CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (UNAUDITED) - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Retained Earnings
Beginning Balance, Value at Dec. 31, 2021	$ 4,196.9	$ 30.1	$ 849.4	$ (673.9)	$ (9.4)	$ 4,000.7
Beginning Balance, Shares at Dec. 31, 2021		282.5
Net income	220.3					220.3
Net unrealized holding (loss) gain on available-for- sale securities	(0.9)				(0.9)
Foreign currency translation	(2.1)				(2.1)
Employee stock purchase plan	2.7		2.7
Stock incentive plans	17.5	$ 0.2	17.3
Stock incentive plans, Shares		1.7
Repurchase shares to fund tax withholdings for non-cash stock-based compensation	(46.0)	$ (0.1)	(45.9)
Repurchase shares to fund tax withholdings for non-cash stock-based compensation, shares		(0.7)
Purchase of treasury stock	(24.1)			(24.1)
Purchase of treasury stock, Shares		(0.4)
Cash dividends paid	(28.9)					(28.9)
Ending Balance, Value at Mar. 31, 2022	4,335.4	$ 30.2	823.5	(698.0)	(12.4)	4,192.1
Ending Balance, Shares at Mar. 31, 2022		283.1
Beginning Balance, Value at Dec. 31, 2022	$ 4,606.6	$ 30.3	919.7	(748.0)	(148.4)	4,553.0
Beginning Balance, Shares at Dec. 31, 2022	283.2	283.2
Net income	$ 235.5					235.5
Net unrealized holding (loss) gain on available-for- sale securities	0.3				0.3
Foreign currency translation	47.1				47.1
Employee stock purchase plan	3.4		3.4
Stock incentive plans	21.0	$ 0.1	20.9
Stock incentive plans, Shares		1.0
Repurchase shares to fund tax withholdings for non-cash stock-based compensation	(36.2)	$ (0.1)	(36.1)
Repurchase shares to fund tax withholdings for non-cash stock-based compensation, shares		(0.6)
Purchase of treasury stock	(0.1)			(0.1)
Cash dividends paid	(32.6)					(32.6)
Ending Balance, Value at Mar. 31, 2023	$ 4,845.0	$ 30.3	$ 907.9	$ (748.1)	$ (101.0)	$ 4,755.9
Ending Balance, Shares at Mar. 31, 2023	283.6	283.6