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Inventories, net (Tables)
12 Months Ended
Dec. 31, 2021
Inventory Disclosure [Abstract]  
Schedule of Inventory
December 31,
In millions20212020
Raw materials$48.8 $39.1 
Production materials, stores and supplies26.8 24.6 
Finished and in-process goods183.4 139.6 
Subtotal$259.0 $203.3 
Less: LIFO reserve(17.8)(14.3)
Inventories, net$241.2 $189.0