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Income Taxes (Details 2) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Reconciliation of the expected statutory federal income tax provision to the Company's actual income tax provision |  |  |  |  |  |  |  |  |  |  |
Expected income tax benefit at U.S. federal statutory rate |  |  |  |  |  |  |  |  | $ (265.4) | $ (696.6) | $ (191.7)
Changes in valuation allowance, income tax |  |  |  |  |  |  |  |  | 2,453.9 | 452.9 | 534.7
Worthless Partnership Deduction |  |  |  |  |  |  |  |  | (2,204.4) | 0.0 | 0.0
Changes in tax reserves |  |  |  |  |  |  |  |  | 2.3 | (21.4) | (81.5)
Excess depletion |  |  |  |  |  |  |  |  | (37.2) | (53.7) | (65.3)
Foreign earnings repatriation |  |  |  |  |  |  |  |  | 0.0 | 0.0 | (71.4)
Foreign earnings provision differential |  |  |  |  |  |  |  |  | 27.5 | 146.5 | 28.8
General business tax credits |  |  |  |  |  |  |  |  | (14.2) | (15.7) | (19.2)
Minerals resource rent tax, net of federal tax |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 16.1
Remeasurement of foreign income tax accounts |  |  |  | $ 0.5 | $ (0.8) |  | $ (0.2) |  | (2.0) | (22.1) | (21.8)
State income taxes, net of federal tax benefit |  |  |  |  |  |  |  |  | (90.2) | (20.1) | (2.3)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Restructuring Charges, Percent |  |  |  |  |  |  |  |  | 29.6 |  |
Reorganization Items | $ 33.9 | $ 29.7 | $ 95.4 |  |  |  |  | $ 159.0 | 159.0 | 0.0 | 0.0
Other, net |  |  |  |  |  |  |  |  | 5.6 | 23.1 | 21.0
Income tax (benefit) provision |  |  |  | $ 7.9 |  | $ 67.4 |  | $ (22.7) | $ (94.5) | $ (207.1) | $ 147.4

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