Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Allowance for credit losses	$ 128.3	$ 110.1
Stock-based compensation	15.5	16.5
Deferred state net operating loss	3.6	4.3
Other, net	13.2	7.0
Total deferred tax assets	160.6	137.9
Valuation of Loans receivable	471.3	363.9
Deferred Loan origination costs	1.6	1.5
Other, net	10.2	9.2
Total deferred tax liabilities	483.1	374.6
Deferred income taxes, net	$ 322.5	$ 236.7