v3.26.1
Finance Receivables - Summary of Finance Receivables (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Finance receivables $ 55,446 $ 54,876    
Allowance for credit losses (450) (436) $ (435) $ (396)
Deferred dealer participation and other deferred costs 704 688    
Unearned subsidy income (812) (785)    
Finance receivables, net 54,888 54,343 54,274  
Retail        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Finance receivables 50,750 50,173    
Allowance for credit losses (441) (427) (426) (387)
Deferred dealer participation and other deferred costs 704 688    
Unearned subsidy income (812) (785)    
Finance receivables, net 50,201 49,649    
Dealer        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Finance receivables 4,696 4,703    
Allowance for credit losses (9) (9) $ (9) $ (9)
Deferred dealer participation and other deferred costs 0 0    
Unearned subsidy income 0 0    
Finance receivables, net $ 4,687 $ 4,694