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Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2022
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment PROPERTY, PLANT AND EQUIPMENT
A summary of changes in property, plant and equipment follows (in millions):
December 31,
2021		Additions / (Depreciation)December 31,
2022
Land$1.2 $— $1.2 
Buildings and leasehold improvements4.6 0.2 4.8 
Machinery and equipment1.4 0.6 2.0 
Other1.1 — 1.1 
Property, plant and equipment, gross8.3 0.8 9.1 
Accumulated depreciation(3.0)(0.6)(3.6)
Property, plant and equipment, net$5.3 $0.2 $5.5 

Depreciation expense was $0.6 million in 2022, $0.6 million in 2021 and $0.5 million in 2020.