Other Financial Information - Other Expense, Net (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Other Financial Information [Abstract]
Interest income		$ 14.1	$ 5.5	$ 35.3	$ 11.4
Interest expense		(20.5)	(15.2)	(59.4)	(41.1)
Gain (loss) on other investments, net		0.4	(1.2)	2.3	(10.2)
Other		1.2	1.9	0.8	4.0
Other expense, net	[1]	$ (4.8)	$ (9.0)	$ (21.0)	$ (35.9)

[1] The prior period amounts have been reclassified to conform to the current period presentation