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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 132.3	$ 69.0
Other comprehensive income:
Change in foreign currency translation adjustments	(1.1)	(0.7)
Change in net unrealized gains and losses on short-term investments	2.2	10.3
Total other comprehensive income	1.1	9.6
Comprehensive income	$ 133.4	$ 78.6

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