v3.26.1
Auto Loan Receivables (Allowance for Loan Losses) (Details) - USD ($)
 12 Months Ended
Feb. 28, 2026
Feb. 28, 2025
Feb. 29, 2024
Financing Receivable, Allowance for Credit Loss [Line Items]      
Financing Receivable, Allowance for Credit Loss $ 453,027,000 $ 458,730,000 $ 482,800,000
Financing Receivable, Allowance for Credit Loss, Writeoff (636,100,000) (589,200,000)  
Provision for loan losses (4) (5) 391,200,000 334,700,000 $ 310,500,000
Recoveries (3) 239,200,000 $ 230,400,000  
Item As Percent Of Total Ending Managed Receivables, Period Increase (Decrease) 17    
Auto loans held for investment      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Provision for loan losses (4) (5) 433,400,000    
Transfer of auto loans to held for sale      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Provision for loan losses (4) (5) $ (42,200,000)    
Allowance For Loan Losses      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Item as percent of total ending managed receivables 2.78% 2.61% 2.78%
Tier 1 managed receivables      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Financing Receivable, Allowance for Credit Loss $ 377,700,000 $ 378,100,000 $ 389,700,000
Financing Receivable, Allowance for Credit Loss, Writeoff (540,800,000) (494,700,000)  
Provision for loan losses (4) (5) 362,500,000 281,600,000  
Recoveries (3) 208,200,000 201,500,000  
Tier 1 managed receivables | Auto loans held for investment      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Provision for loan losses (4) (5) (30,300,000)    
Tier 2 & Tier 3 managed receivables      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Financing Receivable, Allowance for Credit Loss 75,300,000 80,600,000 $ 93,100,000
Financing Receivable, Allowance for Credit Loss, Writeoff (95,300,000) (94,500,000)  
Provision for loan losses (4) (5) 70,900,000 53,100,000  
Recoveries (3) 31,000,000.0 $ 28,900,000  
Tier 2 & Tier 3 managed receivables | Auto loans held for investment      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Provision for loan losses (4) (5) $ (11,900,000)