Fair Value Of Financial Instruments (Schedule Of Comparison Of The Carrying Value And Estimated Fair Value Of These Financial Instruments) (Details) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021
Carrying Amount [Member]
Assets, Fair Value Disclosure [Abstract]
Cash and cash equivalents		$ 7.7	$ 23.3
Restricted cash and cash equivalents		410.0	410.9
Debt Securities, Available-for-sale, Restricted		72.3	62.1
Net investment in Loans receivable		6,297.7	6,336.3
Liabilities, Fair Value Disclosure [Abstract]
Revolving secured line of credit		30.9	2.6
Secured financing		3,756.4	3,811.5
Senior notes		794.5	792.5
Other Borrowings		8.9	9.7
Estimated Fair Value [Member]
Assets, Fair Value Disclosure [Abstract]
Cash and cash equivalents		7.7	23.3
Restricted cash and cash equivalents		410.0	410.9
Debt Securities, Available-for-sale, Restricted		72.3	62.1
Net investment in Loans receivable		6,767.9	6,580.4
Liabilities, Fair Value Disclosure [Abstract]
Revolving secured line of credit		30.9	2.6
Secured financing		3,581.9	3,832.1
Senior notes		759.0	825.8
Other Borrowings		8.9	9.7
Cash and cash equivalents	[1]	7.7	23.3
Restricted cash and cash equivalents	[1]	410.0	410.9
Debt Securities, Available-for-sale, Restricted	[2]	72.3	62.1
Net investment in Loans receivable	[1]	6,767.9	6,580.4
Revolving secured line of credit	[1]	30.9	2.6
Secured financing	[1]	3,581.9	3,832.1
Senior notes	[1]	759.0	825.8
Other Borrowings	[1]	$ 8.9	$ 9.7

[1] Measured at amortized cost with fair value disclosed.

[2] Measured at fair value on a recurring basis.