66 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_66&doctype=Standard -URIDate 2021-03-24 + Details
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Balance Type: | debit
Period Type: | instant

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- Definition The increase (decrease) in equity resulting from the disposal of subsidiaries. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 106 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_106_d&doctype=Standard -URIDate 2021-03-24 + Details
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