Other Financial Information - Other Expense, Net (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other Financial Information [Abstract]
Interest income		$ 50.6	$ 19.6	$ 14.9
Interest expense		(80.0)	(58.6)	(50.8)
Gain (loss) on other investments, net		6.0	(11.6)	4.9
Other		(0.4)	1.6	1.5
Other expense, net	[1]	$ (23.8)	$ (49.0)	$ (29.5)

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