Income Taxes - Components of Consolidated Income Tax Provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current income tax provision -
U.S. federal	$ 218.9	$ 199.4	$ 187.3
State and local	44.6	44.3	61.7
Total current provision for taxes	263.5	243.7	249.0
Deferred income tax provision (benefit) -
U.S. federal	(5.5)	3.6	86.9
State and local	1.3	1.6	(0.7)
Foreign	0.0	0.0	(0.2)
Total deferred provision (benefit) for taxes	(4.2)	5.2	86.0
Total provision for taxes	$ 259.3	$ 248.9	$ 335.0