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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
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
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 1,975 1,984 1,984
Effect of stock lending 27 29 30
Effect of delivery of treasury shares and share buyback programs (18) (9) 2
Weighted average number of ordinary and restricted shares as of 31 December 1,984 2,003 2,016
Effect of share options, PSUs and restricted stock units 34 41 38
Profit attributable to equity holders of AB InBev $ 6,837 $ 5,855 $ 5,341
Net impact of exceptional items on profit (refer to Note 8) 499 1,062 614
Profit before exceptional items, attributable to equity holders of AB InBev 7,336 6,917 5,955
Hyperinflation impacts 74 145 203
Underlying profit $ 7,410 $ 7,061 $ 6,158
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 31 December 1,984 2,003 2,016
Weighted average number of ordinary and restricted shares (diluted) as of 31 December 2,018 2,044 2,054