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v3.10.0.1

Segment and Geographic Information Segment Results (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 01, 2017 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Apr. 01, 2017 | Mar. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2016
Successor |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ 1,397.1 | $ 1,412.6 | $ 1,309.4 | $ 1,462.7 | $ 1,517.1 | $ 1,477.2 | $ 1,258.3 |  |  | $ 4,252.6 | $ 5,581.8 |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  |  | 1,145.3 | 1,379.3 |
Additions to property, plant, equipment and mine development |  |  |  |  |  |  |  |  |  |  | 166.6 | 301.0 |
Federal coal lease expenditures |  |  |  |  |  |  |  |  |  |  | 0.0 | 0.5 |
Income from equity affiliates |  |  | $ (17.2) | $ (25.2) | $ (22.0) | $ (22.8) | $ (10.5) | $ (15.7) |  |  | (49.0) | (68.1) |
Successor | Powder River Basin Mining |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 1,178.7 | 1,424.8 |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  |  | 278.8 | 284.5 |
Additions to property, plant, equipment and mine development |  |  |  |  |  |  |  |  |  |  | 32.6 | 81.0 |
Federal coal lease expenditures |  |  |  |  |  |  |  |  |  |  |  | 0.0 |
Income from equity affiliates |  |  |  |  |  |  |  |  |  |  | 0.0 | 0.0 |
Successor | Midwestern U.S. Mining |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 592.3 | 801.0 |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  |  | 124.4 | 145.2 |
Additions to property, plant, equipment and mine development |  |  |  |  |  |  |  |  |  |  | 21.7 | 46.6 |
Federal coal lease expenditures |  |  |  |  |  |  |  |  |  |  |  | 0.0 |
Income from equity affiliates |  |  |  |  |  |  |  |  |  |  | 0.0 | 0.0 |
Successor | Western U.S. Mining |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 440.7 | 592.0 |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  |  | 131.8 | 145.4 |
Additions to property, plant, equipment and mine development |  |  |  |  |  |  |  |  |  |  | 13.8 | 13.9 |
Federal coal lease expenditures |  |  |  |  |  |  |  |  |  |  |  | 0.5 |
Income from equity affiliates |  |  |  |  |  |  |  |  |  |  | 0.0 | 0.0 |
Successor | Seaborne Metallurgical Mining |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 1,221.0 | 1,553.0 |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  |  | 414.9 | 441.4 |
Additions to property, plant, equipment and mine development |  |  |  |  |  |  |  |  |  |  | 56.0 | 88.7 |
Federal coal lease expenditures |  |  |  |  |  |  |  |  |  |  |  | 0.0 |
Income from equity affiliates |  |  |  |  |  |  |  |  |  |  | 0.0 | 0.0 |
Successor | Seaborne Thermal Mining |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 772.5 | 1,099.2 |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  |  | 306.6 | 452.0 |
Additions to property, plant, equipment and mine development |  |  |  |  |  |  |  |  |  |  | 39.2 | 66.6 |
Federal coal lease expenditures |  |  |  |  |  |  |  |  |  |  |  | 0.0 |
Income from equity affiliates |  |  |  |  |  |  |  |  |  |  | 0.0 | 0.0 |
Successor | Corporate and Other |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 47.4 | 111.8 |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  |  | (111.2) | (89.2) |
Additions to property, plant, equipment and mine development |  |  |  |  |  |  |  |  |  |  | 3.3 | 4.2 |
Federal coal lease expenditures |  |  |  |  |  |  |  |  |  |  |  | 0.0 |
Income from equity affiliates |  |  |  |  |  |  |  |  |  |  | $ (49.0) | $ (68.1) |
Predecessor |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 0.0 |  |  |  |  |  |  |  | $ 1,326.2 | $ 1,326.2 |  |  | $ 4,715.3
Adjusted EBITDA |  |  |  |  |  |  |  |  | 341.3 |  |  |  | 532.0
Additions to property, plant, equipment and mine development |  |  |  |  |  |  |  |  | 32.8 |  |  |  | 126.6
Federal coal lease expenditures |  |  |  |  |  |  |  |  | 0.5 |  |  |  | 249.0
Income from equity affiliates |  |  |  |  |  |  |  |  | (15.0) | $ (15.0) |  |  | (16.2)
Predecessor | Powder River Basin Mining |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 394.3 |  |  |  | 1,473.3
Adjusted EBITDA |  |  |  |  |  |  |  |  | 91.7 |  |  |  | 379.9
Additions to property, plant, equipment and mine development |  |  |  |  |  |  |  |  | 19.3 |  |  |  | 33.0
Federal coal lease expenditures |  |  |  |  |  |  |  |  | 0.0 |  |  |  | 248.4
Income from equity affiliates |  |  |  |  |  |  |  |  | 0.0 |  |  |  | 0.0
Predecessor | Midwestern U.S. Mining |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 193.2 |  |  |  | 792.5
Adjusted EBITDA |  |  |  |  |  |  |  |  | 50.0 |  |  |  | 217.3
Additions to property, plant, equipment and mine development |  |  |  |  |  |  |  |  | 2.8 |  |  |  | 18.7
Federal coal lease expenditures |  |  |  |  |  |  |  |  | 0.0 |  |  |  | 0.0
Income from equity affiliates |  |  |  |  |  |  |  |  | 0.0 |  |  |  | 0.0
Predecessor | Western U.S. Mining |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 149.7 |  |  |  | 526.0
Adjusted EBITDA |  |  |  |  |  |  |  |  | 50.0 |  |  |  | 101.6
Additions to property, plant, equipment and mine development |  |  |  |  |  |  |  |  | 3.1 |  |  |  | 20.8
Federal coal lease expenditures |  |  |  |  |  |  |  |  | 0.5 |  |  |  | 0.6
Income from equity affiliates |  |  |  |  |  |  |  |  | 0.0 |  |  |  | 0.0
Predecessor | Seaborne Metallurgical Mining |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 328.9 |  |  |  | 1,090.4
Adjusted EBITDA |  |  |  |  |  |  |  |  | 109.6 |  |  |  | (16.3)
Additions to property, plant, equipment and mine development |  |  |  |  |  |  |  |  | 5.2 |  |  |  | 29.9
Federal coal lease expenditures |  |  |  |  |  |  |  |  | 0.0 |  |  |  | 0.0
Income from equity affiliates |  |  |  |  |  |  |  |  | 0.0 |  |  |  | 0.0
Predecessor | Seaborne Thermal Mining |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 224.8 |  |  |  | 824.9
Adjusted EBITDA |  |  |  |  |  |  |  |  | 75.6 |  |  |  | 217.6
Additions to property, plant, equipment and mine development |  |  |  |  |  |  |  |  | 2.3 |  |  |  | 22.1
Federal coal lease expenditures |  |  |  |  |  |  |  |  | 0.0 |  |  |  | 0.0
Income from equity affiliates |  |  |  |  |  |  |  |  | 0.0 |  |  |  | 0.0
Predecessor | Corporate and Other |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 35.3 |  |  |  | 8.2
Adjusted EBITDA |  |  |  |  |  |  |  |  | (35.6) |  |  |  | (368.1)
Additions to property, plant, equipment and mine development |  |  |  |  |  |  |  |  | 0.1 |  |  |  | 2.1
Federal coal lease expenditures |  |  |  |  |  |  |  |  | 0.0 |  |  |  | 0.0
Income from equity affiliates |  |  |  |  |  |  |  |  | $ (15.0) |  |  |  | $ (16.2)

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