Net Income (Loss) Per Common Share - Summary of Earnings Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Basic net income (loss) per common share:
Net income	$ 42.5	$ 42.7	$ 44.7	$ 17.8	$ 85.2	$ 62.5
Weighted average common shares outstanding - Basic (in shares)	84.7		84.4		84.6	84.3
Basic net income per common share	$ 0.50		$ 0.53		$ 1.01	$ 0.74
Diluted net income per common share:
Net income	$ 42.5		$ 44.7		$ 85.2	$ 62.5
Weighted average common shares outstanding - Basic (in shares)	84.7		84.4		84.6	84.3
Plus incremental shares from assumed conversions:
Weighted average common shares outstanding - Dilutive (in shares)	85.6		85.0		85.5	84.9
Diluted net income per common share	$ 0.50		$ 0.53		$ 1.00	$ 0.74
Restricted Stock Units
Plus incremental shares from assumed conversions:
Incremental shares from assumed conversions	0.5		0.4		0.5	0.4
Stock Options
Plus incremental shares from assumed conversions:
Incremental shares from assumed conversions	0.4		0.2		0.4	0.2