Fair Value Of Financial Instruments (Schedule Of Assets And Liabilities, Measured At Fair Value) (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	[1]	$ 187.4	$ 25.7
Restricted cash and cash equivalents	[1]	330.3	303.6
Restricted securities available for sale	[2]	59.3	58.6
Net investment in Loans receivable	[1]	6,777.2	5,855.1
Revolving secured line of credit	[1]	0.0	171.9
Secured financing	[1]	3,397.5	3,100.9
Senior notes	[1]	1,257.6	556.3
Other Borrowings	[1]	11.3	11.9
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	[1]	187.4	25.7
Restricted cash and cash equivalents	[1]	330.3	303.6
Restricted securities available for sale	[2]	47.5	47.9
Net investment in Loans receivable	[1]	0.0	0.0
Revolving secured line of credit	[1]	0.0	0.0
Secured financing	[1]	0.0	0.0
Senior notes	[1]	1,257.6	556.3
Other Borrowings	[1]	0.0	0.0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	[1]	0.0	0.0
Restricted cash and cash equivalents	[1]	0.0	0.0
Restricted securities available for sale	[2]	11.8	10.7
Net investment in Loans receivable	[1]	0.0	0.0
Revolving secured line of credit	[1]	0.0	171.9
Secured financing	[1]	3,397.5	3,100.9
Senior notes	[1]	0.0	0.0
Other Borrowings	[1]	11.3	11.9
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	[1]	0.0	0.0
Restricted cash and cash equivalents	[1]	0.0	0.0
Restricted securities available for sale	[2]	0.0	0.0
Net investment in Loans receivable	[1]	6,777.2	5,855.1
Revolving secured line of credit	[1]	0.0	0.0
Secured financing	[1]	0.0	0.0
Senior notes	[1]	0.0	0.0
Other Borrowings	[1]	$ 0.0	$ 0.0

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

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