Income Taxes - Schedule of Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current:
Federal	$ 45.2	$ 39.4	$ 42.4
State	14.4	11.3	12.3
Total current	59.6	50.7	54.7
Deferred:
Federal	(3.7)	3.7	(5.7)
State	(1.0)	1.3	(0.9)
Total deferred	(4.7)	5.0	(6.6)
Total income tax expense	54.9	55.7	48.1
Operating Loss Carryforwards [Line Items]
Deficiency (benefit) of stock-based compensation plans	0.2	(0.5)	(0.4)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount	$ 2.0	$ 0.8	$ 0.0