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Properties, Plants, and Equipment | 12 Months Ended
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Dec. 31, 2022
Property, Plant and Equipment [Abstract] |
Properties, Plants, and Equipment | 6. 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 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI https://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126982197&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99779-112916 + Details
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