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Revenue Recognition (Tables) | 12 Months Ended
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Dec. 31, 2023
Revenue Recognition [Abstract] |
Disaggregation of Revenues | Revenue by product type and market is set forth in the following tables. With respect to its seaborne reporting segments, the Company classifies as “Export” certain revenue from domestically-delivered coal under contracts in which the price is derived on a basis similar to export contracts.
| Year Ended December 31, 2023
| Seaborne Thermal |  | Seaborne Metallurgical |  | Powder River Basin |  | Other U.S. Thermal |  | Corporate and Other (1) |  | Consolidated
| (Dollars in millions)
Thermal coal |  |  |  |  |  |  |  |  |  |  |
Domestic | $ | 136.4 |  |  | $ | — |  |  | $ | 1,193.9 |  |  | $ | 867.7 |  |  | $ | — |  |  | $ | 2,198.0 |
Export | 1,192.5 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,192.5 |
Total thermal | 1,328.9 |  |  | — |  |  | 1,193.9 |  |  | 867.7 |  |  | — |  |  | 3,390.5 |
Metallurgical coal |  |  |  |  |  |  |  |  |  |  |
Export | — |  |  | 1,299.6 |  |  | — |  |  | — |  |  | — |  |  | 1,299.6 |
Total metallurgical | — |  |  | 1,299.6 |  |  | — |  |  | — |  |  | — |  |  | 1,299.6 |
Other (2) | 0.8 |  |  | 2.3 |  |  | 4.2 |  |  | 20.5 |  |  | 228.8 |  |  | 256.6 |
Revenue | $ | 1,329.7 |  |  | $ | 1,301.9 |  |  | $ | 1,198.1 |  |  | $ | 888.2 |  |  | $ | 228.8 |  |  | $ | 4,946.7 |
| Year Ended December 31, 2022
| Seaborne Thermal |  | Seaborne Metallurgical |  | Powder River Basin |  | Other U.S. Thermal |  | Corporate and Other (1) |  | Consolidated
| (Dollars in millions)
Thermal coal |  |  |  |  |  |  |  |  |  |  |
Domestic | $ | 167.6 |  |  | $ | — |  |  | $ | 1,066.0 |  |  | $ | 943.9 |  |  | $ | — |  |  | $ | 2,177.5 |
Export | 1,177.3 |  |  | — |  |  | — |  |  | 3.5 |  |  | — |  |  | 1,180.8 |
Total thermal | 1,344.9 |  |  | — |  |  | 1,066.0 |  |  | 947.4 |  |  | — |  |  | 3,358.3 |
Metallurgical coal |  |  |  |  |  |  |  |  |  |  |
Export | — |  |  | 1,610.8 |  |  | — |  |  | — |  |  | — |  |  | 1,610.8 |
Total metallurgical | — |  |  | 1,610.8 |  |  | — |  |  | — |  |  | — |  |  | 1,610.8 |
Other (2) | 0.7 |  |  | 6.1 |  |  | (0.5) |  |  | 4.8 |  |  | 1.7 |  |  | 12.8 |
Revenue | $ | 1,345.6 |  |  | $ | 1,616.9 |  |  | $ | 1,065.5 |  |  | $ | 952.2 |  |  | $ | 1.7 |  |  | $ | 4,981.9 |
| Year Ended December 31, 2021
| Seaborne Thermal |  | Seaborne Metallurgical |  | Powder River Basin |  | Other U.S. Thermal |  | Corporate and Other (1) |  | Consolidated
| (Dollars in millions)
Thermal coal |  |  |  |  |  |  |  |  |  |  |
Domestic | $ | 173.5 |  |  | $ | — |  |  | $ | 970.7 |  |  | $ | 669.9 |  |  | $ | — |  |  | $ | 1,814.1 |
Export | 759.0 |  |  | — |  |  | — |  |  | 10.0 |  |  | — |  |  | 769.0 |
Total thermal | 932.5 |  |  | — |  |  | 970.7 |  |  | 679.9 |  |  | — |  |  | 2,583.1 |
Metallurgical coal |  |  |  |  |  |  |  |  |  |  |
Export | — |  |  | 719.8 |  |  | — |  |  | — |  |  | — |  |  | 719.8 |
Total metallurgical | — |  |  | 719.8 |  |  | — |  |  | — |  |  | — |  |  | 719.8 |
Other (2) | 1.5 |  |  | 7.9 |  |  | 0.5 |  |  | 9.2 |  |  | (3.7) |  |  | 15.4 |
Revenue | $ | 934.0 |  |  | $ | 727.7 |  |  | $ | 971.2 |  |  | $ | 689.1 |  |  | $ | (3.7) |  |  | $ | 3,318.3 |
Disaggregation of Revenue by Contract | (1) Corporate and Other includes the following:
| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
| (Dollars in millions)
Unrealized gains (losses) on derivative contracts related to forecasted sales | $ | 159.0 |  |  | $ | (35.8) |  |  | $ | (115.1) |
Realized losses on derivative contracts related to forecasted sales | (80.9) |  |  | (455.1) |  |  | (45.6) |
Revenue from physical sale of coal (3) | 109.4 |  |  | 470.7 |  |  | 140.3 |
Trading revenue | — |  |  | 10.7 |  |  | 6.1 |
Other (2) | 41.3 |  |  | 11.2 |  |  | 10.6 |
Total Corporate and Other | $ | 228.8 |  |  | $ | 1.7 |  |  | $ | (3.7) |
(2) Includes revenue from arrangements such as customer contract-related payments associated with volume shortfalls; royalties related to coal lease agreements; sales agency commissions; farm income; property and facility rentals; and revenue related to the Company’s assignment of rights to its excess port and rail capacity. (3) Includes revenue recognized upon the physical sale of coal purchased from the Company’s operating segments and sold to customers through the Company’s coal trading business as part of settling certain derivative contracts. Primarily represents the difference between the price contracted with the customer and the price allocated to the operating segment.
Schedule of Accounts Receivable | “Accounts receivable, net” at December 31, 2023 and 2022 consisted of the following:
| December 31,
| 2023 |  | 2022
| (Dollars in millions)
Trade receivables, net | $ | 322.3 |  |  | $ | 416.3 |
Miscellaneous receivables, net | 67.4 |  |  | 49.2 |
Accounts receivable, net | $ | 389.7 |  |  | $ | 465.5 |

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