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Liabilities Subject to Compromise (Tables) | 12 Months Ended
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Dec. 31, 2016
Liabilities Subject to Compromise [Abstract] |
Schedule of Liabilities Subject to Compromise [Table Text Block] | Liabilities subject to compromise consisted of the following:
Previously Reported Balance Sheet Line |  | December 31, 2016
|  | (Dollars in millions)
Debt (1) |  | $ | 8,080.3 |
Interest payable |  | 172.6 |
Environmental liabilities |  | 61.9 |
Trade payables |  | 58.4 |
Postretirement benefit obligations (2) |  | 34.6 |
Other accrued liabilities |  | 32.4 |
Liabilities subject to compromise |  | $ | 8,440.2 |
(1) | Includes $7,771.2 million of first lien, second lien and unsecured debt, $257.3 million of derivative contract terminations, and $51.8 million of liabilities secured by prepetition letters of credit.
(2) | Includes liabilities for unfunded non-qualified pension plans, all the participants of which are former employees.

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