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Risks Arising From Financial Instruments - Additional Information (Detail)
 1 Months Ended 12 Months Ended
Sep. 30, 2013
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Disclosure of detailed information about financial instruments [line items]        
Derivative position positive pre-tax impact on equity reserves   $ 604,000,000 $ 850,000,000 $ 548,000,000
Amount of exposure equivalent to shares hedged   $ 18,258,000,000 21,598,000,000  
Description of methods to use sensitivity analysis is assessed   Sensitivity analysis is assessed based on the yearly volatility using daily observable market data during 250 days at 31 December 2021. Sensitivity analysis is assessed based on the yearly volatility using daily observable market data during 250 days at 31 December 2020.    
Financial Liabilities   $ 116,790,000,000 126,178,000,000  
Equity swaps [member]        
Disclosure of detailed information about financial instruments [line items]        
Financial Liabilities   5,412,000,000 5,353,000,000  
Top of range [member]        
Disclosure of detailed information about financial instruments [line items]        
Currency transactional risk impact on consolidated profit before taxes   54,000,000 30,000,000 $ 22,000,000
Floating interest rate [member] | Nigeria [member]        
Disclosure of detailed information about financial instruments [line items]        
Borrowed amount   268,000,000    
Ambev [member]        
Disclosure of detailed information about financial instruments [line items]        
Derivative and non-derivative financial instruments, net   589,000,000 671,000,000  
Holding Company [Member]        
Disclosure of detailed information about financial instruments [line items]        
Derivative and non-derivative financial instruments, net   11,921,000,000 9,691,000,000  
Observable Market Inputs - Level 3 [member]        
Disclosure of detailed information about financial instruments [line items]        
Financial Liabilities   $ 832,000,000 $ 1,251,000,000  
CERVECERIA NACIONAL DOMINICANA S.A. [member]        
Disclosure of detailed information about financial instruments [line items]        
Percentage of shares hold by ELJ   15.00%    
Call Options [member]        
Disclosure of detailed information about financial instruments [line items]        
Non derivative financial liability   $ 0    
Equity price risk [member]        
Disclosure of detailed information about financial instruments [line items]        
Amount of exposure equivalent to shares hedged   100,500,000    
Gain recognized in the profit or loss   $ (48,000,000)    
Reasonable possible volatility rate   26.51% 53.87% 25.20%
Positive/negative impact on profit before tax   $ 1,604,000,000 $ 3,787,000,000 $ 2,066,000,000
Equity price risk [member] | Share-Based Compensation Plan [member]        
Disclosure of detailed information about financial instruments [line items]        
Gain recognized in the profit or loss   (23,000,000)    
Interest Rate Risk [Member] | Floating interest rate [member]        
Disclosure of detailed information about financial instruments [line items]        
Carrying value of financial liabilities   $ 6,164,000,000    
Proportion of company's financial liabilities   6.90%    
Higher/lower interest expense   $ 8,000,000 3,000,000 16,000,000
Higher/lower interest income   44,000,000 58,000,000 $ 22,000,000
Interest Rate Risk [Member] | Before hedging [Member]        
Disclosure of detailed information about financial instruments [line items]        
Carrying value of financial liabilities   $ 53,000,000 5,000,000  
Credit risk [member]        
Disclosure of detailed information about financial instruments [line items]        
Concentration of credit risks, description   There was no significant concentration of credit risks with any single counterparty as of 31 December 2021 and no single customer represented more than 10% of the total revenue of the group in 2021.    
Credit risk [member] | Top of range [member]        
Disclosure of detailed information about financial instruments [line items]        
Percentage of revenue accounted by individual customer   10.00%    
Deferred consideration on acquisitions [member] | Put Option [Member] | Observable Market Inputs - Level 3 [member]        
Disclosure of detailed information about financial instruments [line items]        
Non derivative financial liability   $ 589,000,000 $ 671,000,000  
Fair value hedges [member] | Interest Rate Risk [Member] | US Dollar Fixed Rate Bond Hedges [Member]        
Disclosure of detailed information about financial instruments [line items]        
Issuance amount   1,000,000,000.0    
Cash flow hedges [member] | Interest Rate Risk [Member] | Pound Sterling Bond Hedges [Member]        
Disclosure of detailed information about financial instruments [line items]        
Issuance amount 500,000,000      
Interest rate percentage 4.00%      
Appointment period September 2013      
Maturity period September 2025      
Grupo Modelo [member] | Equity price risk [member]        
Disclosure of detailed information about financial instruments [line items]        
Gain recognized in the profit or loss   $ (13,000,000)    
SABMiller Group [member] | Equity price risk [member]        
Disclosure of detailed information about financial instruments [line items]        
Gain recognized in the profit or loss   $ (12,000,000)