Annual report pursuant to Section 13 and 15(d)

VIEs - Trust Preferred Securities (Details)

v3.22.0.1
VIEs - Trust Preferred Securities (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
Variable Interest Entity [Line Items]  
Principal amount of subordinated note/ debenture issued to trust $ 7,003
Variable Interest Entity, Not Primary Beneficiary  
Variable Interest Entity [Line Items]  
Principal amount of subordinated note/ debenture issued to trust 248
Investment in unconsolidated subsidiary $ 14
Huntington Capital I | London Interbank Offered Rate (LIBOR)  
Variable Interest Entity [Line Items]  
Basis spread on variable rate 0.70%
Huntington Capital I | Variable Interest Entity, Not Primary Beneficiary  
Variable Interest Entity [Line Items]  
Rate 0.91%
Principal amount of subordinated note/ debenture issued to trust $ 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]  
Rate 0.83%
Principal amount of subordinated note/ debenture issued to trust $ 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]  
Rate 1.61%
Principal amount of subordinated note/ debenture issued to trust $ 72
Investment in unconsolidated subsidiary $ 2
Sky Financial Capital Trust IV | Variable Interest Entity, Not Primary Beneficiary  
Variable Interest Entity [Line Items]  
Rate 1.61%
Principal amount of subordinated note/ debenture issued to trust $ 74
Investment in unconsolidated subsidiary $ 2