Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock	Treasury Stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive (loss) income, net
Beginning balance at Dec. 31, 2022	$ 3,465.3	$ 1.1	$ (131.0)	$ 1,455.1	$ 2,171.1	$ (31.0)
Increase (Decrease) in Stockholders' Equity
Cash dividends on common stock	(53.3)				(53.3)
Stock-based compensation	16.9			16.9
Repurchases of common stock from employee stock plans	(12.7)		(12.7)
Purchase of common stock	(70.0)		(70.0)
Shares issued under employee stock purchase plan	0.3			0.3
Net income	173.4				173.4
Other comprehensive income	18.8					18.8
Ending balance at Mar. 31, 2023	3,538.7	1.1	(213.7)	1,472.3	2,291.2	(12.2)
Beginning balance at Dec. 31, 2022	3,465.3	1.1	(131.0)	1,455.1	2,171.1	(31.0)
Increase (Decrease) in Stockholders' Equity
Net income	549.4
Ending balance at Sep. 30, 2023	3,788.3	1.1	(222.9)	1,506.0	2,555.5	(51.4)
Beginning balance at Mar. 31, 2023	3,538.7	1.1	(213.7)	1,472.3	2,291.2	(12.2)
Increase (Decrease) in Stockholders' Equity
Cash dividends on common stock	(53.2)				(53.2)
Stock-based compensation	9.1			9.1
Repurchases of common stock from employee stock plans	(0.3)		(0.3)
Purchase of common stock	(8.1)		(8.1)
Shares issued under employee stock purchase plan	0.6			0.6
Net income	167.8				167.8
Other comprehensive income	9.8					9.8
Ending balance at Jun. 30, 2023	3,664.4	1.1	(222.1)	1,482.0	2,405.8	(2.4)
Increase (Decrease) in Stockholders' Equity
Cash dividends on common stock	(58.5)				(58.5)
Stock-based compensation	9.1			9.1
Repurchases of common stock from employee stock plans	(0.8)		(0.8)
Purchase of common stock	0.0
Shares issued under employee stock purchase plan	14.9			14.9
Net income	208.2				208.2
Other comprehensive income	(49.0)					(49.0)
Ending balance at Sep. 30, 2023	3,788.3	1.1	(222.9)	1,506.0	2,555.5	(51.4)
Beginning balance at Dec. 31, 2023	3,985.0	1.1	(10.5)	1,478.6	2,525.2	(9.4)
Increase (Decrease) in Stockholders' Equity
Cash dividends on common stock	(58.5)				(58.5)
Stock-based compensation	11.7			11.7
Repurchases of common stock from employee stock plans	(25.5)		(25.5)
Purchase of common stock	(89.3)		(89.3)
Shares issued under employee stock purchase plan	5.0			5.0
Net income	209.5				209.5
Other comprehensive income	(13.8)					(13.8)
Ending balance at Mar. 31, 2024	4,024.1	1.1	(125.3)	1,495.3	2,676.2	(23.2)
Beginning balance at Dec. 31, 2023	3,985.0	1.1	(10.5)	1,478.6	2,525.2	(9.4)
Increase (Decrease) in Stockholders' Equity
Net income	568.4
Other comprehensive income						27.2
Ending balance at Sep. 30, 2024	4,208.3	1.1	(242.9)	1,521.7	2,910.6	17.8
Beginning balance at Mar. 31, 2024	4,024.1	1.1	(125.3)	1,495.3	2,676.2	(23.2)
Increase (Decrease) in Stockholders' Equity
Cash dividends on common stock	(58.2)				(58.2)
Stock-based compensation	10.3			10.3
Repurchases of common stock from employee stock plans	(1.7)		(1.7)
Purchase of common stock	(90.4)		(90.4)
Shares issued under employee stock purchase plan	0.4			0.4
Net income	140.4				140.4
Other comprehensive income	(3.2)					(3.2)
Ending balance at Jun. 30, 2024	4,021.7	1.1	(217.4)	1,506.0	2,758.4	(26.4)
Increase (Decrease) in Stockholders' Equity
Cash dividends on common stock	(66.3)				(66.3)
Stock-based compensation	10.1			10.1
Repurchases of common stock from employee stock plans	(0.9)		(0.9)
Purchase of common stock	(24.6)		(24.6)
Shares issued under employee stock purchase plan	5.6			5.6
Net income	218.5				218.5
Other comprehensive income	44.2					44.2
Ending balance at Sep. 30, 2024	$ 4,208.3	$ 1.1	$ (242.9)	$ 1,521.7	$ 2,910.6	$ 17.8