Debt (Summary of Term ABS Financings) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Term ABS 2019-2 [Member]
Debt Instrument [Line Items]
Close Date	Aug. 28, 2019
Net Book Value of Loans Contributed at Closing	$ 625.1
Maturity Date	Aug. 15, 2025	[1],[2]
Term ABS 2021-1 [Member]
Debt Instrument [Line Items]
Close Date	Jan. 29, 2021
Net Book Value of Loans Contributed at Closing	$ 125.1
Maturity Date	Feb. 17, 2026	[1],[2]
Term ABS 2021-2 [Member]
Debt Instrument [Line Items]
Close Date	Feb. 18, 2021
Net Book Value of Loans Contributed at Closing	$ 625.1
Maturity Date	Feb. 15, 2023	[1],[3]
Term ABS 2021-3 [Member]
Debt Instrument [Line Items]
Close Date	May 20, 2021
Net Book Value of Loans Contributed at Closing	$ 562.6
Maturity Date	May 15, 2023	[1],[3]
Term ABS 2021-4 [Member]
Debt Instrument [Line Items]
Close Date	Oct. 28, 2021
Net Book Value of Loans Contributed at Closing	$ 312.6
Maturity Date	Oct. 16, 2023	[1],[3]
Term ABS 2022-1 [Member]
Debt Instrument [Line Items]
Close Date	Jun. 16, 2022
Net Book Value of Loans Contributed at Closing	$ 437.6
Maturity Date	Jun. 17, 2024	[1],[3]
Term ABS 2022-2 [Member]
Debt Instrument [Line Items]
Close Date	Dec. 15, 2022
Net Book Value of Loans Contributed at Closing	$ 250.1
Maturity Date	Dec. 15, 2025	[1],[2]
Term ABS 2022-3 [Member]
Debt Instrument [Line Items]
Close Date	Nov. 03, 2022
Net Book Value of Loans Contributed at Closing	$ 500.1
Maturity Date	Oct. 15, 2024	[1],[3]
Term ABS 2023-1 [Member]
Debt Instrument [Line Items]
Close Date	Mar. 16, 2023
Net Book Value of Loans Contributed at Closing	$ 500.2
Maturity Date	Mar. 17, 2025	[1],[3]
Term ABS 2023-2 [Member]
Debt Instrument [Line Items]
Close Date	May 25, 2023
Net Book Value of Loans Contributed at Closing	$ 500.1
Maturity Date	May 15, 2025
Term ABS 2023-3 [Member]
Debt Instrument [Line Items]
Close Date	Aug. 24, 2023
Net Book Value of Loans Contributed at Closing	$ 500.1
Maturity Date	Aug. 15, 2025
Term ABS 2023-A [Member]
Debt Instrument [Line Items]
Close Date	Nov. 30, 2023
Net Book Value of Loans Contributed at Closing	$ 252.0
Maturity Date	Dec. 15, 2025
Term ABS 2023-5 [Member]
Debt Instrument [Line Items]
Close Date	Dec. 21, 2023
Net Book Value of Loans Contributed at Closing	$ 375.1
Maturity Date	Dec. 15, 2025
Term ABS 2024-A [Member]
Debt Instrument [Line Items]
Close Date	Feb. 27, 2024
Net Book Value of Loans Contributed at Closing	$ 250.1
Maturity Date	Feb. 15, 2027
Term ABS 2024-1 [Member]
Debt Instrument [Line Items]
Close Date	Mar. 28, 2024
Net Book Value of Loans Contributed at Closing	$ 625.2
Maturity Date	Mar. 16, 2026

[1] Financing made available only to a specified subsidiary of the Company.

[2] Represents the revolving maturity date. The Company has the option to redeem and retire the indebtedness after the revolving maturity date. If we do not elect this option, the outstanding balance will amortize based on the cash flows of the pledged assets

[3] Represents the revolving maturity date. The outstanding balance will amortize after the revolving maturity date based on the cash flows of the pledged assets.