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Financial Instruments and Risk Management (Credit Risk) (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about financial instruments [line items]      
Cash and cash equivalents $ 327.2 $ 224.8 $ 129.8
Derivative assets 0.0 6.6  
Other receivables 4.2 5.5  
Total financial instrument exposure to credit risk 331.4 242.6  
Cash and cash equivalents      
Disclosure of detailed information about financial instruments [line items]      
Cash and cash equivalents 327.2 224.8  
Trade receivables      
Disclosure of detailed information about financial instruments [line items]      
Other receivables $ 4.2 $ 11.2