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Consolidated Statements of Operations - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Nov. 28, 2017 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Apr. 01, 2017 | Dec. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018
Revenues |  | $ 1,117.4 | $ 1,106.4 | $ 1,149.0 | $ 1,250.6 | $ 1,397.1 | $ 1,412.6 | $ 1,309.4 | $ 1,462.7 | $ 1,326.2 | $ 4,252.6 | $ 4,623.4 | $ 5,581.8
Costs and expenses |  |  |  |  |  |  |  |  |  |  |  |  |
Operating costs and expenses (exclusive of items shown separately below) |  |  |  |  |  |  |  |  |  | 950.2 | 3,045.1 | 3,536.6 | 4,071.4
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  |  | 119.9 | 521.6 | 601.0 | 679.0
Asset retirement obligation expenses |  |  |  |  |  |  |  |  |  | 14.6 | 41.2 | 58.4 | 53.0
Selling and administrative expenses |  |  |  |  |  |  |  |  |  | 36.3 | 106.3 | 145.0 | 158.1
Restructuring charges | $ 3.0 | 23.0 |  |  |  |  |  |  |  | 0.0 | 7.6 | 24.3 | 1.2
Transaction costs related to business combinations and joint ventures |  | 11.8 | 8.2 |  |  | 4.9 |  |  |  | 0.0 | 0.0 | 21.6 | 7.4
Other operating (income) loss: |  |  |  |  |  |  |  |  |  |  |  |  |
Net gain on disposals |  |  |  |  |  |  | (20.7) |  | (30.6) | (22.8) | (84.0) | (2.1) | (48.2)
Gain on formation of United Wambo JV |  | (48.1) |  |  |  |  |  |  |  | 0.0 | 0.0 | (48.1) | 0.0
Asset impairment |  | 250.2 | 20.0 |  |  |  |  |  |  | 30.5 | 0.0 | 270.2 | 0.0
Provision for North Goonyella equipment loss |  | 58.5 |  |  | 24.7 | 17.1 | 49.3 |  |  | 0.0 | 0.0 | 83.2 | 66.4
North Goonyella insurance recovery |  |  |  |  | (125.0) |  |  |  |  | 0.0 | 0.0 | (125.0) | 0.0
Income from equity affiliates |  | (10.9) | (20.7) | (9.7) |  |  | (17.2) | (25.2) | (22.0) | (15.0) | (49.0) | (3.4) | (68.1)
Operating profit |  | (165.5) | (36.8) | 79.5 | 184.5 | 126.8 | 130.3 | 165.3 | 239.2 | 212.5 | 663.8 | 61.7 | 661.6
Interest expense |  | 36.8 | 35.4 | 36.0 | 35.8 | 36.5 | 38.2 | 38.3 | 36.3 | 32.9 | 119.7 | 144.0 | 149.3
Loss on early debt extinguishment |  |  |  |  |  |  |  |  |  | 0.0 | 20.9 | 0.2 | 2.0
Interest income |  | (4.5) | (7.0) | (7.2) | (8.3) | (9.3) | (10.1) | (7.0) | (7.2) | (2.7) | (5.6) | (27.0) | (33.6)
Net periodic benefit costs, excluding service cost |  |  |  |  |  |  |  |  |  | 14.4 | 21.9 | 19.4 | 18.1
Net mark-to-market adjustment on actuarially determined liabilities |  | 67.4 |  |  |  | 125.5 |  |  |  | 0.0 | (45.2) | 67.4 | (125.5)
Reorganization items, net |  |  |  |  |  |  |  |  | 12.8 | 627.2 | 0.0 | 0.0 | (12.8)
(Loss) income from continuing operations before income taxes |  |  |  |  |  |  |  |  |  | (459.3) | 552.1 | (142.3) | 664.1
Income tax provision (benefit) |  |  |  |  |  |  |  |  |  | (263.8) | (161.0) | 46.0 | 18.4
(Loss) income from continuing operations, net of income taxes |  | (290.2) | (74.3) | 42.9 | 133.3 | 233.5 | 83.9 | 120.0 | 208.3 | (195.5) | 713.1 | (188.3) | 645.7
Income (loss) from discontinued operations, net of income taxes |  |  |  |  |  |  |  |  |  | (16.2) | (19.8) | 3.2 | 18.1
Net (loss) income |  | (276.4) | (78.1) | 39.5 | 129.9 | 260.6 | 79.8 | 116.4 | 207.0 | (211.7) | 693.3 | (185.1) | 663.8
Less: Series A Convertible Preferred Stock dividends |  |  |  |  |  |  |  |  |  | 0.0 | 179.5 | 0.0 | 102.5
Less: Net income attributable to noncontrolling interests |  |  |  |  |  |  |  |  |  | 4.8 | 15.2 | 26.2 | 16.9
Net (loss) income attributable to common stockholders |  | $ (289.8) | $ (82.8) | $ 37.1 | $ 124.2 | $ 252.6 | $ 71.5 | $ 113.7 | $ 106.6 | $ (216.5) | $ 498.6 | $ (211.3) | $ 544.4
(Loss) income from continuing operations: |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (loss) income per share |  | $ (3.12) | $ (0.77) | $ 0.38 | $ 1.18 | $ 1.99 | $ 0.64 | $ 0.94 | $ 0.84 | $ (10.93) | $ 3.85 | $ (2.07) | $ 4.35
Diluted (loss) income per share |  | $ (3.12) | $ (0.77) | $ 0.37 | $ 1.15 | $ 1.97 | $ 0.63 | $ 0.93 | $ 0.83 | (10.93) | 3.81 | (2.07) | 4.28
Net (loss) income attributable to common stockholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (loss) income per share |  |  |  |  |  |  |  |  |  | (11.81) | 3.70 | (2.04) | 4.50
Diluted (loss) income per share |  |  |  |  |  |  |  |  |  | $ (11.81) | $ 3.67 | $ (2.04) | $ 4.43

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