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Properties, Plants and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2022
Property, Plant and Equipment [Abstract] |
Components of net properties, plants and equipment | The components of net properties, plants and equipment were as follows:
| December 31,
| 2022 |  | 2021
| (Dollars in millions)
Coke and energy plant, machinery and equipment | $ | 2,134.9 |  |  | $ | 2,077.3 |
Logistics plant, machinery and equipment | 176.6 |  |  | 170.7 |
Land and land improvements | 106.8 |  |  | 105.5 |
Construction-in-progress | 40.7 |  |  | 50.8 |
Other | 46.3 |  |  | 43.7 |
Gross investment, at cost | 2,505.3 |  |  | 2,448.0 |
Less: accumulated depreciation | (1,276.0) |  |  | (1,160.1) |
Total properties, plants and equipment, net | $ | 1,229.3 |  |  | $ | 1,287.9 |

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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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