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Related Parties - Summary of AB InBev's Transactions with Associates (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of associates [line items]      
Gross profit $ 31,207 $ 27,247 $ 31,967
Current assets 23,949 26,519  
Current liabilities 34,184 32,352  
Associates [member]      
Disclosure of associates [line items]      
Gross profit 58 (118) (78)
Current assets 57 55 38
Current liabilities $ 99 $ 115 $ 119