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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 | NOTE 9. PROPERTY, PLANT AND EQUIPMENT
|  |  | December 31,
| Useful Lives |  | 2023 |  | 2022
Property Plant and Equipment |  |  | ($ in millions)
Land and improvements to land | 10-20 Years(1) |  | $ | 283.1 |  |  | $ | 283.5 |
Buildings and building equipment | 10-30 Years |  | 442.7 |  |  | 412.0 |
Machinery and equipment | 3-20 Years |  | 6,410.5 |  |  | 6,181.1 |
Leasehold improvements | 3-11 Years |  | 8.5 |  |  | 8.5 |
Construction in progress |  |  | 201.2 |  |  | 202.1 |
Property, plant and equipment |  |  | 7,346.0 |  |  | 7,087.2 |
Accumulated depreciation |  |  | (4,826.4) |  |  | (4,413.1) |
Property, plant and equipment, net |  |  | $ | 2,519.6 |  |  | $ | 2,674.1 |
(1) Useful life is exclusive to land improvements. The weighted-average useful life of machinery and equipment at December 31, 2023, was 11 years. Depreciation expense was $421.8 million, $469.9 million and $443.3 million for 2023, 2022 and 2021, respectively. Interest capitalized was $2.8 million, $3.1 million and $3.2 million for 2023, 2022 and 2021, respectively. The consolidated statements of cash flows for the years ended December 31, 2023, 2022 and 2021, included an increase (decrease) of $5.3 million, $(4.2) million and $6.4 million, respectively, to capital expenditures, with the corresponding change to accounts payable and accrued liabilities, related to purchases of property, plant and equipment included in accounts payable and accrued liabilities at December 31, 2023, 2022 and 2021.

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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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