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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