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Earnings (loss) per common share (Tables) | 3 Months Ended
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Mar. 31, 2023
Earnings Per Share [Abstract] |
Basic and Diluted Net Income per Share | The following table presents the calculation of basic and diluted loss per share:
| Three Months Ended March 31, |  |
| 2023 |  | 2022 |  |  |  |
Numerator: |  |  |  |  |  |  |
Net loss | $ | (183.0) |  |  | $ | (3.7) |  |  |  |  |
Denominator: |  |  |  |  |  |  |
Weighted-average number of shares outstanding-basic | 50.2 |  |  | 50.7 |  |  |  |  |
Weighted-average number of shares outstanding-diluted | 50.2 |  |  | 50.7 |  |  |  |  |
Loss per common share - basic | $ | (3.65) |  |  | $ | (0.07) |  |  |  |  |
Loss per common share - diluted | $ | (3.65) |  |  | $ | (0.07) |  |  |  |  |
Anti-dilutive securities | 3.2 |  |  | 1.6 |  |  |  |  |

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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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