Income Taxes - Components of Income Tax Expense (Benefit) from Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components Of Income Tax Expense Benefit Continuing Operations [Abstract]
U.S. Federal, Current	$ 23.9	$ 33.5	$ 21.1
U.S. State and Local, Current	10.8	14.7	10.0
Foreign, Current	2.6	4.0	3.7
Current income tax expense	37.3	52.2	34.8
U.S. Federal, Deferred	(0.6)	1.2	(20.9)
U.S. State and Local, Deferred	(0.3)	0.4	(6.4)
Foreign, Deferred	(0.2)	(1.9)	0.9
Deferred income tax (benefit) expense	(0.5)	(0.3)	(26.4)
Total income tax expense	$ 36.8	$ 51.9	$ 8.4