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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 | 6 Months Ended
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Jun. 30, 2026 | Jun. 30, 2025
Disclosure of information about weighted average number of ordinary and restricted shares outstanding [line items] |  |
Issued ordinary and restricted shares as of 1 January, net of treasury shares | 1,951 | 1,975
Effect of stock lending | 20 | 27
Effect of delivery of treasury shares and share buyback programs | 5 | (13)
Weighted average number of ordinary and restricted shares as of 30 June | 1,976 | 1,989
Effect of share options, PSUs and restricted stock units | 33 | 37
Profit attributable to equity holders of AB InBev | $ 6,314 | $ 3,824
Net impact of exceptional items on profit (refer to Note 7) | (2,034) | (305)
Profit, attributable to equity holders of AB InBev, before exceptional items | 4,280 | 3,519
Hyperinflation impacts | 35 | 37
Underlying profit | $ 4,314 | $ 3,556
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 as of 30 June | 1,976 | 1,989
Weighted average number of ordinary and restricted shares (diluted) as of 30 June | 2,009 | 2,026

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