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Other Events | 12 Months Ended
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Dec. 31, 2022
Other Events [Abstract] |
Other Events | Other Events Divestitures and Other Transactions During July 2021, the Company executed transactions to sell its closed Millennium and Wilkie Creek Mines, which reduced its closed mine reclamation liabilities and associated costs. The Millennium Mine was sold for minimal cash consideration and the assumption of the majority of the mine’s reclamation liabilities. At December 31, 2022, the Company remains responsible for $5.7 million of reclamation liabilities. The Company recorded a gain of $26.1 million in connection with the sale, which is included within “Net gain on disposals” in the accompanying consolidated statements of operations for the year ended December 31, 2021. The Wilkie Creek Mine was sold for minimal cash consideration and full assumption of the mine’s reclamation liabilities. The Company recorded a gain of $24.6 million in connection with the sale, which is included within “Income (loss) from discontinued operations, net of income taxes” in the accompanying consolidated statements of operations for the year ended December 31, 2021. United Wambo Joint Venture with Glencore In December 2019 the Company formed an unincorporated joint venture with Glencore plc (Glencore), in which the Company holds a 50% interest, to combine the existing operations of the Company’s Wambo Open-Cut Mine in Australia with the adjacent coal reserves of Glencore’s United Mine. The Company proportionally consolidates the entity based upon its economic interest. Both parties contributed mining tenements upon formation of the joint venture (United Wambo Joint Venture), and combined operations commenced in December 2020. At that date, the parties contributed mining equipment and other assets, and certain additional construction and development activities are ongoing. During the years ended December 31, 2022, 2021 and 2020, the Company contributed approximately $17 million, $59 million and $72 million, respectively, towards construction and development, which is reflected as “Additions to property, plant, equipment and mine development” in the accompanying consolidated statements of cash flows. Glencore is responsible for managing the mining operations of the joint venture.

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