CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 190.4	$ 145.2	$ 425.9	$ 365.5
Foreign currency translation	50.7	(130.1)	97.8	(132.2)
Unrealized gain/(loss) on available-for-sale debt securities, net of tax	(0.2)	(0.3)	0.1	(1.2)
Comprehensive (loss) income	$ 240.9	$ 14.8	$ 523.8	$ 232.1