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Segment Information - Other Segment Items (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Gain on intellectual property matters	$ 1.4	$ 1.1	$ 9.0	$ 3.4
Interest income	40.7	42.4	130.0	112.9
Other income—net	13.0	118.1	58.0	113.0
Income (loss) from equity method investment	(0.2)	(5.3)	10.3	(23.9)
Reportable Segment
Segment Reporting Information [Line Items]
Gain on intellectual property matters	1.4	1.1	9.0	3.4
Interest income	40.7	42.4	130.0	112.9
Interest expense	(6.2)	(5.0)	(15.7)	(15.1)
Other income—net	13.0	118.1	58.0	113.0
Income (loss) from equity method investment	(0.2)	(5.3)	10.3	(23.9)
Other segment items	$ 48.7	$ 151.3	$ 191.6	$ 190.3

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