Quarterly report pursuant to Section 13 or 15(d)

VIEs - Trust Preferred Securities (Details)

v3.21.2
VIEs - Trust Preferred Securities (Details)
$ in Millions
 9 Months Ended
Sep. 30, 2021
USD ($)
Variable Interest Entity, Not Primary Beneficiary  
Variable Interest Entity [Line Items]  
Long-term Debt, Gross $ 256
Investment in unconsolidated subsidiary $ 14
Huntington Capital I [Member] | London Interbank Offered Rate (LIBOR)  
Variable Interest Entity [Line Items]  
Basis spread on variable rate 0.70%
Huntington Capital I [Member] | Variable Interest Entity, Not Primary Beneficiary  
Variable Interest Entity [Line Items]  
Debt Instrument, Interest Rate, Effective Percentage 0.83%
Long-term Debt, Gross $ 70
Investment in unconsolidated subsidiary $ 7
Huntington Capital II | London Interbank Offered Rate (LIBOR)  
Variable Interest Entity [Line Items]  
Basis spread on variable rate 0.625%
Huntington Capital II | Variable Interest Entity, Not Primary Beneficiary  
Variable Interest Entity [Line Items]  
Debt Instrument, Interest Rate, Effective Percentage 0.76%
Long-term Debt, Gross $ 32
Investment in unconsolidated subsidiary $ 3
Sky Financial Capital Trust III | London Interbank Offered Rate (LIBOR)  
Variable Interest Entity [Line Items]  
Basis spread on variable rate 1.40%
Sky Financial Capital Trust III | Variable Interest Entity, Not Primary Beneficiary  
Variable Interest Entity [Line Items]  
Debt Instrument, Interest Rate, Effective Percentage 1.53%
Long-term Debt, Gross $ 72
Investment in unconsolidated subsidiary $ 2
Sky Financial Capital Trust IV | Variable Interest Entity, Not Primary Beneficiary  
Variable Interest Entity [Line Items]  
Debt Instrument, Interest Rate, Effective Percentage 1.53%
Long-term Debt, Gross $ 74
Investment in unconsolidated subsidiary $ 2
First Place Capital Trust I | London Interbank Offered Rate (LIBOR)  
Variable Interest Entity [Line Items]  
Basis spread on variable rate 2.85%
First Place Capital Trust I | Variable Interest Entity, Not Primary Beneficiary  
Variable Interest Entity [Line Items]  
Debt Instrument, Interest Rate, Effective Percentage 3.00%
Long-term Debt, Gross $ 4
Investment in unconsolidated subsidiary $ 0
First Place Capital Trust II | Variable Interest Entity, Not Primary Beneficiary  
Variable Interest Entity [Line Items]  
Debt Instrument, Interest Rate, Effective Percentage 6.45%
Long-term Debt, Gross $ 4
Investment in unconsolidated subsidiary $ 0