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Share-Based Payments - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Share-based payment transactions expense $ 510,000,000 $ 169,000,000 $ 340,000,000
Percentage of discount on market price of share for share based payments 20.00%    
Share-based compensation number of shares issued | shares 1,972,000,000 1,959,000,000 1,957,000,000
Fair value of stock options granted $ 0 $ 7.54 $ 11.79
The Zenzele Kabili scheme [member]      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Share-based payment transactions expense $ 72,000,000    
AB inBev [member]      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Lock up Period for first half of bonus shares 3 years    
Lock up Period for second half of bonus shares 5 years    
Restricted Stock Units [member]      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Share based payment vesting period first half 3 years    
Share based payment vesting period other half 5 years    
Share-based compensation number of shares issued | shares 200,000 200,000  
Share-based compensation grant date fair value $ 9,000,000 $ 9,000,000  
Restricted Stock Units [member] | AB inBev [member]      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Exercise period of stock options 5 years    
Stock options granted 100,000 100,000  
Fair value of stock options granted $ 4,000,000 $ 4,000,000  
Long Term Incentive Warrant Plan [Member]      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Number of shares granted | shares 3