Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 2,342.1	$ 2,711.7	$ 1,176.8
Other comprehensive income:
Unrealized holding (losses) gains on marketable securities, net	(0.8)	(0.2)	1.0
Unrealized gains (losses) on foreign currency forward contracts, net of tax of $(21.8), $14.3 and $7.0, respectively	83.2	(51.6)	(14.0)
Foreign currency translation adjustment	2.0	(14.7)	10.3
Total other comprehensive income (loss)	84.4	(66.5)	(2.7)
Comprehensive income	$ 2,426.5	$ 2,645.2	$ 1,174.1