Leases - Components of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Leases [Abstract]
Operating lease cost	$ 7.2	$ 7.1	$ 14.6	$ 14.1
Sublease income	(0.7)	(0.7)	(1.6)	(1.3)
Total lease cost	$ 6.5	$ 6.4	$ 13.0	$ 12.8