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Contingencies - Summary of Ab Inbev's Material Tax Proceedings Related to Ambev and Its Subsidiaries (Detail) - Ambev [member] - Legal proceedings contingent liability [member] - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure of detailed information about material tax [line items]    
Income tax and social contribution $ 9,723 $ 10,372
Value-added and excise taxes 4,285 4,483
Other taxes 663 727
Material tax net $ 14,671 $ 15,582