v3.26.1
Financial instruments and risk management - Schedule of movements in level 3 instruments measured on a recurring basis (Details) - Level 3 - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Disclosure of fair value measurement of liabilities [line items]    
At the beginning of the year $ (226) $ (443)
Net gains included in the income statement 81 140
Net gains/(losses) included in exchange in other comprehensive income 2 (8)
Net (losses)/gains included in retained earnings (10) 89
Acquisitions 0 (12)
Settlement of liabilities 13 8
At the end of the year $ (140) $ (226)