Annual report pursuant to Section 13 and 15(d)

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

v3.22.4
BORROWINGS - Schedule of Long-Term Debt and Debt Issuances (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Long-term debt $ 9,686 $ 7,108
Senior Notes | 2.55% Huntington National Bank senior notes due 2022    
Debt Instrument [Line Items]    
Long-term debt $ 0 703
Effective rate 2.55%  
Senior Notes | 3.16% Huntington National Bank senior notes due 2022    
Debt Instrument [Line Items]    
Long-term debt $ 0 500
Effective rate 3.16%  
Senior Notes | 1.83% Huntington National Bank senior notes due 2023    
Debt Instrument [Line Items]    
Long-term debt $ 0 483
Effective rate 1.83%  
Senior Notes | 3.60% Huntington National Bank senior notes due 2023    
Debt Instrument [Line Items]    
Long-term debt $ 735 748
Effective rate 3.60%  
Senior Notes | 5.42% Huntington National Bank senior notes due 2025    
Debt Instrument [Line Items]    
Long-term debt $ 299 0
Effective rate 5.42%  
Senior Notes | 4.11% Huntington National Bank senior notes due 2025    
Debt Instrument [Line Items]    
Long-term debt $ 486 0
Effective rate 4.11%  
Senior Notes | 5.70% Huntington National Bank senior notes due 2025    
Debt Instrument [Line Items]    
Long-term debt $ 1,094 0
Effective rate 5.70%  
Senior Notes | 4.55% Huntington National Bank senior notes due 2028    
Debt Instrument [Line Items]    
Long-term debt $ 766 0
Effective rate 4.55%  
Senior Notes | 5.76% Huntington National Bank senior notes due 2030    
Debt Instrument [Line Items]    
Long-term debt $ 892 0
Effective rate 5.76%  
Subordinated Notes    
Debt Instrument [Line Items]    
Long-term debt $ 4,923 3,245
Subordinated Notes | Huntington National Bank subordinated notes due 2022    
Debt Instrument [Line Items]    
Long-term debt $ 0 113
Effective rate 0.64%  
Subordinated Notes | Huntington National Bank subordinated notes due 2025    
Debt Instrument [Line Items]    
Long-term debt $ 129 142
Effective rate 0.96%  
Subordinated Notes | Huntington National Bank subordinated notes due 2026    
Debt Instrument [Line Items]    
Long-term debt $ 218 226
Effective rate 3.86%  
Subordinated Notes | Huntington National Bank subordinated notes due 2029    
Debt Instrument [Line Items]    
Long-term debt $ 153 161
Effective rate 3.03%  
Subordinated Notes | Huntington National Bank subordinated notes due 2030    
Debt Instrument [Line Items]    
Long-term debt $ 151 169
Effective rate 3.75%  
Federal Home Loan Bank advances    
Debt Instrument [Line Items]    
Long-term debt $ 211 215
Effective rate 1.04%  
Other borrowings | Huntington Technology Finance nonrecourse debt, 3.93% weighted average interest rate, varying maturities    
Debt Instrument [Line Items]    
Long-term debt $ 337 287
Effective rate 3.93%  
Other borrowings | 2.09% Huntington Preferred Capital II - Class F securities    
Debt Instrument [Line Items]    
Long-term debt $ 0 75
Effective rate 2.09%  
Other borrowings | 6.65% Huntington Preferred Capital II - Class G securities (4)    
Debt Instrument [Line Items]    
Long-term debt $ 50 50
Effective rate 6.65%  
Other borrowings | 6.77% Huntington Preferred Capital II - Class I securities (5)    
Debt Instrument [Line Items]    
Long-term debt $ 50 50
Effective rate 6.77%  
Other borrowings | 6.90% Huntington Preferred Capital II - Class J securities (6)    
Debt Instrument [Line Items]    
Long-term debt $ 75 75
Effective rate 6.90%  
Other borrowings | 7.40% Huntington Preferred Capital II - Class L Securities (7)    
Debt Instrument [Line Items]    
Long-term debt $ 60 0
Effective rate 7.40%  
Parent Company    
Debt Instrument [Line Items]    
Long-term debt $ 3,980 3,111
Parent Company | Senior Notes | 2.67% Huntington Bancshares Incorporated senior notes due 2024    
Debt Instrument [Line Items]    
Long-term debt $ 762 812
Effective rate 2.67%  
Parent Company | Senior Notes | 4.05% Huntington Bancshares Incorporated senior notes due 2025    
Debt Instrument [Line Items]    
Long-term debt $ 481 527
Effective rate 4.05%  
Parent Company | Senior Notes | 4.51% Huntington Bancshares Incorporated senior notes due 2028    
Debt Instrument [Line Items]    
Long-term debt $ 704 0
Effective rate 4.51%  
Parent Company | Senior Notes | 2.60% Huntington Bancshares Incorporated senior notes due 2030    
Debt Instrument [Line Items]    
Long-term debt $ 679 744
Effective rate 2.60%  
Parent Company | Senior Notes | 5.08% Huntington Bancshares Incorporated senior notes due 2033    
Debt Instrument [Line Items]    
Long-term debt $ 379 0
Effective rate 5.08%  
Parent Company | Subordinated Notes | 3.55% Huntington Bancshares Incorporated subordinated notes due 2023    
Debt Instrument [Line Items]    
Long-term debt $ 225 227
Effective rate 3.55%  
Parent Company | Subordinated Notes | Huntington Capital I Trust Preferred 0.94% junior subordinated debentures due 2027    
Debt Instrument [Line Items]    
Long-term debt $ 69 69
Effective rate 5.47%  
Parent Company | Subordinated Notes | Huntington Capital II Trust Preferred 0.86% junior subordinated debentures due 2028    
Debt Instrument [Line Items]    
Long-term debt $ 32 32
Effective rate 5.39%  
Parent Company | Subordinated Notes | Sky Financial Capital Trust III 1.64% junior subordinated debentures due 2036    
Debt Instrument [Line Items]    
Long-term debt $ 72 72
Effective rate 6.17%  
Parent Company | Subordinated Notes | Sky Financial Capital Trust IV 1.64% junior subordinated debentures due 2036    
Debt Instrument [Line Items]    
Long-term debt $ 74 74
Effective rate 6.17%  
Parent Company | Subordinated Notes | 2.49% Huntington Bancshares Incorporated subordinated notes due 2036    
Debt Instrument [Line Items]    
Long-term debt $ 1 554
Effective rate 2.49%  
Parent Company | Subordinated Notes | 2.53% Huntington Bancshares Incorporated subordinated notes due 2036    
Debt Instrument [Line Items]    
Long-term debt $ 502 $ 0
Effective rate 2.53%  
Parent Company | Subordinated Notes | London Interbank Offered Rate (LIBOR) | Huntington Capital I Trust Preferred 0.94% junior subordinated debentures due 2027    
Debt Instrument [Line Items]    
Basis spread on variable rate 0.70%  
Parent Company | Subordinated Notes | London Interbank Offered Rate (LIBOR) | Huntington Capital II Trust Preferred 0.86% junior subordinated debentures due 2028    
Debt Instrument [Line Items]    
Basis spread on variable rate 0.625%  
Parent Company | Subordinated Notes | London Interbank Offered Rate (LIBOR) | Sky Financial Capital Trust IV 1.64% junior subordinated debentures due 2036    
Debt Instrument [Line Items]    
Basis spread on variable rate 1.40%  
Parent Company | Subordinated Notes | London Interbank Offered Rate (LIBOR) | 6.65% Huntington Preferred Capital II - Class G securities (4)    
Debt Instrument [Line Items]    
Basis spread on variable rate 1.88%  
Parent Company | Subordinated Notes | London Interbank Offered Rate (LIBOR) | 6.77% Huntington Preferred Capital II - Class I securities (5)    
Debt Instrument [Line Items]    
Basis spread on variable rate 2.00%  
Parent Company | Subordinated Notes | London Interbank Offered Rate (LIBOR) | 6.90% Huntington Preferred Capital II - Class J securities (6)    
Debt Instrument [Line Items]    
Basis spread on variable rate 2.60%  
Parent Company | Subordinated Notes | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | 7.40% Huntington Preferred Capital II - Class L Securities (7)    
Debt Instrument [Line Items]    
Basis spread on variable rate 3.10%