v3.26.1
Finance Receivables - Additional Information (Details)
3 Months Ended
Mar. 31, 2026
USD ($)
counterparty
portfolio
Mar. 31, 2025
USD ($)
Sep. 30, 2025
counterparty
Accounts, Notes, Loans and Financing Receivable      
Length of mean reversion process 3 years    
Number of portfolios | portfolio 2    
Minimum      
Accounts, Notes, Loans and Financing Receivable      
Length of economic forecast 1 year    
Maximum      
Accounts, Notes, Loans and Financing Receivable      
Length of economic forecast 2 years    
Harley-Davidson Financial Services      
Accounts, Notes, Loans and Financing Receivable      
Number of counterparties | counterparty     2
Retail      
Accounts, Notes, Loans and Financing Receivable      
Threshold period past due to be charged-off 120 days    
Reversal of accrued interest against interest income $ 300,000 $ 9,400,000  
Retail | Harley-Davidson Financial Services      
Accounts, Notes, Loans and Financing Receivable      
New loan originations expected to be purchased 0.66667    
Number of counterparties | counterparty 2    
Retail | Harley-Davidson Financial Services | Prime      
Accounts, Notes, Loans and Financing Receivable      
Loan servicing fees, percentage 1.00%    
Retail | Harley-Davidson Financial Services | Sub-prime      
Accounts, Notes, Loans and Financing Receivable      
Loan servicing fees, percentage 2.50%    
Wholesale      
Accounts, Notes, Loans and Financing Receivable      
Reversal of accrued interest against interest income $ 0 $ 100,000  
Increase (decrease) In accrued interest, write-off $ 0