Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 646.3	$ 1,099.6
Other comprehensive (loss) income:
Unrealized holding gains (losses) on available-for-sale debt securities, net of tax of $(4.6) and $5.4, respectively	16.5	(19.7)
Unrealized (losses) gains on foreign currency forward contracts, net of tax of $25.6 and $(12.3), respectively	(90.3)	44.5
Foreign currency translation adjustment	14.1	6.8
Total other comprehensive (loss) income	(59.7)	31.6
Comprehensive income	$ 586.6	$ 1,131.2