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Working capital - Analysis of provisions for obsolescence of inventories (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Classes of inventory [Line Items]      
Balance at beginning of the year $ 128 $ 113 $ 133
Exchange differences (3) (27) (8)
Income statement charge 51 66 8
Utilised (47) (23) (18)
Sale of businesses (5) (1) (2)
Ending balance $ 124 $ 128 $ 113