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Property, Plant And Equipment
 3 Months Ended
Apr. 02, 2021
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):
April 2, 2021December 31, 2020
Land and improvements$24.3 $24.8 
Buildings and improvements177.7 182.6 
Machinery, equipment and other assets435.8 438.8 
Construction in progress84.0 84.8 
Gross property, plant and equipment721.8 731.0 
Less: accumulated depreciation(426.1)(428.0)
Property, plant and equipment, net$295.7 $303.0