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Earnings (Loss) Per Share (Tables) | 6 Months Ended
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Jun. 30, 2019
Earnings Per Share [Abstract] |
Basic and diluted earnings (loss) per share | 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 |
Securities excluded from the calculation of diluted EPS |
| 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 Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -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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