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Loss per common share (Tables) | 6 Months Ended
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Jun. 30, 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 June 30, |  | Six Months Ended June 30,
| 2023 |  | 2022 |  | 2023 |  | 2022
Numerator: |  |  |  |  |  |  |
Net loss | $ | (261.3) |  |  | $ | (56.4) |  |  | $ | (444.3) |  |  | $ | (60.1) |
Denominator: |  |  |  |  |  |  |
Weighted-average number of shares outstanding-basic | 50.7 |  |  | 50.0 |  |  | 50.5 |  |  | 50.3 |
Weighted-average number of shares outstanding-diluted | 50.7 |  |  | 50.0 |  |  | 50.5 |  |  | 50.3 |
Net loss per common share - basic | $ | (5.15) |  |  | $ | (1.13) |  |  | $ | (8.80) |  |  | $ | (1.19) |
Net loss per common share - diluted | $ | (5.15) |  |  | $ | (1.13) |  |  | $ | (8.80) |  |  | $ | (1.19) |
Anti-dilutive securities | 3.6 |  |  | 1.8 |  |  | 3.4 |  |  | 3.0 |

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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 -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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