Outstanding Loans and Security Agreements - Recourse Debt Facilities Narrative (Details) - Senior Secured Notes - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Aug. 31, 2020
3% Green Convertible Senior Notes due June 2028
Debt Instrument [Line Items]
Interest rate percentage	3.00%		3.00%
Interest expense	$ 5.7	$ 0.0
Debt instrument, unamortized discount	4.7
Other issuance costs	1.0
Unamortized debt issuance costs	$ 16.3		$ 17.3
2.5% Green Convertible Senior Notes due August 2025
Debt Instrument [Line Items]
Interest rate percentage	2.50%		2.50%	2.50%
Interest expense	$ 1.9	1.9
Debt instrument, unamortized discount	1.4	1.4
Unamortized debt issuance costs	2.7		$ 3.2
Amortization of issuance costs	$ 0.5	$ 0.5