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Debt and Credit Arrangements - Interest Expense (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Line of Credit Facility      
Financing costs amortization $ 19.1 $ 17.2 $ 2.9
Total interest expense 328.5 289.1 31.7
Revolving Credit Facility      
Line of Credit Facility      
Capitalized interest (6.3) (4.6) (0.9)
Total interest expense 335.7 320.5 33.7
Revolving Credit Facility | Term loans due March 2030      
Line of Credit Facility      
Interest expense, debt 133.0 119.5 0.0
Revolving Credit Facility | Senior secured notes due 2030      
Line of Credit Facility      
Interest expense, debt 108.9 109.7 3.0
Revolving Credit Facility | Senior unsecured notes due 2031      
Line of Credit Facility      
Interest expense, debt 48.2 48.6 1.3
Revolving Credit Facility | Senior Secured Revolving Credit Facilities due 2029      
Line of Credit Facility      
Interest expense, debt 30.3 27.7 23.4
Revolving Credit Facility | Convertible notes due November 2024      
Line of Credit Facility      
Interest expense, debt $ 2.5 $ 2.4 $ 4.0