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PROPERTY, PLANT AND EQUIPMENT
 12 Months Ended
Dec. 31, 2023
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT
NOTE 5. 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$54.4 $54.3 
Buildings and leasehold improvements317.2 312.3 
Machinery, equipment and other877.2 809.8 
Gross property, plant and equipment1,248.8 1,176.4 
Less: accumulated depreciation(809.0)(754.5)
Property, plant and equipment, net$439.8 $421.9