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Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Apr. 01, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Predecessor |  |  |
Accounts payable and accrued expenses [Line Items] |  |  |
Trade accounts payable |  |  | $ 288.6
Accrued payroll and related benefits |  |  | 201.2
Other accrued expenses |  |  | 190.1
Accrued taxes other than income |  |  | 119.6
Accrued royalties |  |  | 62.8
Asset retirement obligations, current |  | $ 31.1 | 41.0
Income taxes payable |  |  | 6.2
Accrued interest |  |  | 1.2
Accrued health care insurance |  |  | 16.0
Workers' compensation obligations |  |  | 7.8
Liabilities associated with discontinued operations |  |  | 55.9
Accounts payable and accrued expenses |  |  | $ 990.4
Successor |  |  |
Accounts payable and accrued expenses [Line Items] |  |  |
Trade accounts payable | $ 388.0 |  |
Accrued payroll and related benefits | 239.7 |  |
Other accrued expenses | 225.3 |  |
Accrued taxes other than income | 111.7 |  |
Accrued royalties | 67.4 |  |
Asset retirement obligations, current | 34.1 |  |
Income taxes payable | 20.6 |  |
Accrued interest | 15.5 |  |
Accrued health care insurance | 10.6 |  |
Workers' compensation obligations | 7.6 |  |
Liabilities associated with discontinued operations | 70.6 |  |
Accounts payable and accrued expenses | $ 1,191.1 |  |

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- Definition Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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