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Changes in Equity and Earnings Per Share - Summary of Weighted Average Number of Ordinary and Restricted Shares (Detail) - USD ($) shares in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of information about weighted average number of ordinary and restricted shares outstanding [line items] |  |  |
Issued ordinary and restricted shares at 1 January, net of treasury shares | 1,972 | 1,959 | 1,957
Effect of stock lending | 30 | 30 | 25
Effect of delivery of treasury shares | 4 | 9 | 2
Weighted average number of ordinary and restricted shares at 31 December | 2,007 | 1,998 | 1,984
Effect of share options, warrants and restricted stock units | 38 | 39 | 42
Weighted average number of ordinary and restricted shares (diluted) at 31 December | 2,045 | 2,037 | 2,026
Profit attributable to equity holders of AB InBev | $ 4,670 | $ 1,405 | $ 9,171
Exceptional items, before taxes (refer to Note 8) | 614 | 3,103 | 323
Exceptional finance income/(cost), before taxes (refer to Note 11) | 806 | 1,738 | (882)
Exceptional taxes (refer to Note 8) | (346) | (155) | 6
Exceptional non-controlling interest (refer to Note 8) | (20) | (228) | (108)
Profit from discontinued operations (refer to Note 21) | 0 | (2,055) | (424)
Profit from continuing operations before exceptional items and discontinued operations, attributable to equity holders of AB InBev | 5,723 | 3,807 | 8,086
Mark-to-market (losses)/gains on certain derivatives related to the hedging of share-based payment programs (refer to Note 11) | 23 | 1,211 | (898)
Hyperinflation impacts | 28 | 4 | 7
Profit before exceptional items, discontinued operations, mark-to-market gains/losses and hyperinflation impacts, attributable to equity holders of AB InBev | $ 5,774 | $ 5,022 | $ 7,196
Ordinary restricted shares [member] |  |  |
Disclosure of information about weighted average number of ordinary and restricted shares outstanding [line items] |  |  |
Weighted average number of ordinary and restricted shares at 31 December | 2,007 | 1,998 | 1,984

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