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Financial instruments and risk management - Fair value measurement - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Business combinations      
Disclosure of detailed information about financial instruments [line items]      
Contingent consideration payment period 6 years    
Level 3      
Disclosure of detailed information about financial instruments [line items]      
Other financial liabilities $ 443 $ 665  
Movement in financial assets - other 84 24  
Zacapa put option | Level 3      
Disclosure of detailed information about financial instruments [line items]      
Other financial liabilities 198 274 $ 261
Contingent consideration recognised on acquisition of businesses      
Disclosure of detailed information about financial instruments [line items]      
Other financial liabilities 153 279  
Contingent consideration recognised on acquisition of businesses | Volume, measurement input      
Disclosure of detailed information about financial instruments [line items]      
Increase (decrease) in fair value liability due to increase in observable input $ 25    
Sensitivity analysis, percentage of possible increase in unobservable input, liabilities 10.00%    
Sensitivity analysis, percentage of possible decrease in unobservable input, liabilities 20.00%    
Increase (decrease) in fair value liability due to decrease in observable input $ 70    
Contingent consideration recognised on acquisition of businesses | Cash flows, measurement input      
Disclosure of detailed information about financial instruments [line items]      
Increase (decrease) in fair value liability due to increase in observable input $ 30    
Sensitivity analysis, percentage of possible increase in unobservable input, liabilities 10.00%    
Sensitivity analysis, percentage of possible decrease in unobservable input, liabilities 10.00%    
Increase (decrease) in fair value liability due to decrease in observable input $ 30    
Contingent consideration recognised on acquisition of businesses | Business combinations | Undiscounted amount      
Disclosure of detailed information about financial instruments [line items]      
Other financial liabilities 273    
Contingent consideration recognised on acquisition of businesses | Level 3      
Disclosure of detailed information about financial instruments [line items]      
Other financial liabilities 245 391 $ 449
Contingent consideration recognised on acquisition of businesses | Level 3 | Don Papa rum      
Disclosure of detailed information about financial instruments [line items]      
Other financial liabilities $ 92 112  
Industrias Licoreras de Guatemala      
Disclosure of detailed information about financial instruments [line items]      
Proportion of ownership interest in investment by external party 50.00%    
Industrias Licoreras de Guatemala | Zacapa put option | Level 3      
Disclosure of detailed information about financial instruments [line items]      
Other financial liabilities $ 198 $ 274