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Segment Information Segment Results (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Reportable segment results |  |
Revenues | $ 1,250.6 | $ 1,462.7
Total Adjusted EBITDA | 253.9 | 363.9
Net gain on disposals | 1.5 | 30.6
Iffley Land Transaction |  |
Reportable segment results |  |
Net gain on disposals |  | 20.6
Red Mountain Joint Venture |  |
Reportable segment results |  |
Net gain on disposals |  | 7.1
Seaborne Thermal Mining | Operating Segments |  |
Reportable segment results |  |
Revenues | 251.0 | 201.4
Total Adjusted EBITDA | 94.7 | 61.6
Seaborne Metallurgical Mining | Operating Segments |  |
Reportable segment results |  |
Revenues | 324.5 | 466.2
Total Adjusted EBITDA | 85.8 | 166.4
Powder River Basin Mining | Operating Segments |  |
Reportable segment results |  |
Revenues | 287.3 | 389.3
Total Adjusted EBITDA | 36.4 | 74.5
Midwestern U.S. Mining | Operating Segments |  |
Reportable segment results |  |
Revenues | 179.1 | 201.7
Total Adjusted EBITDA | 33.3 | 31.2
Western U.S. Mining | Operating Segments |  |
Reportable segment results |  |
Revenues | 155.7 | 143.7
Total Adjusted EBITDA | 42.6 | 32.0
Corporate and Other | Corporate, Non-Segment |  |
Reportable segment results |  |
Revenues | 53.0 | 60.4
Total Adjusted EBITDA | $ (38.9) | $ (1.8)

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