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Inventories, net
 12 Months Ended
Dec. 31, 2021
Inventory Disclosure [Abstract]  
Inventories, net Inventories, net
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 
As of December 31, 2021, approximately 38 percent, 11 percent, and 51 percent of our Inventories, net, were accounted for under the FIFO, average cost, and LIFO methods, respectively. As of December 31, 2020, approximately 31 percent, 13 percent, and 56 percent of our Inventories, net, were accounted for under the FIFO, average cost, and LIFO methods, respectively.