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Property, Plant, and Equipment | 12 Months Ended
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Dec. 31, 2024
Property, Plant and Equipment [Abstract] |
Property, Plant, and Equipment | Property, Plant, and Equipment The following table summarizes the components of property, plant, and equipment as of December 31, 2024 and 2023.
| December 31, 2024 |  | December 31, 2023
| (in millions)
Land | $ | 158.3 |  |  | $ | 140.2 |
Mineral reserves | 1,111.7 |  |  | 546.9 |
Buildings and improvements | 366.4 |  |  | 345.6 |
Machinery and other | 1,292.8 |  |  | 1,121.0 |
Construction in progress | 129.7 |  |  | 115.5 |
| 3,058.9 |  |  | 2,269.2 |
Less accumulated depreciation and depletion | (929.5) |  |  | (932.9) |
| $ | 2,129.4 |  |  | $ | 1,336.3 |
The increase in mineral reserves is primarily due to the acquisition of Stavola in our Construction Products segment. We did not capitalize any interest expense as part of the construction of facilities and equipment during 2024 or 2023. As of December 31, 2024 and 2023, the Company had non-operating facilities with a net book value of $12.7 million and $14.6 million, respectively, classified as property, plant, and equipment, net on our Consolidated Balance Sheets. We estimate the fair market value of properties not currently in use based on the location and condition of the properties, the fair market value of similar properties in the area, and the Company's experience selling similar properties in the past. Our estimated fair value of these assets exceeds their book value.

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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/1943274/2147477798/958-360-50-6 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/1943274/2147477798/958-360-50-1 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/1943274/2147477798/958-360-50-7 + Details
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