Income Taxes - Components of Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current tax expense (benefit):
Federal	$ 14.7	$ 16.4	$ 20.7
Foreign	5.0	1.4	0.4
State and local	4.0	5.1	6.0
Total current tax expense	23.7	22.9	27.1
Deferred tax expense (benefit):
Federal	0.4	2.7	2.8
Foreign	1.5	3.1	2.2
State and local	(8.6)	(0.2)	(1.9)
Deferred tax expense (benefit)	(6.7)	5.6	3.1
Total income tax expense	$ 17.0	$ 28.5	$ 30.2