Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current
U.S. Federal	$ (3.2)	$ (15.3)	$ 9.6
Foreign	0.2	0.2	0.9
State	1.0	0.1	4.7
Total current	(2.0)	(15.0)	15.2
Deferred
U.S. Federal	9.7	(40.7)	2.9
Foreign	0.1		(0.1)
State	2.7	(11.8)	1.4
Total deferred	12.5	(52.5)	4.2
Income tax expense (benefit)	$ 10.5	$ (67.5)	$ 19.4