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v3.25.4

Segment and Geographic Information - Segment Results (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Segment Reporting Information [Line Items] |  |  |
Revenue from physical sale of coal | $ 3,861.5 | $ 4,236.7 | $ 4,946.7
Segment Reporting Information Adjusted EBITDA excluding corporate and other segment | 525.8 | 961.9 | 1,376.1
Segment, Expenditure, Addition to Long-Lived Assets | 411.4 | 401.3 | 348.3
Loss (income) from equity affiliates | 14.4 | (11.5) | (6.9)
Shoal Creek insurance recovery | 0.0 | 109.5 | 0.0
Seaborne Thermal |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue from physical sale of coal | 908.5 | 1,213.9 | 1,329.7
Labor costs | 140.3 | 157.2 | 148.8
Repair costs | 113.0 | 152.8 | 154.4
Outside services | 111.5 | 128.7 | 122.7
Commodities expense | 80.6 | 88.6 | 97.0
Sales related costs | 196.3 | 224.3 | 207.4
Other expenses | 44.6 | 32.3 | 22.6
Adjusted EBITDA | 222.2 | 430.0 | 576.8
Segment, Expenditure, Addition to Long-Lived Assets | 39.8 | 73.2 | 62.0
Seaborne Metallurgical |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue from physical sale of coal | 1,036.6 | 1,055.6 | 1,301.9
Labor costs | 246.1 | 212.7 | 187.2
Repair costs | 195.6 | 190.8 | 151.3
Outside services | 355.0 | 258.9 | 205.1
Commodities expense | 58.7 | 59.6 | 61.5
Sales related costs | 238.2 | 231.6 | 259.0
Other expenses | (113.4) | (140.5) | (0.3)
Adjusted EBITDA | 56.4 | 242.5 | 438.1
Segment, Expenditure, Addition to Long-Lived Assets | 309.4 | 266.6 | 186.4
Shoal Creek insurance recovery | 80.8 |  |
Powder River Basin |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue from physical sale of coal | 1,153.0 | 1,098.8 | 1,198.1
Labor costs | 212.7 | 206.8 | 201.1
Repair costs | 145.4 | 131.7 | 154.9
Outside services | 130.3 | 123.2 | 138.0
Commodities expense | 160.8 | 158.5 | 180.2
Sales related costs | 281.1 | 297.5 | 341.9
Other expenses | 46.9 | 42.5 | 28.3
Adjusted EBITDA | 175.8 | 138.6 | 153.7
Segment, Expenditure, Addition to Long-Lived Assets | 33.1 | 35.0 | 40.9
Other U.S. Thermal |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue from physical sale of coal | 707.3 | 822.6 | 888.2
Labor costs | 205.3 | 218.6 | 218.8
Repair costs | 150.0 | 141.0 | 153.4
Outside services | 147.7 | 146.8 | 176.2
Commodities expense | 76.3 | 77.0 | 102.7
Sales related costs | 43.1 | 53.0 | 58.7
Other expenses | 13.5 | 35.4 | (29.1)
Adjusted EBITDA | 71.4 | 150.8 | 207.5
Segment, Expenditure, Addition to Long-Lived Assets | 24.0 | 18.6 | 47.6
Corporate and Other (1) |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue from physical sale of coal | 56.1 | 45.8 | 228.8
Segment, Expenditure, Addition to Long-Lived Assets | 5.1 | 7.9 | 11.4
Total Segment Excluding Corporate Segment and Other Operating Segment [Domain] |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment Reporting Information Adjusted EBITDA excluding corporate and other segment | 525.8 | 961.9 | 1,376.1
Additions to property, plant, equipment and mine development excluding corporate and other segment | 406.3 | 393.4 | 336.9
Total segment revenue excluding corporate and other operating segment | $ 3,805.4 | $ 4,190.9 | $ 4,717.9

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