v3.26.1
Equity - Non-controlling interests - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2026
Jul. 03, 2025
Jul. 01, 2025
Jun. 30, 2025
Sep. 30, 2024
Jun. 30, 2024
Disclosure of reserves within equity [line items]            
Proportion of ownership interest in subsidiary 100.00%          
Guinness Nigeria            
Disclosure of reserves within equity [line items]            
Disposal, percentage of interest disposed         58.02%  
Guinness Ghana Breweries PLC            
Disclosure of reserves within equity [line items]            
Disposal, percentage of interest disposed   80.40%        
Seychelles Breweries Limited            
Disclosure of reserves within equity [line items]            
Disposal, percentage of interest disposed     54.40%      
United Spirits Limited            
Disclosure of reserves within equity [line items]            
Proportion of ownership interests in subsidiary held by non-controlling interests 42.79%          
Proportion of ownership interest in subsidiary 55.88%          
Sichuan Shuijingfang Company Limited            
Disclosure of reserves within equity [line items]            
Proportion of ownership interests in subsidiary held by non-controlling interests 36.35%          
Ketel One            
Disclosure of reserves within equity [line items]            
Proportion of ownership interest in subsidiary 50.00%          
Ketel One distribution right            
Disclosure of reserves within equity [line items]            
Carrying value of distribution rights $ 1,800     $ 1,800   $ 1,800