Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 85.4	$ 55.7
Available-for-sale debt securities:
Change in net unrealized gains and losses	2.1	(5.7)
Net realized losses reclassified into net income	0.0	0.1
Net change on available-for-sale debt securities	2.1	(5.6)
Cash flow hedges:
Change in net unrealized gains and losses	(6.9)	20.8
Net realized losses reclassified into net income	7.4	0.1
Net change on cash flow hedges	0.5	20.9
Change in foreign currency translation adjustments	1.5	(1.5)
Other comprehensive income, net	4.1	13.8
Comprehensive income	$ 89.5	$ 69.5