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Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Accounts payable and accrued expenses [Line Items] |  |  |
Trade accounts payable |  | $ 288.6 | $ 333.3
Commodity and foreign currency hedge contracts |  | 0.0 | 231.7
Other accrued expenses |  | 190.1 | 225.8
Accrued payroll and related benefits |  | 201.2 | 191.9
Accrued royalties |  | 119.6 | 135.9
Payable to voluntary employee beneficiary association for certain Patriot retirees | [1] | 0.0 | 75.0
Accrued royalties |  | 62.8 | 41.0
Accrued interest |  | 1.2 | 68.8
Asset Retirement Obligations |  | 41.0 | 25.5
Accrued environmental cleanup-related costs |  | 0.0 | 23.9
Accounts Payable, Other |  | 0.0 | 2.3
Workers' compensation obligations |  | 7.8 | 8.6
Income taxes payable |  | 6.2 | 6.8
Accrued health care insurance |  | 16.0 | 15.8
Liabilities associated with discontinued operations |  | 55.9 | 60.0
Total accounts payable and accrued expenses |  | $ 990.4 | $ 1,446.3
[1] | Refer to Note 27. "Matters Related to the Bankruptcy of Patriot Coal Corporation" herein for additional details related to this transaction.

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