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Share-Based Payments - Summary of Number of Outstanding Deferred and Restricted stock Units (Detail) - Restricted Stock Units [member]
shares in Millions, Unit_pure in Millions
 12 Months Ended
Dec. 31, 2021
shares
Dec. 31, 2020
shares
Dec. 31, 2019
Disclosure of other equity instruments [line items]      
Restricted stock units outstanding at 1 January 19.1 9.9 6.0
Restricted stock units issued during the year 3.9 10.9 5.5
Restricted stock units vested during the year (1.1) (0.7) (1.0)
Restricted stock units forfeited during the year (1.1) (0.9) (0.7)
Restricted stock units outstanding at the end of December 20.9 19.1 9.9
Ambev [member]      
Disclosure of other equity instruments [line items]      
Restricted stock units issued during the year 20.6 21.1  
Brazil [Member] | Ambev [member]      
Disclosure of other equity instruments [line items]      
Restricted stock units outstanding at 1 January 49.6 31.7 25.0
Restricted stock units issued during the year 20.7 21.3 12.0
Restricted stock units vested during the year (5.0) (1.9) (4.2)
Restricted stock units forfeited during the year (1.5) (1.5) (1.1)
Restricted stock units outstanding at the end of December 63.8 49.6 31.7