Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Allowance for credit losses	$ 741.2	$ 693.5
Stock-based compensation	14.6	18.3
Deferred state net operating loss	13.7	4.7
Other, net	14.1	12.2
Total deferred tax assets	783.6	728.7
Valuation of Loans receivable	1,158.9	1,140.4
Deferred Loan origination costs	1.6	1.6
Other, net	12.3	13.4
Total deferred tax liabilities	1,172.8	1,155.4
Net deferred tax liability	$ 389.2	$ 426.7