Income Taxes Components of Income Tax Provision From Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current:
Federal	$ 368.7	$ 374.2	$ 168.9
State	87.4	78.5	37.4
Federal and state deferred	0.8	(17.2)	(39.0)
Change in valuation allowance, net	0.2	(0.2)	0.3
Adjustments and settlements	(1.3)	(0.2)	0.7
Income tax provision	$ 455.8	$ 435.1	$ 168.3