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Inventories, net (Details) - USD ($)
$ in Millions
Mar. 31, 2023
Dec. 31, 2022
Inventory, Net    
Raw materials $ 111.8 $ 106.7
Production materials, stores, and supplies 28.9 27.9
Finished and in-process goods 270.8 228.2
Subtotal 411.5 362.8
Less: LIFO reserve (50.1) (27.8)
Inventories, net $ 361.4 $ 335.0