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Property, plant and equipment - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment $ 8,509 $ 7,738 $ 7,076
Government grants 185 185  
Freeholds land and buildings      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 1,970 1,870  
Long leasehold land and buildings      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 3 3  
Short leasehold land and buildings      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 546 491  
Fixtures and fittings      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 72 68 56
Returnable bottles and crates      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 234 232 $ 220
Land      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment $ 182 $ 177  
Minimum | Buildings      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful life (in years) 10 years    
Minimum | Casks and containers      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful life (in years) 15 years    
Minimum | Other plant and equipment      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful life (in years) 5 years    
Minimum | Fixtures and fittings      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful life (in years) 5 years    
Minimum | Returnable bottles and crates      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful life (in years) 5 years    
Maximum | Buildings      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful life (in years) 50 years    
Maximum | Casks and containers      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful life (in years) 50 years    
Maximum | Other plant and equipment      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful life (in years) 40 years    
Maximum | Fixtures and fittings      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful life (in years) 10 years    
Maximum | Returnable bottles and crates      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful life (in years) 10 years