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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, at December 31, consist of the following:
| 2023 |  | 2022
Land and improvements | $ | 105.1 |  |  | $ | 39.8 |
Mineral Reserves | 57.6 |  |  | — |
Buildings and improvements | 328.8 |  |  | 305.7 |
Machinery and equipment | 1,580.7 |  |  | 1,495.3 |
Construction in progress | 160.3 |  |  | 59.0 |
| 2,232.5 |  |  | 1,899.8 |
Less accumulated depreciation, amortization and depletion | (1,228.3) |  |  | (1,155.4) |
Property, plant and equipment - net | $ | 1,004.2 |  |  | $ | 744.4 |
For the years ended December 31, 2023, 2022 and 2021, we recorded depreciation, amortization and depletion expense of $74.7 million, $73.4 million, and $82.6 million, 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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