v3.26.1
Intangibles and other assets (Schedule of detailed information about intangible assets) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of reconciliation of changes in intangible assets [line items]    
Balance, beginning of year $ 5.5  
Balance, end of year 7.1 $ 5.5
Cost [Member]    
Disclosure of reconciliation of changes in intangible assets [line items]    
Balance, beginning of year 22.5 21.2
Additions 2.1 2.5
Effects of movement in exchange rates 0.7 (1.2)
Balance, end of year 25.3 22.5
Accumulated amortization [Member]    
Disclosure of reconciliation of changes in intangible assets [line items]    
Balance, beginning of year (17.0) (17.2)
Depreciation for the year (0.7) (0.8)
Effects of movement in exchange rates (0.5) 1.0
Balance, end of year $ (18.2) $ (17.0)