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, 2021	Dec. 31, 2020
Carrying Amount [Member]
Assets, Fair Value Disclosure [Abstract]
Cash and cash equivalents		$ 23.3	$ 16.0
Restricted cash and cash equivalents		410.9	380.2
Debt Securities, Available-for-sale, Restricted		62.1	66.1
Net investment in Loans receivable		6,336.3	6,787.9
Liabilities, Fair Value Disclosure [Abstract]
Revolving secured line of credit		2.6	95.9
Secured financing		3,811.5	3,711.6
Senior notes		792.5	790.6
Other Borrowings		9.7	10.5
Estimated Fair Value [Member]
Assets, Fair Value Disclosure [Abstract]
Cash and cash equivalents		23.3	16.0
Restricted cash and cash equivalents		410.9	380.2
Debt Securities, Available-for-sale, Restricted		62.1	66.1
Net investment in Loans receivable		6,580.4	7,216.4
Liabilities, Fair Value Disclosure [Abstract]
Revolving secured line of credit		2.6	95.9
Secured financing		3,832.1	3,793.9
Senior notes		825.8	842.0
Other Borrowings		9.7	10.5
Cash and cash equivalents	[1]	23.3	16.0
Restricted cash and cash equivalents	[1]	410.9	380.2
Debt Securities, Available-for-sale, Restricted	[2]	62.1	66.1
Net investment in Loans receivable	[1]	6,580.4	7,216.4
Revolving secured line of credit	[1]	2.6	95.9
Secured financing	[1]	3,832.1	3,793.9
Senior notes	[1]	825.8	842.0
Other Borrowings	[1]	$ 9.7	$ 10.5

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

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