v3.26.1
FLOORPLAN NOTES PAYABLE - Narrative (Details)
3 Months Ended
Mar. 31, 2026
USD ($)
institution
tranche
Dec. 31, 2025
USD ($)
May 30, 2025
USD ($)
Line of Credit      
Line of Credit Facility      
Participating financial institutions (institution) | institution 18    
Outstanding letters of credit $ 12,300,000 $ 11,800,000  
Revolving Credit Facility      
Line of Credit Facility      
Unamortized discount 7,500,000 $ 8,000,000.0  
Revolving Credit Facility | Line of Credit      
Line of Credit Facility      
Unsecured bridge loan $ 3,500,000,000   $ 3,500,000,000
Line of credit facility, potential maximum borrowing capacity     $ 4,500,000,000
Number of tranches (tranche) | tranche 2    
Floorplan Line | Line of Credit      
Line of Credit Facility      
Unsecured bridge loan $ 1,750,000,000    
Weighted average interest rate (as a percentage) 4.91%    
Commitment fee (as a percentage) 0.15%    
Acquisition Line | Line of Credit      
Line of Credit Facility      
Unsecured bridge loan $ 1,750,000,000    
Sub-limit for letters of credit $ 100,000,000.0    
Acquisition Line | Line of Credit | Minimum      
Line of Credit Facility      
Commitment fee (as a percentage) 0.15%    
Acquisition Line | Line of Credit | Minimum | Secured Overnight Financing Rate (SOFR)      
Line of Credit Facility      
Basis spread on variable rate (as a percentage) 1.10%    
Acquisition Line | Line of Credit | Maximum      
Line of Credit Facility      
Commitment fee (as a percentage) 0.40%    
Acquisition Line | Line of Credit | Maximum | Secured Overnight Financing Rate (SOFR)      
Line of Credit Facility      
Basis spread on variable rate (as a percentage) 2.10%    
New Vehicles | Line of Credit | Secured Overnight Financing Rate (SOFR)      
Line of Credit Facility      
Basis spread on variable rate (as a percentage) 1.20%    
Used Vehicles | Line of Credit | Secured Overnight Financing Rate (SOFR)      
Line of Credit Facility      
Basis spread on variable rate (as a percentage) 1.50%    
FMCC Facility, net | Line of Credit      
Line of Credit Facility      
Unsecured bridge loan $ 200,000,000.0    
Interest rate (as a percentage) 6.75%    
GM Facility, net | Line of Credit      
Line of Credit Facility      
Unsecured bridge loan $ 376,700,000    
GM Facility, net | Line of Credit | Prime Rate      
Line of Credit Facility      
Basis spread on variable rate (as a percentage) 1.00%    
Other Credit Facilities | Line of Credit      
Line of Credit Facility      
Outstanding balance $ 457,800,000    
Rental Vehicles Financed through Credit Facility | Line of Credit      
Line of Credit Facility      
Outstanding balance $ 190,000,000.0    
Rental Vehicles Financed through Credit Facility | Line of Credit | Minimum      
Line of Credit Facility      
Interest rate (as a percentage) 1.00%    
Rental Vehicles Financed through Credit Facility | Line of Credit | Maximum      
Line of Credit Facility      
Interest rate (as a percentage) 8.00%    
UK Credit Facilities | Line of Credit      
Line of Credit Facility      
Outstanding balance $ 267,900,000