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Inventories
9 Months Ended
Sep. 30, 2025
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories are valued at the lower of cost (on a first-in, first-out basis) or net realizable value. Inventory balances were as follows:
($ in millions)September 30,
2025
December 31,
2024
Raw materials$183.0 $166.9 
Work in process97.6 65.2 
Finished goods157.4 144.9 
 $438.0 $377.0