v3.26.1
Debt (Non-Recourse Debt) (Details)
$ in Millions
Jun. 30, 2026
USD ($)
numberOfAgreement
Jun. 17, 2026
USD ($)
Jan. 29, 2026
USD ($)
Dec. 31, 2025
USD ($)
May 21, 2025
USD ($)
Debt Instrument [Line Items]          
Number of warehouse facility agreements | numberOfAgreement 3        
Auto loans receivable $ 2,667.6     $ 2,209.9  
Variable Interest Entity, Primary Beneficiary | Asset Pledged as Collateral          
Debt Instrument [Line Items]          
Restricted cash of consolidated VIEs 75.6     25.5  
Auto loans receivable 1,600.0     551.1  
Non-recourse          
Debt Instrument [Line Items]          
Non-recourse debt 2,424.1     1,947.3  
Less: unamortized debt discounts and debt issuance costs (6.9)     (2.7)  
Less: current maturities (83.3)     (63.8)  
Non-recourse debt, net of current maturities 2,333.9     1,880.8  
Non-recourse | Warehouse facilities          
Debt Instrument [Line Items]          
Aggregate capacity 1,400.0        
Unused capacity 596.5        
Remaining borrowing capacity 0.8        
Non-recourse | Warehouse facilities | Line of Credit          
Debt Instrument [Line Items]          
Non-recourse debt $ 803.5     $ 1,398.7  
Weighted-average annual interest rate 4.50%     4.70%  
Non-recourse | Warehouse Facility, August 2026 expiration          
Debt Instrument [Line Items]          
Aggregate capacity $ 400.0        
Non-recourse | Warehouse facility, October 2026 expiration          
Debt Instrument [Line Items]          
Aggregate capacity 300.0        
Non-recourse | Warehouse Facility, December 2026 expiration          
Debt Instrument [Line Items]          
Aggregate capacity 700.0        
Non-recourse | Term securitization debt | Variable Interest Entity, Primary Beneficiary | Notes Payable, Other Payables          
Debt Instrument [Line Items]          
Non-recourse debt 1,620.6     $ 548.6  
Initial principal amount 1,999.2        
Non-recourse | ANF Auto Receivables Trust 2025-1 | Variable Interest Entity, Primary Beneficiary | Notes Payable, Other Payables          
Debt Instrument [Line Items]          
Non-recourse debt $ 437.3        
Initial principal amount         $ 700.0
Non-recourse | ANF Auto Receivables Trust 2025-1 | Variable Interest Entity, Primary Beneficiary | Minimum | Notes Payable, Other Payables          
Debt Instrument [Line Items]          
Percentage interest 4.62%        
Non-recourse | ANF Auto Receivables Trust 2025-1 | Variable Interest Entity, Primary Beneficiary | Maximum | Notes Payable, Other Payables          
Debt Instrument [Line Items]          
Percentage interest 5.63%        
Non-recourse | ANF Auto Receivables Trust 2026-1 | Variable Interest Entity, Primary Beneficiary | Notes Payable, Other Payables          
Debt Instrument [Line Items]          
Non-recourse debt $ 633.3        
Initial principal amount     $ 749.2    
Non-recourse | ANF Auto Receivables Trust 2026-1 | Variable Interest Entity, Primary Beneficiary | Minimum | Notes Payable, Other Payables          
Debt Instrument [Line Items]          
Percentage interest 3.95%        
Non-recourse | ANF Auto Receivables Trust 2026-1 | Variable Interest Entity, Primary Beneficiary | Maximum | Notes Payable, Other Payables          
Debt Instrument [Line Items]          
Percentage interest 5.07%        
Non-recourse | ANF Auto Receivables Trust 2026-2 | Variable Interest Entity, Primary Beneficiary | Notes Payable, Other Payables          
Debt Instrument [Line Items]          
Non-recourse debt $ 550.0        
Initial principal amount   $ 550.0      
Non-recourse | ANF Auto Receivables Trust 2026-2 | Variable Interest Entity, Primary Beneficiary | Minimum | Notes Payable, Other Payables          
Debt Instrument [Line Items]          
Percentage interest 3.96%        
Non-recourse | ANF Auto Receivables Trust 2026-2 | Variable Interest Entity, Primary Beneficiary | Maximum | Notes Payable, Other Payables          
Debt Instrument [Line Items]          
Percentage interest 5.75%