Net Income Per Common Share - Schedule of Basic and Diluted Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net income to common shareholders	$ 72.9	$ 62.4	$ 194.3	$ 148.0
Basic weighted average shares outstanding (in shares)	221.0	220.6	221.3	222.0
Diluted weighted average shares outstanding (in shares)	221.9	221.2	222.1	222.6
Net income per common share:
Basic net income per share (in dollars per share)	$ 0.33	$ 0.28	$ 0.88	$ 0.67
Diluted net income per share (in dollars per share)	$ 0.33	$ 0.28	$ 0.87	$ 0.66