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Revenue Recognition (Tables) | 3 Months Ended
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Mar. 31, 2022
Revenue Recognition [Abstract] |
Disaggregation of Revenue by Product Type and Market | With respect to its seaborne mining 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.
| Three Months Ended March 31, 2022
| Seaborne Thermal Mining |  | Seaborne Metallurgical Mining |  | Powder River Basin Mining |  | Other U.S. Thermal Mining |  | Corporate and Other (1) |  | Consolidated
| (Dollars in millions)
Thermal coal |  |  |  |  |  |  |  |  |  |  |
Domestic | $ | 40.4 |  |  | $ | — |  |  | $ | 251.5 |  |  | $ | 199.9 |  |  | $ | — |  |  | $ | 491.8 |
Export | 210.5 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 210.5 |
Total thermal | 250.9 |  |  | — |  |  | 251.5 |  |  | 199.9 |  |  | — |  |  | 702.3 |
Metallurgical coal |  |  |  |  |  |  |  |  |  |  |
Export | — |  |  | 318.0 |  |  | — |  |  | — |  |  | — |  |  | 318.0 |
Total metallurgical | — |  |  | 318.0 |  |  | — |  |  | — |  |  | — |  |  | 318.0 |
Other (2) | 0.3 |  |  | 3.3 |  |  | (0.3) |  |  | 3.2 |  |  | (335.4) |  |  | (328.9) |
Revenue | $ | 251.2 |  |  | $ | 321.3 |  |  | $ | 251.2 |  |  | $ | 203.1 |  |  | $ | (335.4) |  |  | $ | 691.4 |
| Three Months Ended March 31, 2021
| Seaborne Thermal Mining |  | Seaborne Metallurgical Mining |  | Powder River Basin Mining |  | Other U.S. Thermal Mining |  | Corporate and Other (1) |  | Consolidated
| (Dollars in millions)
Thermal coal |  |  |  |  |  |  |  |  |  |  |
Domestic | $ | 44.1 |  |  | $ | — |  |  | $ | 228.4 |  |  | $ | 146.8 |  |  | $ | — |  |  | $ | 419.3 |
Export | 131.9 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 131.9 |
Total thermal | 176.0 |  |  | — |  |  | 228.4 |  |  | 146.8 |  |  | — |  |  | 551.2 |
Metallurgical coal |  |  |  |  |  |  |  |  |  |  |
Export | — |  |  | 86.6 |  |  | — |  |  | — |  |  | — |  |  | 86.6 |
Total metallurgical | — |  |  | 86.6 |  |  | — |  |  | — |  |  | — |  |  | 86.6 |
Other (2) | 0.4 |  |  | 0.9 |  |  | — |  |  | 2.5 |  |  | 9.7 |  |  | 13.5 |
Revenue | $ | 176.4 |  |  | $ | 87.5 |  |  | $ | 228.4 |  |  | $ | 149.3 |  |  | $ | 9.7 |  |  | $ | 651.3 |
(1) Corporate and Other revenue includes net losses related to unrealized mark-to-market adjustments on derivatives related to forecasted sales and other financial trading activity of $290.2 million and $4.9 million during the three months ended March 31, 2022 and 2021, respectively. Refer to Note 7. “Derivatives and Fair Value Measurements” for additional information. Also included in Corporate and Other revenue is revenue with customers of $19.0 million and $17.9 million during the three months ended March 31, 2022 and 2021, respectively. (2) Other 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 and property and facility rentals.
Schedule of Accounts Receivable | “Accounts receivable, net” at March 31, 2022 and December 31, 2021 consisted of the following:
| March 31, 2022 |  | December 31, 2021
| (Dollars in millions)
Trade receivables, net | $ | 323.4 |  |  | $ | 307.0 |
Miscellaneous receivables, net | 34.0 |  |  | 43.5 |
Accounts receivable, net | $ | 357.4 |  |  | $ | 350.5 |

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