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Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 576.2	$ 541.5	$ 341.2
Other comprehensive income (loss), net of tax:
Translation adjustments and other	8.6	(9.2)	(9.8)
Unrealized gain (loss) on marketable debt securities	0.1	4.1	(2.3)
Total other comprehensive income (loss), net of tax	8.7	(5.1)	(12.1)
Comprehensive income	$ 584.9	$ 536.4	$ 329.1

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