Fair Value of Financial Instruments - Schedule of Marketable Securities (Details) - Fair Value, Recurring - Marketable securities - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 127.3	$ 186.9
Change in fair value measurement	(14.1)	(53.4)
Foreign currency translation adjustment	(2.8)	(7.7)
Dividend reinvestment, net of tax	0.0	1.5
Ending Balance	$ 110.4	$ 127.3