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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - Equity Component [Domain] - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Predecessor [Member] |  |  |  |
Net income (loss) |  | $ (28.0) |  | $ (78.8)
Amortization of actuarial (gains) losses, net |  | 0.3 |  | 0.6
Amortization of prior service costs (credits) |  | (0.1) |  | (0.2)
Other comprehensive income (loss), before tax |  | 0.2 |  | 0.4
Income tax expense related to items of other comprehensive income |  | (0.1) |  | (0.1)
Other comprehensive income (loss), net of tax |  | 0.1 |  | 0.3
Comprehensive income (loss) |  | $ (27.9) |  | $ (78.5)
Successor [Member] |  |  |  |
Net income (loss) | $ (15.1) |  | $ (30.5) |
Amortization of actuarial (gains) losses, net | 0.0 |  | 0.0 |
Amortization of prior service costs (credits) | 0.0 |  | (0.1) |
Other comprehensive income (loss), before tax | 0.0 |  | (0.1) |
Income tax expense related to items of other comprehensive income | 0.0 |  | 0.0 |
Other comprehensive income (loss), net of tax | 0.0 |  | (0.1) |
Comprehensive income (loss) | $ (15.1) |  | $ (30.6) |

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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=51664549&loc=SL4569616-111683 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591552-111686 + Details
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