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Earnings (loss) per common share (Tables)
3 Months Ended
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,
20232022
Numerator: 
Net loss$(183.0)$(3.7)
Denominator:
Weighted-average number of shares outstanding-basic50.2 50.7 
Weighted-average number of shares outstanding-diluted50.2 50.7 
Loss per common share - basic$(3.65)$(0.07)
Loss per common share - diluted$(3.65)$(0.07)
Anti-dilutive securities3.2 1.6