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Inventories, net (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Inventory, Net    
Raw materials $ 106.7 $ 48.8
Production materials, stores and supplies 27.9 26.8
Finished and in-process goods 228.2 183.4
Subtotal 362.8 259.0
Less: LIFO reserve (27.8) (17.8)
Inventories, net $ 335.0 $ 241.2
Percentage of FIFO inventory 47.00% 38.00%
Percentage of weighted average cost inventory 8.00% 11.00%
Percentage of LIFO inventory 45.00% 51.00%