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Changes in Equity and Earnings Per Share - Summary of EPS (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 6 Months Ended
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Jun. 30, 2026 | Jun. 30, 2025
Earnings per share [abstract] |  |
Profit attributable to equity holders of AB InBev | $ 6,314 | $ 3,824
Weighted average number of ordinary and restricted shares | 1,976 | 1,989
Basic EPS | $ 3.2 | $ 1.92
Profit attributable to equity holders of AB InBev | $ 6,314 | $ 3,824
Weighted average number of ordinary and restricted shares (diluted) | 2,009 | 2,026
Diluted EPS | $ 3.14 | $ 1.89
Underlying profit | $ 4,314 | $ 3,556
Weighted average number of ordinary and restricted shares | 1,976 | 1,989
Underlying EPS | $ 2.18 | $ 1.79

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