Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
income (loss)	$ 3,953.2	$ (535.6)	$ 3,619.6
Other comprehensive (loss) income:
Unrealized holding gains (losses) on available-for-sale debt securities, net of tax of $(7.6), $0.6 and $(2.7), respectively	26.9	(2.5)	9.7
Unrealized (losses) gains on foreign currency forward contracts, net of tax of $56.0, $(38.2) and $14.0, respectively	(198.1)	136.0	(50.9)
Foreign currency translation adjustment	27.5	8.6	26.1
Total other comprehensive (loss) income	(143.7)	142.1	(15.1)
Comprehensive income (loss)	$ 3,809.5	$ (393.5)	$ 3,604.5