v3.25.2
Inventories - Schedule of Inventory (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Inventory Disclosure [Abstract]    
Manufacturing supplies $ 59.0 $ 57.5
Raw materials 22.2 13.6
Work in process 115.0 114.5
Finished products 28.4 35.3
Gross inventory 224.6 220.9
Allowance for inventory reserves (1.2) (1.1)
Total inventories, net $ 223.4 $ 219.8