v3.26.1
Property, plant and equipment (Details) - USD ($)
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Disclosure of detailed information about property, plant and equipment [line items]      
Impairment loss recognised in profit or loss, property, plant and equipment $ 0 $ 0  
Property, plant and equipment, pledged as security 381,600,000   $ 356,400,000
Cost | Facility equipment      
Disclosure of detailed information about property, plant and equipment [line items]      
Additions 37,800,000    
Depreciation      
Disclosure of detailed information about property, plant and equipment [line items]      
Depreciation $ 11,900,000 $ 9,600,000