Leases - Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 31.5	$ 29.5	$ 23.0
Variable lease cost	2.3	1.9	2.3
Total lease expense	$ 33.8	$ 31.4	$ 25.3