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Earnings (Loss) Per Share | 6 Months Ended
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Jun. 30, 2019
Earnings Per Share [Abstract] |
Earnings (Loss) Per Share | Earnings (Loss) Per Share Basic earnings (loss) per share ("EPS") amounts are calculated by dividing net income (loss) allocated to common stockholders by the weighted average number of common shares outstanding during the period. Diluted EPS amounts assume the issuance of common stock for all potentially dilutive securities. The following table shows the basic and diluted earnings (loss) per share:
| For the three months ended June 30,
| 2019 |  | 2018
| Net Income (Loss) |  | Shares (in millions) |  | Per Share |  | Net Income (Loss) |  | Shares (in millions) |  | Per Share
Net income (loss) | $ | (20.7 | ) |  |  |  |  |  | $ | 19.4 |  |  |  |  |
Amount allocated to common stockholders | 100.0 | % |  |  |  |  |  | 92.2 | % |  |  |  |
Basic EPS: |  |  |  |  |  |  |  |  |  |  |
Net income (loss) allocated to common stockholders | $ | (20.7 | ) |  | 88.8 |  |  | $ | (0.23 | ) |  | $ | 17.9 |  |  | 87.6 |  |  | $ | 0.20 |
Effect of Dilutive Securities: |  |  |  |  |  |  |  |  |  |  |
Share-based compensation | — |  |  | — |  |  |  |  | — |  |  | 0.8 |  |  |
Diluted EPS: |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) allocated to common stockholders with assumed conversion | $ | (20.7 | ) |  | 88.8 |  |  | $ | (0.23 | ) |  | $ | 17.9 |  |  | 88.4 |  |  | $ | 0.20 |
| For the six months ended June 30,
| 2019 |  | 2018
| Net Income (Loss) |  | Shares (in millions) |  | Per Share |  | Net Income (Loss) |  | Shares (in millions) |  | Per Share
Net income (loss) | $ | (55.3 | ) |  |  |  |  |  | $ | 19.1 |  |  |  |  |
Amount allocated to common stockholders | 100.0 | % |  |  |  |  |  | 92.2 | % |  |  |  |
Basic EPS: |  |  |  |  |  |  |  |  |  |  |
Net income (loss) allocated to common stockholders | $ | (55.3 | ) |  | 88.5 |  |  | $ | (0.63 | ) |  | $ | 17.6 |  |  | 87.6 |  |  | $ | 0.20 |
Effect of Dilutive Securities: |  |  |  |  |  |  |  |  |  |  |
Share-based compensation | — |  |  | — |  |  |  |  | — |  |  | 0.8 |  |  |
Diluted EPS: |  |  |  |  |  |  |  |  |  |  |
Net income (loss) allocated to common stockholders with assumed conversion | $ | (55.3 | ) |  | 88.5 |  |  | $ | (0.63 | ) |  | $ | 17.6 |  |  | 88.4 |  |  | $ | 0.20 |
| Three months ended June 30, |  | Six months ended June 30,
Securities excluded from the calculation of diluted EPS (in millions)(1): | 2019 |  | 2018 |  | 2019 |  | 2018
Share-based compensation | 0.7 |  |  | 0.6 |  |  | 0.6 |  |  | 0.6 |
(1) In periods when we report a net loss, all share-based compensation awards are excluded from the calculation of diluted weighted average shares outstanding because of their anti-dilutive effect on earnings (loss) per share.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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