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Property, Plant and Equipment - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [line items]      
Contractual commitments for acquisition of property, plant and equipment $ 449 $ 528  
AB InBev's net capital expenditures in the statement of cash flow $ 5,498 3,687  
Lease agreement term 27 years    
Additions to right of use assets $ 674 381  
Income from subleasing right-of-use assets 112 107 $ 152
Not later than one year [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Undiscounted operating lease payments to be received 116    
Later than two years and not later than five years [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Undiscounted operating lease payments to be received 295    
Later than five years [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Undiscounted operating lease payments to be received $ 104    
Bottom of range [member] | Dutch and Belgian pub real estate [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Sublease average outstanding period (in years) 6 years    
Top of range [member] | Dutch and Belgian pub real estate [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Sublease average outstanding period (in years) 8 years    
Production facilities [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Percentage of improve the production facilities 44.00%    
Logistics and commercial investments [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Percentage of improve the production facilities 41.00%    
Administrative capabilities and purchase of hardware and software [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Percentage of improving administrative capabilities and for the purchase of hardware and software 15.00%    
Property, plant and equipment subject to operating leases [member] | Bottom of range [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Operating lease initial period (in years) 5 years    
Property, plant and equipment subject to operating leases [member] | Top of range [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Operating lease initial period (in years) ten years    
Gross carrying amount [member] | Restrictions [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment, restrictions on title $ 1 $ 2