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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2022
Accounting Policies [Abstract] |
Property, Plant and Equipment | The following table provides details on the useful lives and proportion of our machinery and equipment (“M&E”) in each useful life category.
Percent of M&E Cost |  | Depreciable Life in Years |  | Types of Assets
23 |  | 5 to 10 |  | Production control system equipment and hardware, laboratory testing equipment
11 |  | 15 |  | Control systems, instrumentation, metering equipment
49 |  | 20 |  | Production vessels and kilns, storage tanks, piping
7 |  | 25 to 30 |  | Blending equipment, storage tanks, piping, shipping equipment and platforms, safety equipment
3 |  | 40 |  | Machinery & equipment support structures and foundations
7 |  | Various |  | Various
Property, plant, and equipment, net consist of the following:
| December 31,
In millions | 2022 |  | 2021
Machinery and equipment | $ | 1,162.7 |  |  | $ | 1,113.3 |
Buildings and leasehold improvements | 200.9 |  |  | 177.2 |
Land and land improvements | 24.9 |  |  | 20.4 |
Construction in progress | 120.9 |  |  | 64.4 |
Total cost | $ | 1,509.4 |  |  | $ | 1,375.3 |
Less: accumulated depreciation | (710.8) |  |  | (655.6) |
Property, plant, and equipment, net (1) | $ | 798.6 |  |  | $ | 719.7 |
_______________ (1) This includes finance leases related to machinery and equipment of $94.3 million and $94.5 million, and net carrying value of $25.2 million and $27.7 million; buildings and leasehold improvements of $39.6 million and $29.0 million, and net carrying value of $34.9 million and $26.2 million; and construction in progress of zero and zero at December 31, 2022 and 2021, respectively. Amortization expense associated with these finance leases is included within depreciation expense. The payments remaining under these finance lease obligations are included within Note 13.
Lease Maturity Terms | Our operating leases principally relate to the following leased asset classes:
Leased Asset Class |  | Remaining Lease Term
Administrative offices |  | 1 to 15 years
Manufacturing buildings |  | 4 to 28 years
Manufacturing and office equipment |  | 1 to 11 years
Warehousing and storage facilities |  | 3 to 10 years
Vehicles |  | 3 to 6 years
Rail cars |  | 0 to 8 years

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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