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Accounts Payable and Accrued Expenses (Details) - Successor - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Accounts payable and accrued expenses [Line Items] |  |
Trade accounts payable | $ 281.7 | $ 388.0
Accrued payroll and related benefits | 209.3 | 239.7
Other accrued expenses | 184.9 | 197.7
Accrued taxes other than income | 111.4 | 111.7
Accrued royalties | 52.7 | 67.4
Asset retirement obligations | 63.8 | 34.1
Income taxes payable | 10.0 | 20.6
Accrued interest | 15.7 | 15.5
Accrued health care insurance | 10.0 | 10.6
Workers’ compensation obligations | 7.0 | 7.6
Intangible take-or-pay contracts | 20.3 | 27.6
Liabilities from coal trading activities | 1.2 | 11.7
Liabilities associated with discontinued operations | 54.0 | 70.6
Accounts payable and accrued expenses | $ 1,022.0 | $ 1,202.8

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