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Property, Plant And Equipment
6 Months Ended
Jun. 30, 2023
Property, Plant and Equipment [Abstract]  
Property, Plant And Equipment PROPERTY, PLANT AND EQUIPMENT
The classes of property, plant and equipment are summarized as follows ($ in millions):
June 30, 2023December 31, 2022
Land and improvements$10.0 $10.0 
Buildings and improvements158.3 154.5 
Machinery, equipment and other assets394.7 370.2 
Construction in progress63.8 71.2 
Gross property, plant and equipment626.8 605.9 
Less: accumulated depreciation(326.7)(312.3)
Property, plant and equipment, net$300.1 $293.6