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Discontinued Operations - Assets and Liabilities of Discontinued Operations (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Apr. 01, 2017 | Jun. 30, 2017 | Apr. 01, 2017 | Jun. 30, 2016 | Jun. 30, 2016 | Dec. 31, 2016
Liabilities: |  |  |  |  |  |
Liabilities subject to compromise | $ 8,416.7 |  | $ 8,416.7 |  |  | $ 8,440.2
Successor |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Loss from discontinued operations, net of income taxes |  | $ (2.7) |  |  |  |
Liabilities: |  |  |  |  |  |
Liabilities subject to compromise |  | 0.0 |  |  |  |
Predecessor |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Loss from discontinued operations, net of income taxes | $ (12.1) |  | $ (16.2) | $ (3.0) | $ (6.4) |
Liabilities: |  |  |  |  |  |
Liabilities subject to compromise |  |  |  |  |  | 8,440.2
Discontinued Operations, Held-for-sale or Disposed of by Sale | Successor |  |  |  |  |  |
Assets: |  |  |  |  |  |
Other current assets |  | 0.2 |  |  |  |
Investments and other assets |  | 0.0 |  |  |  |
Total assets classified as discontinued operations |  | 0.2 |  |  |  |
Liabilities: |  |  |  |  |  |
Accounts payable and accrued expenses |  | 55.8 |  |  |  |
Other noncurrent liabilities |  | 184.9 |  |  |  |
Liabilities subject to compromise |  | 0.0 |  |  |  |
Total liabilities classified as discontinued operations |  | $ 240.7 |  |  |  |
Discontinued Operations, Held-for-sale or Disposed of by Sale | Predecessor |  |  |  |  |  |
Assets: |  |  |  |  |  |
Other current assets |  |  |  |  |  | 0.2
Investments and other assets |  |  |  |  |  | 15.9
Total assets classified as discontinued operations |  |  |  |  |  | 16.1
Liabilities: |  |  |  |  |  |
Accounts payable and accrued expenses |  |  |  |  |  | 55.9
Other noncurrent liabilities |  |  |  |  |  | 198.5
Liabilities subject to compromise |  |  |  |  |  | 20.9
Total liabilities classified as discontinued operations |  |  |  |  |  | $ 275.3

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- Definition Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5C -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721675-107760 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(12)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e1012-107759 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721525-107759 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721523-107759 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e957-107759 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 + Details
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