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Financial Instruments - Financial Assets Recorded at FVTPL (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of financial assets [line items]    
Gains (losses) on financial assets at fair value through profit or loss $ 8.3 $ 7.3
Equity securities | FVTPL | Investments    
Disclosure of financial assets [line items]    
Unrealized losses on investments (6.5) (16.6)
Realized gains on investments 1.0 0.4
Gains (losses) on financial assets at fair value through profit or loss $ (5.5) $ (16.2)