v3.26.1
Financial instruments and risk management - Capital management - Narrative (Details)
$ / shares in Units, $ in Millions
12 Months Ended
Aug. 05, 2026
$ / shares
Jun. 30, 2026
USD ($)
$ / shares
Jun. 30, 2025
USD ($)
$ / shares
Jun. 30, 2024
$ / shares
Jun. 30, 2023
$ / shares
Disclosure of detailed information about financial instruments [line items]          
Adjusted net borrowings to adjusted EBITDA ratio   3.1 3.4    
Adjusted net borrowings | $   $ 20,869 $ 22,263    
Post-employment benefit liabilities before tax | $   387 409    
Adjusted EBITDA | $   $ 6,650 $ 6,645    
Final dividend per share | $ / shares     $ 0.6298 $ 0.6298 $ 0.5998
Major ordinary share transactions          
Disclosure of detailed information about financial instruments [line items]          
Proposed final dividend per share (in US dollar per share) | $ / shares $ 0.30        
Recommended full year dividend | $ / shares   $ 0.50      
Minimum          
Disclosure of detailed information about financial instruments [line items]          
Adjusted net borrowings to adjusted EBITDA ratio   2.5      
Dividend policy payout range   0.30      
Maximum          
Disclosure of detailed information about financial instruments [line items]          
Adjusted net borrowings to adjusted EBITDA ratio   3.0      
Dividend policy payout range   0.50