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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 150.3	$ 132.3
Other comprehensive income:
Change in foreign currency translation adjustments	1.0	(1.1)
Change in net unrealized gains and losses on short-term investments	2.1	2.2
Total other comprehensive income	3.1	1.1
Comprehensive income	$ 153.4	$ 133.4

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