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Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2020
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | Property, Plant and Equipment Components of Property, plant and equipment, net were as follows (in millions):
| As of December 31,
| 2020 |  | 2019
Land | $ | 24.0 |  |  | $ | 23.7 |
Buildings and improvements | 266.1 |  |  | 242.9 |
Machinery and equipment | 928.0 |  |  | 883.4 |
Finance leases | 57.1 |  |  | 47.2 |
Construction in progress and equipment not yet in service | 69.7 |  |  | 72.5 |
Total | 1,344.9 |  |  | 1,269.7 |
Less accumulated depreciation | (880.6) |  |  | (824.3) |
Property, plant and equipment, net | $ | 464.3 |  |  | $ | 445.4 |
No impairment charges were recorded in 2020 or 2019. In 2018, we impaired $4 million of property, plant and equipment at our Marshalltown facility that was damaged by a tornado. Refer to Note 5 for more information on the damage to our Marshalltown facility.

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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 http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://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 http://asc.fasb.org/extlink&oid=120429125&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 http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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