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Net Loss Per Share - Basic and Diluted Loss per Common Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Earnings Per Share [Abstract]    
Net loss $ (81.9) $ (63.4)
Weighted average number of common shares outstanding, basic (in shares) 53.3 53.0
Weighted average number of common shares outstanding, diluted (in shares) 53.3 53.0
Net loss per common share - basic (in dollars per share) $ (1.54) $ (1.20)
Net loss per common share - diluted (in dollars per share) $ (1.54) $ (1.20)