Net Loss Per Common Share - Computations of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Earnings Per Share [Abstract]
Net loss	$ (24.0)	$ (27.9)
Basic weighted average common shares (in shares)	19.5	17.2
Effect of dilutive securities - dilutive securities (in shares)	0.0	0.0
Diluted weighted average common shares (in shares)	19.5	17.2
Basic net loss per common share (in dollars per share)	$ (1.23)	$ (1.62)
Diluted net loss per common share (in dollars per share)	$ (1.23)	$ (1.62)