v3.26.1
Financial instruments (Schedule of detailed information about foreign currency risk) (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of detailed information about financial instruments [line items]      
Cash $ 568.9 $ 541.8 $ 249.8
Other financial assets 131.7 27.4  
Other financial liabilities (277.9) (152.7)  
Currency risk [Member] | Amounts held in CAD [Member]      
Disclosure of detailed information about financial instruments [line items]      
Cash 8.8 6.4  
Trade and other receivables 0.1 0.1  
Restricted cash 0.0 0.2  
Other financial assets 98.7 12.1  
Trade and other payables (8.6) (5.7)  
Other financial liabilities 0.0 0.0  
Net financial asset (liability) 99.0 13.1  
Currency risk [Member] | Amounts held in USD [Member]      
Disclosure of detailed information about financial instruments [line items]      
Cash 36.6 13.9  
Trade and other receivables 145.7 116.4  
Restricted cash 0.0 0.0  
Other financial assets 0.0 0.0  
Trade and other payables (2.2) (1.9)  
Other financial liabilities (7.9) (7.3)  
Net financial asset (liability) 172.2 121.1  
Currency risk [Member] | Amounts held in PEN [Member]      
Disclosure of detailed information about financial instruments [line items]      
Cash 10.7 3.8  
Trade and other receivables 1.0 0.4  
Restricted cash 0.0 0.0  
Other financial assets 0.0 0.0  
Trade and other payables (25.0) (15.9)  
Other financial liabilities (105.9) (68.4)  
Net financial asset (liability) $ (119.2) $ (80.1)