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Revenue Recognition | 12 Months Ended
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Dec. 31, 2020
Revenue Recognition [Abstract] |
Revenue Recognition | Revenue Recognition Disaggregation of Revenues Revenue by product type and market is set forth in the following tables. 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.
| Year Ended December 31, 2020
| 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 | $ | 145.5 |  |  | $ | — |  |  | $ | 993.9 |  |  | $ | 675.2 |  |  | $ | — |  |  | $ | 1,814.6 |
Export | 564.8 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 564.8 |
Total thermal | 710.3 |  |  | — |  |  | 993.9 |  |  | 675.2 |  |  | — |  |  | 2,379.4 |
Metallurgical coal |  |  |  |  |  |  |  |  |  |  |
Export | — |  |  | 484.3 |  |  | — |  |  | — |  |  | — |  |  | 484.3 |
Total metallurgical | — |  |  | 484.3 |  |  | — |  |  | — |  |  | — |  |  | 484.3 |
Other | 1.5 |  |  | 2.2 |  |  | (2.8) |  |  | 32.1 |  |  | (15.6) |  |  | 17.4 |
Revenues | $ | 711.8 |  |  | $ | 486.5 |  |  | $ | 991.1 |  |  | $ | 707.3 |  |  | $ | (15.6) |  |  | $ | 2,881.1 |
| Year Ended December 31, 2019
| 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 | $ | 147.9 |  |  | $ | — |  |  | $ | 1,208.9 |  |  | $ | 1,274.2 |  |  | $ | — |  |  | $ | 2,631.0 |
Export | 822.4 |  |  | — |  |  | — |  |  | 11.3 |  |  | — |  |  | 833.7 |
Total thermal | 970.3 |  |  | — |  |  | 1,208.9 |  |  | 1,285.5 |  |  | — |  |  | 3,464.7 |
Metallurgical coal |  |  |  |  |  |  |  |  |  |  |
Export | — |  |  | 1,030.0 |  |  | — |  |  | — |  |  | — |  |  | 1,030.0 |
Total metallurgical | — |  |  | 1,030.0 |  |  | — |  |  | — |  |  | — |  |  | 1,030.0 |
Other | 1.4 |  |  | 3.1 |  |  | 19.8 |  |  | 23.9 |  |  | 80.5 |  |  | 128.7 |
Revenues | $ | 971.7 |  |  | $ | 1,033.1 |  |  | $ | 1,228.7 |  |  | $ | 1,309.4 |  |  | $ | 80.5 |  |  | $ | 4,623.4 |
| Year Ended December 31, 2018
| 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 | $ | 153.0 |  |  | $ | — |  |  | $ | 1,424.8 |  |  | $ | 1,342.5 |  |  | $ | — |  |  | $ | 2,920.3 |
Export | 945.0 |  |  | — |  |  | — |  |  | 23.4 |  |  | — |  |  | 968.4 |
Total thermal | 1,098.0 |  |  | — |  |  | 1,424.8 |  |  | 1,365.9 |  |  | — |  |  | 3,888.7 |
Metallurgical coal |  |  |  |  |  |  |  |  |  |  |
Export | — |  |  | 1,548.6 |  |  | — |  |  | — |  |  | — |  |  | 1,548.6 |
Total metallurgical | — |  |  | 1,548.6 |  |  | — |  |  | — |  |  | — |  |  | 1,548.6 |
Other | 1.2 |  |  | 4.4 |  |  | — |  |  | 27.1 |  |  | 111.8 |  |  | 144.5 |
Revenues | $ | 1,099.2 |  |  | $ | 1,553.0 |  |  | $ | 1,424.8 |  |  | $ | 1,393.0 |  |  | $ | 111.8 |  |  | $ | 5,581.8 |
Revenue by initial contract duration was as follows:
| Year Ended December 31, 2020
| Seaborne Thermal Mining |  | Seaborne Metallurgical Mining |  | Powder River Basin Mining |  | Other U.S. Thermal Mining |  | Corporate and Other (1) |  | Consolidated
| (Dollars in millions)
One year or longer | $ | 349.2 |  |  | $ | 371.0 |  |  | $ | 945.0 |  |  | $ | 671.4 |  |  | $ | — |  |  | $ | 2,336.6 |
Less than one year | 361.1 |  |  | 113.3 |  |  | 48.9 |  |  | 3.8 |  |  | — |  |  | 527.1 |
Other (2) | 1.5 |  |  | 2.2 |  |  | (2.8) |  |  | 32.1 |  |  | (15.6) |  |  | 17.4 |
Revenues | $ | 711.8 |  |  | $ | 486.5 |  |  | $ | 991.1 |  |  | $ | 707.3 |  |  | $ | (15.6) |  |  | $ | 2,881.1 |
| Year Ended December 31, 2019
| Seaborne Thermal Mining |  | Seaborne Metallurgical Mining |  | Powder River Basin Mining |  | Other U.S. Thermal Mining |  | Corporate and Other (1) |  | Consolidated
| (Dollars in millions)
One year or longer | $ | 589.2 |  |  | $ | 828.6 |  |  | $ | 1,087.6 |  |  | $ | 1,254.2 |  |  | $ | — |  |  | $ | 3,759.6 |
Less than one year | 381.1 |  |  | 201.4 |  |  | 121.3 |  |  | 31.3 |  |  | — |  |  | 735.1 |
Other (2) | 1.4 |  |  | 3.1 |  |  | 19.8 |  |  | 23.9 |  |  | 80.5 |  |  | 128.7 |
Revenues | $ | 971.7 |  |  | $ | 1,033.1 |  |  | $ | 1,228.7 |  |  | $ | 1,309.4 |  |  | $ | 80.5 |  |  | $ | 4,623.4 |
| Year Ended December 31, 2018
| Seaborne Thermal Mining |  | Seaborne Metallurgical Mining |  | Powder River Basin Mining |  | Other U.S. Thermal Mining |  | Corporate and Other (1) |  | Consolidated
| (Dollars in millions)
One year or longer | $ | 799.5 |  |  | $ | 1,036.7 |  |  | $ | 1,283.9 |  |  | $ | 1,307.2 |  |  | $ | — |  |  | $ | 4,427.3 |
Less than one year | 298.5 |  |  | 511.9 |  |  | 140.9 |  |  | 58.7 |  |  | — |  |  | 1,010.0 |
Other (2) | 1.2 |  |  | 4.4 |  |  | — |  |  | 27.1 |  |  | 111.8 |  |  | 144.5 |
Revenues | $ | 1,099.2 |  |  | $ | 1,553.0 |  |  | $ | 1,424.8 |  |  | $ | 1,393.0 |  |  | $ | 111.8 |  |  | $ | 5,581.8 |
(1) Corporate and Other revenue includes gains and losses related to mark-to-market adjustments from economic hedge activities intended to hedge future coal sales. Refer to Note 7. “Derivatives and Fair Value Measurements” for additional information regarding the economic hedge activities. (2) Other includes revenues 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, for which contract duration is not meaningful. Committed Revenue from Contracts with Customers The Company expects to recognize revenue subsequent to December 31, 2020 of approximately $3.5 billion related to contracts with customers in which volumes and prices per ton were fixed or reasonably estimable at December 31, 2020. Approximately 46% of such amount is expected to be recognized over the next twelve months and the remainder thereafter. Actual revenue related to such contracts may differ materially for various reasons, including price adjustment features for coal quality and cost escalations, volume optionality provisions and potential force majeure events. This estimate of future revenue does not include any revenue related to contracts with variable prices per ton that cannot be reasonably estimated, such as the majority of seaborne metallurgical and seaborne thermal coal contracts where pricing is negotiated or settled quarterly or annually. Accounts Receivable “Accounts receivable, net” at December 31, 2020 and 2019 consisted of the following:
| December 31,
| 2020 |  | 2019
| (Dollars in millions)
Trade receivables, net | $ | 180.9 |  |  | $ | 283.1 |
Miscellaneous receivables, net | 63.9 |  |  | 46.4 |
Accounts receivable, net | $ | 244.8 |  |  | $ | 329.5 |
Trade receivables, net included no allowance for credit losses as of both December 31, 2020 and 2019. Miscellaneous receivables, net included no allowance for credit losses as of both December 31, 2020 and 2019. No charges for credit losses were recognized during the year ended December 31, 2020. Included in “Operating costs and expenses” in the consolidated statements of operations were reductions of previously recorded credit losses of $4.4 million and $0.2 million for the years ended December 31, 2019 and 2018, respectively.

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI http://asc.fasb.org/topic&trid=49130388 + Details
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