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Segment Reporting - Additional Information (Detail)
$ in Millions
 6 Months Ended
Jun. 30, 2020
USD ($)
Segments
Region
Jun. 30, 2019
USD ($)
Disclosure of operating segments [line items]    
Number of business segment | Segments 6  
Number of reportable segments | Segments 6  
Number of geographical regions | Region 5  
Net revenue $ 21,298 $ 25,823 [1]
United States [member]    
Disclosure of operating segments [line items]    
Net revenue 6,675 6,833
Brazil [Member]    
Disclosure of operating segments [line items]    
Net revenue 2,641 3,516
Beer business [member]    
Disclosure of operating segments [line items]    
Net revenue 19,510 23,673
Non-beer business [member]    
Disclosure of operating segments [line items]    
Net revenue $ 1,807 $ 2,150
[1] The unaudited condensed consolidated interim income statement for the six-month period ended 30 June 2019 has been restated to reflect the classification of the Australian operations as discontinued operations.