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Liabilities Subject to Compromise (Notes) | 12 Months Ended
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Dec. 31, 2016
Liabilities Subject to Compromise [Abstract] |
Liabilities Subject to Compromise | (3) Liabilities Subject to Compromise Liabilities subject to compromise include unsecured or under-secured liabilities incurred prior to the Petition Date. These liabilities represent the amounts expected to be allowed on known or potential claims to be resolved through the Chapter 11 Cases and remain subject to future adjustments based on negotiated settlements with claimants, actions of the Bankruptcy Court, rejection of executory contracts, proofs of claims or other events. Additionally, liabilities subject to compromise also include certain items that may be assumed under a plan of reorganization, and as such, may be subsequently reclassified to liabilities not subject to compromise. Generally, actions to enforce or otherwise effect payment of prepetition liabilities are subject to the automatic stay or an approved motion of the Bankruptcy Court, as discussed in Note 1. "Summary of Significant Accounting Policies". 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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