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Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2023
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | Property, Plant and Equipment Property, plant and equipment consisted of the following:
| December 31,
(in Millions) | 2023 |  | 2022
Land and land improvements | $ | 98.1 |  |  | $ | 103.6 |
Buildings and building equipment | 540.0 |  |  | 522.9 |
Machinery and equipment | 717.2 |  |  | 613.1 |
Construction in progress | 204.5 |  |  | 175.9 |
Total cost | $ | 1,559.8 |  |  | $ | 1,415.5 |
Accumulated depreciation | (667.3) |  |  | (565.9) |
Property, plant and equipment, net | $ | 892.5 |  |  | $ | 849.6 |
____________________ Depreciation expense was $73.5 million, $71.1 million, and $70.8 million in 2023, 2022 and 2021, respectively.

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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://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-7 + Details
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