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Other Operating Income/(Expenses) - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of other operating income expense [abstract]
Research and development		$ 298	$ 296	$ 291
Income from brazilian tax credits	$ 226	226	481
Income from interest on brazilian tax credits		$ 118	$ 315	$ 118

X

- Definition

Disclosure of other operating income expense.

+ References

No definition available.

+ Details

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Namespace Prefix:	bud_
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Balance Type:	na
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X

- Definition

Income from brazilian tax credits.

+ References

No definition available.

+ Details

Name:	bud_IncomeFromBrazilianTaxCredits
Namespace Prefix:	bud_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Income from interest on brazilian tax credits.

+ References

No definition available.

+ Details

Name:	bud_IncomeFromInterestOnBrazilianTaxCredits
Namespace Prefix:	bud_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of expenditure directly attributable to research or development activities, recognised in profit or loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 38
-IssueDate 2021-01-01
-Paragraph 126
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2021-en-r&anchor=para_126&doctype=Standard
-URIDate 2021-03-24

+ Details

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Balance Type:	debit
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