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Fair Value - Change in Fair Value for the Equity Investment (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Equity Method Investments      
Beginning balance $ 795.7    
Change in fair value 234.6 $ 165.4 $ 0.0
Ending balance 772.3 795.7  
Indicor      
Equity Method Investments      
Beginning balance 675.9 535.0  
Change in fair value 96.4 140.9  
Ending balance $ 772.3 $ 675.9 $ 535.0