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Inventories (Tables)
9 Months Ended
Sep. 30, 2022
Inventory Disclosure [Abstract]  
Schedule of Inventory
The classes of inventory are summarized as follows ($ in millions):
September 30, 2022December 31, 2021
Finished goods$234.9 $214.3 
Work in process26.7 22.0 
Raw materials87.3 88.3 
Reserve for inventory obsolescence(57.6)(60.8)
Total$291.3 $263.8