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Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2017
Valuation and Qualifying Accounts [Abstract] |
Valuation and Qualifying Accounts | PEABODY ENERGY CORPORATION SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
Description |  | Balance at Beginning of Period |  | Charged to Costs and Expenses |  | Charged to Other Accounts |  | Deductions(1) |  | Other |  | Balance at End of Period
|  | (Dollars in millions)
Successor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
April 2 through December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |
Reserves deducted from asset accounts: |  |  |  |  |  |  |  |  |  |  |  |  |
Advance royalty recoupment reserve |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Reserve for materials and supplies |  | — |  |  | 1.0 |  |  | — |  |  | (0.4 | ) |  | — |  |  | 0.6 |
Allowance for doubtful accounts |  | — |  |  | 4.6 |  |  | — |  |  | — |  |  | — |  |  | 4.6 |
Tax valuation allowances |  | 3,288.4 |  |  | (744.9 | ) |  | — |  |  | — |  |  | (111.0 | ) | (6) | 2,432.5 |
Predecessor |  |  |  |  |  |  |  |  |  |  |  |
January 1 through April 1, 2017 |  |  |  |  |  |  |  |  |  |  |  |
Reserves deducted from asset accounts: |  |  |  |  |  |  |  |  |  |  |  |
Advance royalty recoupment reserve |  | $ | 7.8 |  |  | $ | — |  |  | $ | (7.4 | ) | (5) | $ | (0.4 | ) |  | $ | — |  |  | $ | — |
Reserve for materials and supplies |  | 5.6 |  |  | 0.5 |  |  | (6.1 | ) | (5) | — |  |  | — |  |  | — |
Allowance for doubtful accounts |  | 13.1 |  |  | — |  |  | (12.8 | ) | (5) | (0.3 | ) |  | — |  |  | — |
Tax valuation allowances |  | 4,037.5 |  |  | (777.2 | ) |  | 28.1 |  | (5) | — |  |  | — |  |  | 3,288.4 |
Year Ended December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reserves deducted from asset accounts: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advance royalty recoupment reserve |  | $ | 8.3 |  |  | $ | 0.5 |  |  | $ | — |  |  | $ | (1.0 | ) | (2) | $ | — |  |  | $ | 7.8 |
Reserve for materials and supplies |  | 4.7 |  |  | 4.3 |  |  | — |  |  | (3.4 | ) |  | — |  |  | 5.6 |
Allowance for doubtful accounts |  | 6.6 |  |  | 7.9 |  |  | — |  |  | (1.4 | ) |  | — |  |  | 13.1 |
Tax valuation allowances |  | 1,614.1 |  |  | 2,453.9 |  |  | — |  |  | — |  |  | (30.5 | ) | (3) | 4,037.5 |
Year Ended December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reserves deducted from asset accounts: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advance royalty recoupment reserve |  | $ | 7.6 |  |  | $ | — |  |  | $ | — |  |  | $ | (0.9 | ) | (2) | $ | 1.6 |  | (4) | $ | 8.3 |
Reserve for materials and supplies |  | 4.6 |  |  | 0.4 |  |  | — |  |  | (0.3 | ) |  | — |  |  | 4.7 |
Allowance for doubtful accounts |  | 5.8 |  |  | 8.0 |  |  | — |  |  | (7.2 | ) |  | — |  |  | 6.6 |
Tax valuation allowances |  | 1,366.5 |  |  | 452.9 |  |  | — |  |  | — |  |  | (205.3 | ) | (3) | 1,614.1 |
(1) | Reserves utilized, unless otherwise indicated.
(2) | Deductions to advance royalty recoupment reserve represents the termination of federal and state leases.
(3) | Includes the impact of the decrease in Australian dollar exchange rates.
(4) | Balances transferred from other accounts.
(5) | Fresh start reporting adjustments.
(6) | Release of valuation allowance primarily related to carrybacks of U.S. net operating losses.

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -URI http://asc.fasb.org/topic&trid=2122369 + Details
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- References No definition available. + Details
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