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Inventories | 12 Months Ended
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Dec. 31, 2022
Inventory Disclosure [Abstract] |
Inventories | 5. Inventories The Company’s inventory consists of metallurgical coal, which is the principal raw material for the Company’s cokemaking operations, coke, which is the finished good sold by the Company to its customers, and materials, supplies and other. These components of inventories, net of lower of cost or net realizable value adjustments of $2.6 million, were as follows:
| December 31,
| 2022 |  | 2021
| (Dollars in millions)
Coal | $ | 109.4 |  |  | $ | 63.5 |
Coke | 14.3 |  |  | 16.6 |
Materials, supplies and other | 51.5 |  |  | 46.9 |
Total inventories | $ | 175.2 |  |  | $ | 127.0 |

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI https://asc.fasb.org/topic&trid=2126998 + Details
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