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Loss per common share (Tables)

12 Months Ended

Dec. 31, 2024

Earnings Per Share [Abstract]

Schedule of Net Loss Per Share, Basic and Diluted

The following table presents the calculation of basic and diluted loss per common share:

			Year Ended December 31,
			2024						2023						2022
Numerator:
Net loss			$	(190.6)					$	(760.5)					$	(211.6)
Denominator:
Weighted-average number of shares-basic			53.0						51.2						50.1
Dilutive securities - equity awards			—						—						—
Weighted-average number of shares-diluted			53.0						51.2						50.1
Net loss per common share - basic			$	(3.60)					$	(14.85)					$	(4.22)
Net loss per common share - diluted			$	(3.60)					$	(14.85)					$	(4.22)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following table presents the securities and equity awards that are not considered in the diluted 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, 2024, 2023 and 2022 or the period resulted in a net loss, thus making the awards anti-dilutive. 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,
			2024						2023						2022
Anti-dilutive stock awards			4.9						3.6						2.8

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- References

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

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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

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