Earnings (loss) per common share (Tables)

9 Months Ended

Sep. 30, 2024

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Net Loss per Common Share

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
Numerator:
Net income (loss)	$	114.8	$	(263.4)	$	(159.3)	$	(711.0)
Denominator:
Weighted-average number of shares outstanding-basic	53.1		51.8		52.6		50.9
Dilutive securities - equity awards	2.5		—		—		—
Weighted-average number of shares outstanding-diluted	55.6		51.8		52.6		50.9
Earnings (loss) per common share - basic	$	2.16	$	(5.08)	$	(3.03)	$	(13.97)
Earnings (loss) per common share - diluted	$	2.06	$	(5.08)	$	(3.03)	$	(13.97)
Anti-dilutive securities	2.6		4.0		4.4		3.6