Changes in Equity and Earnings Per Share - Summary of EPS (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |
6 Months Ended | |
|---|---|---|
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 |