CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 870.5	$ 671.8	$ 587.1
Foreign currency translation	128.6	(137.5)	(9.3)
Unrealized gain/(loss) on available-for-sale debt securities, net of tax	0.7	(1.5)	(0.1)
Comprehensive income	$ 999.8	$ 532.8	$ 577.7