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Net Income Per Share (Tables) | 9 Months Ended
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Sep. 30, 2015
Earnings Per Share [Abstract] |
Schedule of Net Income Per Share |
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| Successor |  |  | Predecessor |  | Successor |  |  | Predecessor
(in millions, except per share amounts) | 2015 |  |  | 2014 |  | 2015 |  |  | 2014
Numerators: |  |  |  |  |  |  |  |  |
Net income (loss) - basic | $ | (55.1 | ) |  |  | $ | 418.9 |  |  | $ | (85.6 | ) |  |  | $ | 340.1 |
Interest expense on convertible notes | — |  |  |  | 3.0 |  |  | — |  |  |  | 9.0 |
Net income (loss), if converted - diluted | $ | (55.1 | ) |  |  | $ | 421.9 |  |  | $ | (85.6 | ) |  |  | $ | 349.1 |
Denominator: |  |  |  |  |  |  |  |  |
Weighted average common shares | 9.1 |  |  |  | 5.0 |  |  | 9.0 |  |  |  | 5.0 |
Less: Weighted average unvested restricted stock | — |  |  |  | 0.1 |  |  | — |  |  |  | 0.1 |
Denominator for basic calculation | 9.1 |  |  |  | 4.9 |  |  | 9.0 |  |  |  | 4.9 |
Weighted average effect of dilutive securities: |  |  |  |  |  |  |  |  |
Stock compensation awards (a) | — |  |  |  | — |  |  | — |  |  |  | — |
Convertible notes | — |  |  |  | 1.8 |  |  | — |  |  |  | 1.8 |
Convertible preferred stock: |  |  |  |  |  |  |  |  |  |  |
Equivalent common shares | — |  |  |  | 35.8 |  |  | — |  |  |  | 27.2 |
Less: share issuance limitation (b) | — |  |  |  | 34.9 |  |  | — |  |  |  | 26.3 |
Net allowable common shares | — |  |  |  | 0.9 |  |  | — |  |  |  | 0.9 |
Subtotal | — |  |  |  | 2.7 |  |  | — |  |  |  | 2.7 |
Less: shares excluded in a period of a net loss | — |  |  |  | — |  |  | — |  |  |  | — |
Weighted average effect of dilutive securities | — |  |  |  | 2.7 |  |  | — |  |  |  | 2.7 |
Denominator for diluted calculation | 9.1 |  |  |  | 7.6 |  |  | 9.0 |  |  |  | 7.6 |
Net income (loss) per share - basic | $ | (6.05 | ) |  |  | $ | 85.49 |  |  | $ | (9.51 | ) |  |  | $ | 69.41 |
Net income (loss) per share - diluted | $ | (6.05 | ) |  |  | $ | 55.51 |  |  | $ | (9.51 | ) |  |  | $ | 45.93 |
Schedule of Securities Excluded from Net Income Per Share |
| Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
| Successor |  |  |  | Predecessor |  |  | Successor |  |  |  | Predecessor |
| 2015 |  |  |  | 2014 |  |  | 2015 |  |  |  | 2014 |
Options excluded from diluted net income per share | 382,500 |  |  |  |  | 200 |  |  |  | 382,500 |  |  |  |  | 200 |  |
Warrants excluded from diluted net income per share | N/A |  |  |  |  | 250,000 |  |  |  | N/A |  |  |  |  | 250,000 |  |
Exercise price of excluded options | $ | 3.90 |  | to |  |  | $ | 283.25 |  | to |  | $ | 3.90 |  | to |  |  | $ | 283.25 |  | to
| $ | 5.62 |  |  |  |  | $ | 357.00 |  |  |  | $ | 5.62 |  |  |  |  | $ | 357.00 |  |
Exercise price of excluded warrants | N/A |  |  |  |  | $ | 187.50 |  |  |  | N/A |  |  |  |  | $ | 187.50 |  |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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