XML 157 R144.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Employee Benefits - Summary of Changes in Unrecognized Assets (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of changes in unrecognized assets of defined benefit plans [abstract] |  |  |
Irrecoverable surplus impact at 1 January | $ (31) | $ (74) | $ (77)
Interest expense | (2) | (4) | (7)
Changes excluding amounts included in interest expense | 1 | 47 | 9
Irrecoverable surplus impact at 31 December | $ (32) | $ (31) | $ (74)

X
- 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

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

X
- 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

X
- 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