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Inventories - Components of Inventories (Details) - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
Inventory Disclosure [Abstract]    
Raw materials $ 320.5 $ 326.2
Work in process 15.6 14.9
Finished goods 219.3 200.5
Supplies and materials 506.5 471.5
Inventories $ 1,061.9 $ 1,013.1