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Share-Based Payments - Summary of Number of Outstanding Deferred and Restricted stock Units (Detail) - Restricted Stock Units [member] shares in Millions, Unit_pure in Millions | 12 Months Ended
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Dec. 31, 2021 shares | Dec. 31, 2020 shares | Dec. 31, 2019
Disclosure of other equity instruments [line items] |  |  |
Restricted stock units outstanding at 1 January | 19.1 | 9.9 | 6.0
Restricted stock units issued during the year | 3.9 | 10.9 | 5.5
Restricted stock units vested during the year | (1.1) | (0.7) | (1.0)
Restricted stock units forfeited during the year | (1.1) | (0.9) | (0.7)
Restricted stock units outstanding at the end of December | 20.9 | 19.1 | 9.9
Ambev [member] |  |  |
Disclosure of other equity instruments [line items] |  |  |
Restricted stock units issued during the year | 20.6 | 21.1 |
Brazil [Member] | Ambev [member] |  |  |
Disclosure of other equity instruments [line items] |  |  |
Restricted stock units outstanding at 1 January | 49.6 | 31.7 | 25.0
Restricted stock units issued during the year | 20.7 | 21.3 | 12.0
Restricted stock units vested during the year | (5.0) | (1.9) | (4.2)
Restricted stock units forfeited during the year | (1.5) | (1.5) | (1.1)
Restricted stock units outstanding at the end of December | 63.8 | 49.6 | 31.7

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- Definition The number of other equity instruments (ie other than share options) exercised or vested in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45&doctype=Standard -URIDate 2021-03-24 + Details
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