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Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 541.5	$ 341.2	$ 216.9
Other comprehensive loss, net of tax:
Translation adjustments and other	(9.2)	(9.8)	(1.0)
Unrealized gain (loss) on marketable debt securities	4.1	(2.3)	(1.7)
Total other comprehensive loss, net of tax	(5.1)	(12.1)	(2.7)
Comprehensive income	$ 536.4	$ 329.1	$ 214.2

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