Quarterly report [Sections 13 or 15(d)]

BORROWINGS - Narrative (Details)

v3.25.1
BORROWINGS - Narrative (Details) - USD ($)
3 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Carrying value of assets pledged as collateral against repurchase agreements $ 201,000,000 $ 224,000,000
Maturity term 60 days  
Auto Loan Securitization Trust    
Debt Instrument [Line Items]    
Weighted average rate 5.29%  
Auto Loan Securitization Trust | Huntington National Bank Unsecured Notes Maturing March 2033    
Debt Instrument [Line Items]    
Reference pool $ 3,500,000,000  
Credit Linked Notes | Huntington National Bank Unsecured Notes Maturing March 2033    
Debt Instrument [Line Items]    
Debt face amount $ 415,000,000  
Debt stated interest rate 4.957%  
Credit Linked Notes | Huntington National Bank Unsecured Notes Maturing March 2033 | Minimum    
Debt Instrument [Line Items]    
Basis spread on variable rate 2.25%  
Credit Linked Notes | Huntington National Bank Unsecured Notes Maturing March 2033 | Maximum    
Debt Instrument [Line Items]    
Basis spread on variable rate 7.15%  
Credit Linked Notes | Huntington National Bank Unsecured Notes Maturing March 2033 | Weighted average    
Debt Instrument [Line Items]    
Basis spread on variable rate 4.28%  
Credit Linked Notes | Huntington National Bank Unsecured Notes Maturing May 20, 2032    
Debt Instrument [Line Items]    
Weighted average rate 6.02%  
Senior Notes | Fixed-to-Floating Senior Notes Due April 12, 2028    
Debt Instrument [Line Items]    
Debt face amount $ 1,000,000,000  
Debt stated interest rate 4.871%  
Basis spread on variable rate 0.726%  
Senior Notes | Floating Senior Notes Due April 12, 2028    
Debt Instrument [Line Items]    
Debt face amount $ 500,000,000  
Basis spread on variable rate 0.72%