Notes and Other Debt, Net - Asset-Backed Notes and Bridge Loan Facility (Details) - USD ($) $ in Millions	Dec. 31, 2025	Oct. 24, 2025	Feb. 03, 2025	Dec. 31, 2024	Feb. 23, 2024
Debt Instrument [Line Items]
Notes and other debt, net	$ 9,540.5			$ 5,861.5
ABS Bridge Loan Facility
Debt Instrument [Line Items]
Notes and other debt, net	0.0	$ 250.0	$ 589.0	275.0
ABS Notes (Class A-2) - 5.877%, due April 1, 2030 (discount based on imputed interest rate of 6.36%)
Debt Instrument [Line Items]
Notes and other debt, net	$ 426.0		426.0	0.0
Issuance senior notes, stated percentage	5.877%
6.369% ABS Notes (Class B) due 2030
Debt Instrument [Line Items]
Notes and other debt, net	$ 65.0		65.0	0.0
Issuance senior notes, stated percentage	6.369%
9.018% ABS Notes (Class C) Due 2030
Debt Instrument [Line Items]
Notes and other debt, net	$ 98.0		$ 98.0	0.0
Issuance senior notes, stated percentage	9.018%
5.177% ABS-2 Notes (Class A) Due 2031
Debt Instrument [Line Items]
Notes and other debt, net	$ 180.0	180.0		0.0
Issuance senior notes, stated percentage	5.177%
ABS-2 Notes (Class B) - 5.621% due 2031
Debt Instrument [Line Items]
Notes and other debt, net	$ 28.2	28.2		0.0
Issuance senior notes, stated percentage	5.621%
ABS-2 Notes (Class C) - 7.834% due 2031
Debt Instrument [Line Items]
Notes and other debt, net	$ 41.8	41.8		$ 0.0
Issuance senior notes, stated percentage	7.834%
Class A-1 Variable Funding Notes
Debt Instrument [Line Items]
Notes and other debt, net		$ 75.0
Revolving Credit Facility | ABS Credit Agreement | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity					$ 350.0