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Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2021
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)20212020
Land and land improvements$103.8 $103.1 
Buildings and building equipment528.4 513.7 
Machinery and equipment551.4 501.1 
Construction in progress145.9 73.6 
Total cost$1,329.5 $1,191.5 
Accumulated depreciation(512.5)(419.8)
Property, plant and equipment, net$817.0 $771.7 
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Depreciation expense was $70.8 million, $71.5 million, and $69.7 million in 2021, 2020 and 2019, respectively.