Net Income Per Share - Schedule of Net Income Per Share (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 161.3	$ 155.1	$ 140.0	$ 120.6	$ 188.5	$ 173.8	$ 456.4	$ 482.9
Weighted average common shares outstanding (in shares)	74.3			74.4			74.4	74.4
Dilutive effect of equity awards, based on the treasury stock method (in shares)	1.0			1.3			1.1	1.5
Weighted average shares assuming dilution (in shares)	75.3			75.7			75.5	75.9