Net Income Per Share - Summary of Net Income Per Share (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net income	$ 188.5	$ 173.8	$ 187.3	$ 151.2	$ 362.3	$ 338.5
Weighted average common shares outstanding (in shares)	74.4		74.0		74.4	74.0
Dilutive effect of equity awards, based on the treasury stock method (in shares)	1.4		1.7		1.5	1.8
Weighted average shares assuming dilution (in shares)	75.8		75.7		75.9	75.8