v3.26.1
Equity - Schedule of movements in own shares (Details) - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Disclosure of classes of share capital [line items]      
Beginning balance $ (13,178) $ (12,070) $ (11,709)
Increase (decrease) due to share based payment transactions (79) (93) (86)
Ending balance $ (12,954) $ (13,178) $ (12,070)
Own shares      
Disclosure of classes of share capital [line items]      
Beginning balance (in shares) 210 212 216
Beginning balance $ 2,228 $ 2,250 $ 2,286
Increase (decrease) due to share based payment transactions $ (17) $ (22) $ (36)
Ending balance (in shares) 208 210 212
Ending balance $ 2,211 $ 2,228 $ 2,250
Own shares | Share trust arrangements      
Disclosure of classes of share capital [line items]      
Increase (decrease) due to share based payment transactions (in shares) (1) (1) (2)
Increase (decrease) due to share based payment transactions $ (12) $ (14) $ (19)
Own shares | Shares used to satisfy options      
Disclosure of classes of share capital [line items]      
Increase (decrease) due to share based payment transactions (in shares) (1) (1) (2)
Increase (decrease) due to share based payment transactions $ (5) $ (8) $ (17)
Own shares | Share buyback programme      
Disclosure of classes of share capital [line items]      
Number of shares purchased - share buyback programme (in shares)     28
Shares purchased – share buyback programme     $ 987
Shares cancelled (number)     (28)
Shares cancelled     $ (987)