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Property, Plant and Equipment, Net
 12 Months Ended
Dec. 31, 2022
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT, NET PROPERTY, PLANT AND EQUIPMENT, NET
The property, plant and equipment at December 31, 2022 and December 31, 2021 were as follows:
December 31,
(in millions)20222021
Leasehold improvements$67.9 $38.0 
Equipment124.7 112.4 
Property, plant and equipment, gross192.6 150.4 
Less accumulated depreciation(109.2)(106.9)
Property, plant and equipment, net$83.4 $43.5 
During the year ended December 31, 2022, the Company ceased the use of certain leased Salt Lake City facilities and one of its South San Francisco facilities. As a result, the Company recognized a $3.9 million impairment on the property, plant and equipment associated with the leases, which consisted primarily of leasehold improvements. See Note 13 for further discussion.
During the year ended December 31, 2021, the Company completed the sales of Myriad RBM, Inc. and the Myriad Autoimmune business, which resulted in the disposition of $3.1 million of property, plant and equipment. See Note 17 for additional information regarding these divestitures.
The Company recorded depreciation during the respective periods as follows:
Years Ended December 31,Six-month Transition Period Ended December 31,Year Ended June 30,
(in millions)2022202120202020
Depreciation expense$11.6 $12.1 $5.0 $11.0