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Summary of significant accounting policies (Details 3)
12 Months Ended
Jun. 30, 2025
Machinery And Equipment [member]  
Statement [Line Items]  
Remaining useful life Between 3 and 30 years
Other [Member]  
Statement [Line Items]  
Remaining useful life Between 3 and 10 years
Buildings And Facilities [Member]  
Statement [Line Items]  
Remaining useful life Between 5 and 50 years