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Other Non-Current Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Subclassifications of assets, liabilities and equities [abstract]    
Investment Tax Credits (Canada) (i) $ 29.1 $ 28.2
Milestone payments 5.7 19.1
Other 11.3 12.1
Other non-current assets $ 46.1 $ 59.4