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Share-Based Payments - Summary of Number of Options Outstanding (Detail) shares in Millions, Unit_pure in Millions | 12 Months Ended
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Dec. 31, 2021 shares | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of information about options outstanding [line items] |  |  |
Options outstanding at the end of December | 113.8 |  |
Brazil [Member] | Ambev [member] |  |  |
Disclosure of information about options outstanding [line items] |  |  |
Options outstanding at 1 January | 127.3 | 141.8 | 141.3
Options issued during the year |  |  | 24.6
Options exercised during the year | (5.2) | (5.7) | (7.8)
Options forfeited during the year | (8.3) | (8.8) | (16.3)
Options outstanding at the end of December | 113.8 | 127.3 | 141.8
AB inBev [member] |  |  |
Disclosure of information about options outstanding [line items] |  |  |
Options outstanding at 1 January | 113.3 | 88.7 | 92.6
Options issued during the year |  | 38.1 | 13.8
Options exercised during the year | (1.3) | (3.9) | (10.7)
Options forfeited during the year | (9.2) | (9.0) | (7.0)
Options outstanding at the end of December | 102.7 | 113.3 | 88.7

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- Definition The number of share options outstanding in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_d&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_b_i&doctype=Standard -URIDate 2021-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -Subparagraph b -Clause vi -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_b_vi&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The number of share options exercised in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -Subparagraph b -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_b_iv&doctype=Standard -URIDate 2021-03-24 + Details
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