Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (3,593.6)	$ 915.7	$ (2,494.0)	$ 1,615.5
Other comprehensive income (loss):
Unrealized holding losses on available-for-sale debt securities, net of tax of $1.5, $4.3, $6.9 and $3.5, respectively	(5.4)	(15.5)	(25.1)	(12.6)
Unrealized gains (losses) on foreign currency forward contracts, net of tax of $(3.2), $4.2, $(15.5) and $11.6, respectively	11.8	(15.3)	56.3	(42.1)
Foreign currency translation adjustment	(1.2)	4.1	5.6	14.1
Total other comprehensive income (loss)	5.2	(26.7)	36.8	(40.6)
Comprehensive (loss) income	$ (3,588.4)	$ 889.0	$ (2,457.2)	$ 1,574.9