Income Taxes - Components of Consolidated Income Tax Provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current income tax provision -
U.S. federal	$ 187.3	$ 158.0	$ 109.4
State and local	61.7	50.1	27.5
Foreign	0.0	0.1	0.1
Total current provision for taxes	249.0	208.2	137.0
Deferred income tax provision (benefit) -
U.S. federal	86.9	62.1	26.8
State and local	(0.7)	(2.6)	8.0
Foreign	(0.2)	(0.1)	(0.1)
Total deferred provision for taxes	86.0	59.4	34.7
Total provision for taxes	$ 335.0	$ 267.6	$ 171.7