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Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Property, plant and equipment consisted of the following:
December 31,
(in Millions)20202019
Land and land improvements$103.1 $94.3 
Buildings and building equipment513.7 490.1 
Machinery and equipment501.1 459.5 
Construction in progress73.6 65.3 
Total cost$1,191.5 $1,109.2 
Accumulated depreciation(419.8)(351.2)
Property, plant and equipment, net$771.7 $758.0 
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Depreciation expense was $71.5 million, $69.7 million, and $73.9 million in 2020, 2019 and 2018, respectively.