Income Taxes - Pre-tax Income and Provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Continuing operations:
U.S. domestic	$ 924.1	$ 1,099.5	$ 465.2
Foreign	6.3	24.2	24.7
Income from continuing operations before income taxes	930.4	1,123.7	489.9
Discontinued operations:
U.S. domestic	(121.9)	(9.3)	(165.1)
Foreign	143.6	75.9	167.6
Income before income taxes	21.7	66.6	2.5
Total income before income taxes	952.1	1,190.3	492.4
Current provision:
Federal and state	235.2	280.1	99.8
Foreign	4.5	8.4	7.4
Total current provision	239.7	288.5	107.2
Deferred (benefit) provision:
Federal and state	(20.2)	(19.1)	0.4
Foreign	(8.0)	(3.7)	(3.3)
Total deferred (benefit) provision	(28.2)	(22.8)	(2.9)
Total provision for income taxes	211.5	265.7	104.3
Reconciliation of taxes from continuing operations
Taxes at U.S. statutory rate	195.4	236.0	102.9
State and local taxes, net of federal income tax benefit	31.4	39.5	16.1
Equity compensation windfall	(3.3)	(4.6)	(10.8)
Change in unrecognized tax benefit	(2.3)	(1.9)	(7.5)
Other, net	(9.7)	(3.3)	3.6
Total provision for income taxes	$ 211.5	$ 265.7	$ 104.3
Effective income tax rate on continuing operations (as a percent)	22.70%	23.60%	21.30%
Income Taxes Paid, Net [Abstract]
Cash payments for income taxes, net of refunds	$ 247.7	$ 295.8	$ 132.8