Annual report pursuant to Section 13 and 15(d)

BORROWINGS - Schedule of Long-Term Debt and Debt Issuances (Details)

v3.25.0.1
BORROWINGS - Schedule of Long-Term Debt and Debt Issuances (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Debt Instrument [Line Items]    
Long-term debt [1] $ 16,374 $ 12,394
Senior Notes: | 6.59% Huntington National Bank senior notes due 2025    
Debt Instrument [Line Items]    
Effective rate 6.59%  
Long-term debt $ 0 278
Senior Notes: | 4.01% Huntington National Bank senior notes due 2025    
Debt Instrument [Line Items]    
Effective rate 4.01%  
Long-term debt $ 0 467
Senior Notes: | 5.70% Huntington National Bank senior notes due 2025    
Debt Instrument [Line Items]    
Effective rate 5.70%  
Long-term debt $ 0 1,060
Senior Notes: | 4.55% Huntington National Bank senior notes due 2028    
Debt Instrument [Line Items]    
Effective rate 4.55%  
Long-term debt $ 776 776
Senior Notes: | 5.65% Huntington National Bank senior notes due 2030    
Debt Instrument [Line Items]    
Effective rate 5.65%  
Long-term debt $ 878 899
Subordinated Notes:    
Debt Instrument [Line Items]    
Long-term debt $ 2,169 4,142
Subordinated Notes: | 4.60% Huntington National Bank subordinated notes due 2025    
Debt Instrument [Line Items]    
Effective rate 4.60%  
Long-term debt $ 130 129
Subordinated Notes: | 4.27% Huntington National Bank subordinated notes due 2026    
Debt Instrument [Line Items]    
Effective rate 4.27%  
Long-term debt $ 224 223
Subordinated Notes: | 4.13% Huntington National Bank subordinated notes due 2029    
Debt Instrument [Line Items]    
Effective rate 4.13%  
Long-term debt $ 0 156
Subordinated Notes: | 5.50% Huntington National Bank subordinated notes due 2030    
Debt Instrument [Line Items]    
Effective rate 5.50%  
Long-term debt $ 161 154
4.64% weighted average rate, varying maturities    
Debt Instrument [Line Items]    
Effective rate 4.64%  
Long-term debt $ 4,696 2,731
Auto loan securitization trust (1)    
Debt Instrument [Line Items]    
Long-term debt $ 1,023 0
Weighted average rate 5.31%  
Credit linked notes (1)    
Debt Instrument [Line Items]    
Long-term debt $ 821 0
Other borrowings | Huntington Technology Finance nonrecourse debt, 5.96% weighted average interest rate, varying maturities    
Debt Instrument [Line Items]    
Effective rate 5.96%  
Long-term debt $ 353 343
Other borrowings | Huntington Preferred Capital II - Class I securities    
Debt Instrument [Line Items]    
Effective rate 7.64%  
Long-term debt $ 0 50
Other borrowings | Huntington Preferred Capital II - Class J securities    
Debt Instrument [Line Items]    
Effective rate 7.19%  
Long-term debt $ 75 75
Other borrowings | Huntington Preferred Capital II - Class L securities    
Debt Instrument [Line Items]    
Effective rate 7.69%  
Long-term debt $ 60 60
Parent Company    
Debt Instrument [Line Items]    
Long-term debt $ 7,177 4,993
Parent Company | Senior Notes: | 2.63% Huntington Bancshares Incorporated senior notes due 2024    
Debt Instrument [Line Items]    
Effective rate 2.63%  
Long-term debt $ 0 719
Parent Company | Senior Notes: | 4.00% Huntington Bancshares Incorporated senior notes due 2025    
Debt Instrument [Line Items]    
Effective rate 4.00%  
Long-term debt $ 465 457
Parent Company | Senior Notes: | 4.44% Huntington Bancshares Incorporated senior notes due 2028    
Debt Instrument [Line Items]    
Effective rate 4.44%  
Long-term debt $ 718 716
Parent Company | Senior Notes: | 6.21% Huntington Bancshares Incorporated senior notes due 2029    
Debt Instrument [Line Items]    
Effective rate 6.21%  
Long-term debt $ 1,237 1,266
Parent Company | Senior Notes: | 2.55% Huntington Bancshares Incorporated senior notes due 2030    
Debt Instrument [Line Items]    
Effective rate 2.55%  
Long-term debt $ 685 692
Parent Company | Senior Notes: | 5.27% Huntington Bancshares Incorporated senior notes due 2031    
Debt Instrument [Line Items]    
Effective rate 5.27%  
Long-term debt $ 1,138 0
Parent Company | Senior Notes: | 5.02% Huntington Bancshares Incorporated senior notes due 2033    
Debt Instrument [Line Items]    
Effective rate 5.02%  
Long-term debt $ 371 383
Parent Company | Senior Notes: | 5.71% Huntington Bancshares Incorporated senior notes due 2035    
Debt Instrument [Line Items]    
Effective rate 5.71%  
Long-term debt $ 1,222 0
Parent Company | Subordinated Notes: | Huntington Capital I Trust Preferred 5.55% Junior Subordinated Debentures Due 2027    
Debt Instrument [Line Items]    
Effective rate 5.55%  
Long-term debt $ 70 69
Basis spread on variable rate 0.96%  
Parent Company | Subordinated Notes: | Huntington Capital II Trust Preferred 5.25% Junior Subordinated Debentures Due 2028    
Debt Instrument [Line Items]    
Effective rate 5.25%  
Long-term debt $ 32 32
Basis spread on variable rate 0.886%  
Parent Company | Subordinated Notes: | Sky Financial Capital Trust III 5.99% Junior Subordinated Debentures Due 2036    
Debt Instrument [Line Items]    
Effective rate 5.99%  
Long-term debt $ 72 72
Basis spread on variable rate 1.66%  
Parent Company | Subordinated Notes: | Sky Financial Capital Trust IV 6.25% Junior Subordinated Debentures Due 2036    
Debt Instrument [Line Items]    
Effective rate 6.25%  
Long-term debt $ 74 74
Basis spread on variable rate 1.66%  
Parent Company | Subordinated Notes: | 2.49% Huntington Bancshares Incorporated subordinated notes due 2036    
Debt Instrument [Line Items]    
Effective rate 2.49%  
Long-term debt $ 501 513
Parent Company | Subordinated Notes: | 6.14% Huntington Bancshares Incorporated subordinated notes due 2039    
Debt Instrument [Line Items]    
Effective rate 6.14%  
Long-term debt $ 592 $ 0
Parent Company | Subordinated Notes: | Huntington Preferred Capital II - Class I securities    
Debt Instrument [Line Items]    
Basis spread on variable rate 2.00%  
Parent Company | Subordinated Notes: | Huntington Preferred Capital II - Class J securities    
Debt Instrument [Line Items]    
Basis spread on variable rate 2.60%  
Parent Company | Subordinated Notes: | Huntington Preferred Capital II - Class L securities    
Debt Instrument [Line Items]    
Basis spread on variable rate 3.10%  
[1] Includes VIE balances in net loans and leases, long-term debt, other assets, and other liabilities of $1.1 billion, $1.0 billion, $264 million, and $109 million, respectively, at December 31, 2024, and VIE balances in other assets, and other liabilities of $82 million and $57 million, at December 31, 2023, respectively. See Note 20 - “Variable Interest Entities” for additional information.