Net Income 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, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Basic net income (loss) per common share:
Net income	$ 50.0	$ 36.5	$ 42.5	$ 42.7	$ 86.5	$ 85.2
Weighted average common shares outstanding - Basic (in shares)	82.5		84.7		83.2	84.6
Basic net income per common share	$ 0.61		$ 0.5		$ 1.04	$ 1.01
Diluted net income per common share:
Net income	$ 50.0		$ 42.5		$ 86.5	$ 85.2
Weighted average common shares outstanding - Basic (in shares)	82.5		84.7		83.2	84.6
Plus incremental shares from assumed conversions:
Weighted average common shares outstanding - Dilutive (in shares)	83.2		85.6		84.0	85.5
Diluted net income per common share	$ 0.6		$ 0.5		$ 1.03	$ 1
Restricted Stock Units
Plus incremental shares from assumed conversions:
Incremental shares from assumed conversions	0.4		0.5		0.4	0.5
Stock Options
Plus incremental shares from assumed conversions:
Incremental shares from assumed conversions	0.3		0.4		0.4	0.4