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Inventories (Tables)
6 Months Ended
Jun. 30, 2022
Inventory Disclosure [Abstract]  
Schedule of 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)June 30,
2022
December 31,
2021
Raw materials$177.3 $153.8 
Work in process69.0 63.5 
Finished goods165.3 161.1 
 $411.6 $378.4