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Property, Plant and Equipment, Net | 12 Months Ended
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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) | 2022 |  | 2021
Leasehold improvements | $ | 67.9 |  |  | $ | 38.0 |
Equipment | 124.7 |  |  | 112.4 |
Property, plant and equipment, gross | 192.6 |  |  | 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) | 2022 |  | 2021 |  | 2020 |  | 2020
Depreciation expense | $ | 11.6 |  |  | $ | 12.1 |  |  | $ | 5.0 |  |  | $ | 11.0 |

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI https://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126982197&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99779-112916 + Details
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