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Net Income (Loss) Per Common Share | 6 Months Ended
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Jun. 30, 2021
Earnings Per Share [Abstract] |
Net Income (Loss) Per Common Share | Note 2 — Net Income (Loss) Per Common Share
|  | Quarter Ended June 30, |  |  | Six Months Ended June 30, |
(In millions, except per share data) |  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Basic net income (loss) per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 2.2 |  |  | $ | (1.0 | ) |  | $ | (11.8 | ) |  | $ | 41.4 |
Weighted average common shares outstanding |  |  | 84.1 |  |  |  | 83.7 |  |  |  | 84.0 |  |  |  | 83.7 |
Basic net income (loss) per common share |  | $ | 0.03 |  |  | $ | (0.01 | ) |  | $ | (0.14 | ) |  | $ | 0.49 |
Diluted net income (loss) per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  | 2.2 |  |  |  | (1.0 | ) |  |  | (11.8 | ) |  |  | 41.4 |
Weighted average common shares outstanding — Basic |  |  | 84.1 |  |  |  | 83.7 |  |  |  | 84.0 |  |  |  | 83.7 |
Plus incremental shares from assumed conversions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock units |  |  | 0.3 |  |  |  | — |  |  |  | — |  |  |  | 0.2 |
Stock options |  |  | 0.3 |  |  |  | — |  |  |  | — |  |  |  | 0.2 |
Weighted average common shares outstanding — Dilutive |  |  | 84.7 |  |  |  | 83.7 |  |  |  | 84.0 |  |  |  | 84.1 |
Diluted net income (loss) per common share |  | $ | 0.03 |  |  | $ | (0.01 | ) |  | $ | (0.14 | ) |  | $ | 0.49 |
Total common stock equivalents of 0.7 million and 1.6 million were excluded from the computation of diluted net income (loss) per share for the quarter ended June 30, 2021 and 2020, respectively, because to do so would have been anti-dilutive. Total common stock equivalents of 1.1 million and 0.8 million were excluded from the computation of diluted net income (loss) per share for the six months ended June 30, 2021 and 2020, respectively, because to do so would have been anti-dilutive.

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