Earning (Loss) Per Share - Schedule of Calculation of Numerator and Denominator in Earning (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator
Net loss	$ (28.1)	$ (24.6)
Denominator
Basic weighted average number of common shares outstanding for all classes of common shares (in shares)	47.2	49.2
Plus: effect of dilutive equity incentive instruments (in shares)	0.0	0.0
Diluted weighted average number of common shares outstanding for all classes of common shares (in shares)	47.2	49.2
Loss per share
Basic (USD per share)	$ (0.60)	$ (0.50)
Diluted (USD per share)	(0.60)	(0.50)
Cash dividends paid per common share for all classes of common shares (USD per share)	$ 0.05	$ 0