Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 1,032.9	$ (3,593.6)	$ 1,679.2	$ (2,494.0)
Other comprehensive (loss) income:
Unrealized holding gains (losses) on available-for-sale debt securities, net of tax of $(2.1), $1.5, $(6.7) and $6.9, respectively	7.4	(5.4)	23.9	(25.1)
Unrealized (losses) gains on foreign currency forward contracts, net of tax of $54.1, $(3.2), $79.7 and $(15.5), respectively	(191.9)	11.8	(282.2)	56.3
Foreign currency translation adjustment	15.3	(1.2)	29.4	5.6
Total other comprehensive (loss) income	(169.2)	5.2	(228.9)	36.8
Comprehensive income (loss)	$ 863.7	$ (3,588.4)	$ 1,450.3	$ (2,457.2)