Shareholders' Equity - Change in Shareholders' Equity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	$ 2,881.0	$ 2,684.9
Balance (in shares)	1,800,000
Net income	$ 115.3	140.0
Activity related to stock-based compensation	$ 14.4	$ 11.0
Shares purchased under share repurchase program (in shares)	729,679	183,360
Shares purchased under share repurchase program	$ (267.0)	$ (60.1)
Dividends declared	(14.6)	(14.2)
Other comprehensive income (loss), net of tax	(48.5)	14.6
Balance, end of period	$ 2,680.6	$ 2,776.2
Balance (in shares)	2,300,000
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance (in shares)	75,300,000	75,300,000
Balance, beginning of period	$ 18.8	$ 18.8
Balance (in shares)	75,300,000	75,300,000
Balance, end of period	$ 18.8	$ 18.8
Capital in Excess of Par Value
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	120.2	232.2
Activity related to stock-based compensation	(65.0)	(50.8)
Balance, end of period	55.2	181.4
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	$ (637.6)	$ (370.9)
Balance (in shares)	1,800,000	1,200,000
Activity related to stock -based compensation (in shares)	(200,000)	(300,000)
Activity related to stock-based compensation	$ 79.4	$ 61.8
Shares purchased under share repurchase program (in shares)	700,000	200,000
Shares purchased under share repurchase program	$ (267.0)	$ (60.1)
Balance, end of period	$ (825.2)	$ (369.2)
Balance (in shares)	2,300,000	1,100,000
Retained earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	$ 3,523.4	$ 2,987.8
Net income	115.3	140.0
Dividends declared	(14.6)	(14.2)
Balance, end of period	3,624.1	3,113.6
Accumulated other comprehensive loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	(143.8)	(183.0)
Other comprehensive income (loss), net of tax	(48.5)	14.6
Balance, end of period	$ (192.3)	$ (168.4)