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Property, Plant, and Equipment | 3 Months Ended
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Mar. 31, 2025
Property, Plant and Equipment [Abstract] |
Property, Plant, and Equipment | 8. Property, Plant, and Equipment The components of property, plant, and equipment were as follows (dollars in millions):
|  | March 31, |  |  | December 31, |
|  | 2025 |  |  | 2024 |
Land and land improvements |  | $ | 215.8 |  |  | $ | 203.4 |
Buildings |  |  | 1,222.1 |  |  |  | 1,140.0 |
Machinery and equipment |  |  | 7,515.4 |  |  |  | 7,368.8 |
Construction in progress |  |  | 287.5 |  |  |  | 397.2 |
Other |  |  | 201.4 |  |  |  | 195.8 |
Property, plant and equipment, at cost |  |  | 9,442.2 |  |  |  | 9,305.2 |
Less accumulated depreciation |  |  | (5,362.7 | ) |  |  | (5,266.2 | )
Property, plant, and equipment, net |  | $ | 4,079.5 |  |  | $ | 4,039.0 |
Depreciation expense for the three months ended March 31, 2025 and 2024 wa s $128.1 million a nd $118.1 million, respectively. During the three months ended March 31, 2025, we recognized $3.1 million of incremental depreciation expense as a result of closure costs related to corrugated products facilities. We recognized $1.5 million of incremental depreciation expense during the three months ended March 31, 2024 as a result of Jackson mill conversion-related activities. At March 31, 2025 and December 31, 2024, purchases of property, plant, and equipment included in accounts payable were $57.6 million and $33.8 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/1943274/2147477798/958-360-50-6 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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