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	$ 3,619.6	$ 3,322.0	$ 2,342.1
Other comprehensive (loss) income:
Unrealized holding gains (losses) on marketable securities, net of tax of $(2.7), zero and zero, respectively	9.7	0.4	(0.8)
Unrealized (losses) gains on foreign currency forward contracts, net of tax of $14.0, $1.0 and $(21.8), respectively	(50.9)	(4.1)	83.2
Foreign currency translation adjustment	26.1	(11.4)	2.0
Total other comprehensive (loss) income	(15.1)	(15.1)	84.4
Comprehensive income	$ 3,604.5	$ 3,306.9	$ 2,426.5