v3.25.4
Financial instruments - Movements in level 3 instruments measured on a recurring basis (Details) - Level 3 - USD ($)
$ in Millions
 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of fair value measurement of liabilities [line items]    
At the beginning of the period $ (226)  
At the end of the period (229) $ (419)
Zacapa financial liability    
Disclosure of fair value measurement of liabilities [line items]    
At the beginning of the period (101) (198)
Net (losses)/gains included in the income statement (1) 6
Net (losses)/gains included in exchange in other comprehensive income 0 0
Net (losses)/gains included in retained earnings (9) 11
Settlement of liabilities 0 1
At the end of the period (111) (180)
Contingent consideration recognised on acquisition of businesses    
Disclosure of fair value measurement of liabilities [line items]    
At the beginning of the period (125) (245)
Net (losses)/gains included in the income statement (2) (2)
Net (losses)/gains included in exchange in other comprehensive income (1) 3
Net (losses)/gains included in retained earnings 0 0
Settlement of liabilities 10 5
At the end of the period $ (118) $ (239)