Leases - Components of Lease Expense (Includes Related Party Leases) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Lease, Cost [Abstract]
Operating lease expense	$ 6.3	$ 5.9	$ 12.3	$ 11.7
Short-term lease expense	0.7	0.7	1.7	2.4
Low-value lease expense	0.1	0.2	0.1	0.4
Variable lease expense	1.5	0.1	2.7	0.1
Finance lease expense:
Amortization of right-of-use assets	0.9	0.5	1.7	0.7
Interest on lease liabilities	0.2	0.1	0.4	0.2
Sublease income	(0.1)		(0.1)
Total lease expense	$ 9.6	$ 7.5	$ 18.8	$ 15.5