Condensed Consolidated Statements of Comprehensive Income - 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	$ 1,035.3	$ 930.5	$ 2,650.8	$ 2,503.1
Other comprehensive income (loss):
Unrealized holding losses on marketable securities, net of tax of $1.7, zero, $5.2 and zero, respectively	(6.2)	(0.6)	(18.8)	(3.6)
Unrealized gains on foreign currency forward contracts, net of tax of $(13.2), $(16.0), $(1.6) and $(34.3), respectively	48.0	58.8	5.9	128.1
Foreign currency translation adjustment	(5.0)	(18.1)	9.1	(42.8)
Total other comprehensive income (loss)	36.8	40.1	(3.8)	81.7
Comprehensive income	$ 1,072.1	$ 970.6	$ 2,647.0	$ 2,584.8