Segment information - Reporting segments (Details)	12 Months Ended
Jun. 30, 2025 item category segment
Disclosure of operating segments
Number of distinct businesses \| item	2
Number of reportable segments	6
Chemicals Business
Disclosure of operating segments
Number of reportable segments	3
Number of product categories \| category	2

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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