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Share-Based Payments - Bud Apac Share-Based Compaensation Program (Detail)
shares in Millions, Unit_pure in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
Disclosure Of Share Based Compaensation Program [Line Items]      
Fair value of options granted $ 0 $ 7.54 $ 11.79
Long Term Incentive Stock Option Plan [member]      
Disclosure Of Share Based Compaensation Program [Line Items]      
Number of shares granted | shares 0.0 38.1  
Restricted Stock Units [member]      
Disclosure Of Share Based Compaensation Program [Line Items]      
Share-based compensation grant date fair value 3.9 10.9 5.5
Share-based compensation grant date fair value $ 9,000,000 $ 9,000,000  
Budweiser APAC [Member] | Long Term Incentive Stock Option Plan [member]      
Disclosure Of Share Based Compaensation Program [Line Items]      
Number of shares granted 0.0 69.7  
Fair value of options granted   $ 52,000,000  
Budweiser APAC [Member] | Restricted Stock Units [member]      
Disclosure Of Share Based Compaensation Program [Line Items]      
Share-based compensation grant date fair value | shares 0.0 29.7  
Share-based compensation grant date fair value   $ 84,000,000  
Budweiser APAC [Member] | Share-Based Compensation Plan [member]      
Disclosure Of Share Based Compaensation Program [Line Items]      
Share-based compensation grant date fair value 0.1 0.2  
Share-based compensation grant date fair value $ 1,000,000 $ 1,000,000  
Budweiser APAC [Member] | People bet plan [member]      
Disclosure Of Share Based Compaensation Program [Line Items]      
Share-based compensation grant date fair value | shares 0.0 0.6  
Share-based compensation grant date fair value   $ 2,000,000  
Budweiser APAC [Member] | New Restricted Stock Units Plan [member]      
Disclosure Of Share Based Compaensation Program [Line Items]      
Share-based compensation grant date fair value | shares 10.0 6.8  
Share-based compensation grant date fair value $ 26,000,000 $ 23,000,000