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Inventories (Tables)
12 Months Ended
Dec. 31, 2022
Inventory Disclosure [Abstract]  
Schedule of inventory classes The classes of inventory as of December 31 are summarized as follows:
($ in millions)20222021
Finished goods$136.6 $104.7 
Work in process34.8 34.4 
Raw materials174.6 147.9 
Total$346.0 $287.0