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Property, Plant and Equipment, Net
 9 Months Ended
Sep. 30, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, Net PROPERTY, PLANT AND EQUIPMENT, NET
(in millions)September 30,
2021		December 31,
2020
Leasehold improvements$38.1 $35.7 
Equipment110.3 117.9 
Property, plant and equipment, gross148.4 153.6 
Less accumulated depreciation(105.0)(112.9)
Property, plant and equipment, net$43.4 $40.7 
The change in equipment from December 31, 2020 to September 30, 2021 was primarily due to the sales of Myriad RBM, Inc. and select assets of the Myriad Autoimmune business. See Note 16 for additional information on these divestitures.
Three months ended
September 30,		Nine months ended
September 30,
(in millions)2021202020212020
Depreciation expense$2.6 $2.4 $8.9 $7.5