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PROPERTY, PLANT & EQUIPMENT | 12 Months Ended
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Dec. 31, 2024
Property, Plant and Equipment [Abstract] |
PROPERTY, PLANT & EQUIPMENT | PROPERTY, PLANT & EQUIPMENT Balances of major classes of assets and allowances for depreciation, depletion and amortization at December 31 are as follows:
in millions | 2024 | 2023
Land and land improvements 1 | $ | 5,804.8 |  | $ | 4,292.6 |
Buildings | 304.4 |  | 204.4 |
Machinery and equipment | 7,717.2 |  | 6,785.5 |
Finance leases (see Note 7) | 54.7 |  | 62.3 |
Deferred asset retirement costs | 235.6 |  | 171.3 |
Construction in progress | 400.1 |  | 319.4 |
Total, gross property, plant & equipment | $ | 14,516.8 |  | $ | 11,835.5 |
Allowances for depreciation, depletion and amortization | (6,055.3) |  | (5,617.8) |
Total, net property, plant & equipment | $ | 8,461.5 |  | $ | 6,217.7 |
1 Includes depletable land of $4,015.7 million and $2,684.4 million as of December 31, 2024 and 2023, respectively. Capitalized interest costs with respect to qualifying construction projects and total interest costs incurred before recognition of the capitalized amount for the years ended December 31 are as follows:
in millions | 2024 | 2023 | 2022
Capitalized interest cost | $ | 4.0 |  | $ | 3.7 |  | $ | 3.6 |
Total interest cost incurred before recognition of the capitalized amount | 195.2 |  | 199.8 |  | 172.8 |

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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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