Debt (Schedule Of Outstanding Term ABS Financings) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)
Term ABS 2019-1 [Member]
Debt Instrument [Line Items]
Debt financing close date	Feb. 21, 2019
Net Book Value Of Loans Pledged As Collateral	$ 503.1
Term ABS 2019-2 [Member]
Debt Instrument [Line Items]
Debt financing close date	Aug. 28, 2019
Net Book Value Of Loans Pledged As Collateral	$ 625.1
Term ABS 2019-3 [Member]
Debt Instrument [Line Items]
Debt financing close date	Nov. 21, 2019
Net Book Value Of Loans Pledged As Collateral	$ 439.6
Term ABS 2020-1 [Member]
Debt Instrument [Line Items]
Debt financing close date	Feb. 20, 2020
Net Book Value Of Loans Pledged As Collateral	$ 625.1
Term ABS 2020-2 [Member]
Debt Instrument [Line Items]
Debt financing close date	Jul. 23, 2020
Net Book Value Of Loans Pledged As Collateral	$ 602.3
Term ABS 2020-3 [Member]
Debt Instrument [Line Items]
Debt financing close date	Oct. 22, 2020
Net Book Value Of Loans Pledged As Collateral	$ 750.1
Term ABS 2021-1 [Member]
Debt Instrument [Line Items]
Debt financing close date	Jan. 29, 2021
Net Book Value Of Loans Pledged As Collateral	$ 125.1
Term ABS 2021-2 [Member]
Debt Instrument [Line Items]
Debt financing close date	Feb. 18, 2021
Net Book Value Of Loans Pledged As Collateral	$ 625.1
Term ABS 2021-3 [Member]
Debt Instrument [Line Items]
Debt financing close date	May 20, 2021
Net Book Value Of Loans Pledged As Collateral	$ 562.6
Term ABS 2021-4 [Member]
Debt Instrument [Line Items]
Debt financing close date	Oct. 28, 2021
Net Book Value Of Loans Pledged As Collateral	$ 312.6