CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 175.9	$ 161.1	$ 601.8	$ 526.6
Foreign currency translation	(77.2)	(172.3)	20.6	(304.5)
Unrealized gain/(loss) on available-for-sale debt securities, net of tax	0.1	(0.4)	0.2	(1.6)
Comprehensive (loss) income	$ 98.8	$ (11.6)	$ 622.6	$ 220.5