Leases - Summary of Components of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Leases [Abstract]
Operating lease expense	$ 4.3	$ 4.8	$ 8.8	$ 9.7
Sublease income	(1.0)	(1.1)	(2.1)	(2.2)
Net operating lease expense	3.3	3.7	6.7	7.5
Amortization of ROU asset	0.5	0.0	0.9	0.0
Interest on lease liability	0.0	0.0	0.1	0.0
Total finance lease expense	$ 0.5	$ 0.0	$ 1.0	$ 0.0