Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (31.1)	$ 20.4
Available-for-sale debt securities:
Change in net unrealized gains, net	(1.2)	(3.0)
Net realized gains and losses reclassified into net income, net	(0.8)	0.5
Net change on available-for-sale debt securities, net	(2.0)	(2.5)
Cash flow hedges:
Change in net unrealized gains and (losses), net of tax (provision) benefit of $(14.5) and $4.2, respectively	38.5	(24.9)
Net realized losses reclassified into net income, net	(8.9)	1.4
Net change on cash flow hedges, net	29.6	(23.5)
Change in foreign currency translation adjustments	(1.9)	(14.7)
Other comprehensive income (loss), net	25.7	(40.7)
Comprehensive loss	$ (5.4)	$ (20.3)