Income Taxes - Schedule of Reconciliation of Income Taxes Expense (Benefit) to Statutory Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Amount
Income tax expense (benefit) based on the U.S. statutory tax rate	$ 127.9	$ 136.8	$ 154.2
Tax Credits	(8.0)
Nontaxable and nondeductible items	2.0
Federal credits		(2.5)	(2.6)
Other reconciling items	0.2	(2.5)	1.0
Domestic state and local income taxes, net of federal effect	16.5	17.3	25.0
Income tax expense (benefit)	$ 138.6	$ 149.1	$ 177.6
Percent
Income tax expense (benefit) based on the U.S. statutory tax rate	21.00%
Tax Credits	(1.30%)
Nontaxable and nondeductible items	0.30%
Other reconciling items	0.00%
Domestic state and local income taxes, net of federal effect	2.80%
Total income tax expense (benefit)	22.80%
Tax Jurisdiction of Domicile [Extensible Enumeration]	UNITED STATES	UNITED STATES	UNITED STATES