XML 33 R15.htm IDEA: XBRL DOCUMENT v3.24.0.1
Property, Plant And Equipment
 12 Months Ended
Dec. 31, 2023
Property, Plant and Equipment [Abstract]  
Property, Plant And Equipment PROPERTY, PLANT AND EQUIPMENT
The classes of property, plant and equipment as of December 31 are summarized as follows ($ in millions):
20232022
Land and improvements$10.0 $10.0 
Buildings and improvements157.4 154.5 
Machinery, equipment and other assets417.9 370.2 
Construction in progress65.3 71.2 
Gross property, plant and equipment650.6 605.9 
Less: accumulated depreciation(341.0)(312.3)
Property, plant and equipment, net$309.6 $293.6