Income Taxes - Schedule of Components of Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current provision (benefit):
Federal	$ 66.1	$ (38.7)	$ 19.2
State and local	18.5	3.0	6.0
Foreign	0.1	0.1	0.0
Current (benefit) provision	84.7	(35.6)	25.2
Deferred provision:
Federal	7.5	28.7	16.1
State and local	2.3	1.5	15.5
Foreign	0.0	0.1	0.0
Deferred provision	9.8	30.3	31.6
Income tax provision (benefit)	$ 94.5	$ (5.3)	$ 56.8