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Summary of Significant Accounting Policies - Additional Information (Detail)	Jun. 30, 2026	Jun. 30, 2025
ARS [Member]
Disclosure Of Exchange Rates [line items]
Closing foreign exchange rate	1,482.53	1,193.35

X

- Definition

Disclosure of exchange rates [LineItems].

+ References

No definition available.

+ Details

Name:	bud_DisclosureOfExchangeRatesLineItems
Namespace Prefix:	bud_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_112_c&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_ClosingForeignExchangeRate
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	srt_CurrencyAxis=bud_ArsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: