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Net Income (loss) per common share (Tables) | 12 Months Ended
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Dec. 31, 2022
Earnings Per Share [Abstract] |
Schedule of Net Income Per Share, Basic and Diluted | The following table presents the calculation of basic and diluted net income (loss) per common share:
| Year Ended December 31,
2022 |  | 2021 |  | 2020
Numerator: |  |  |  |  |
Net income (loss) | $ | (223.8) |  |  | $ | 230.9 |  |  | $ | 305.1 |
Denominator: |  |  |  |  |
Weighted-average number of shares-basic | 50.1 |  |  | 53.5 |  |  | 52.7 |
Dilutive effect of employee incentive plans | — |  |  | 0.6 |  |  | 1.1 |
Weighted-average number of shares-diluted | 50.1 |  |  | 54.1 |  |  | 53.8 |
Net income (loss) per common share - basic | $ | (4.47) |  |  | $ | 4.32 |  |  | $ | 5.79 |
Net income (loss) per common share - diluted | $ | (4.47) |  |  | $ | 4.27 |  |  | $ | 5.67 |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | The following table presents the share-based awards that are not considered in the diluted net income (loss) per common share calculation generally because the exercise price of the awards was greater than the average per share closing price during the year ending December 31, 2022, 2021 and 2020. In certain instances, awards may be anti-dilutive even if the average market price exceeds the exercise price when the sum of the assumed proceeds exceeds the difference between the market price and the exercise price.
| Year Ended December 31,
2022 |  | 2021 |  | 2020
Anti-dilutive stock awards | 2.8 |  |  | 1.0 |  |  | — |

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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 https://asc.fasb.org/extlink&oid=124432515&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://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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