Annual report pursuant to Section 13 and 15(d)

VIEs - Trust Preferred Securities (Details)

v3.6.0.2
VIEs - Trust Preferred Securities (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
USD ($)
Variable Interest Entity [Line Items]  
Principal amount of subordinated note/ debenture issued to trust $ 8,382,552
Huntington Capital I  
Variable Interest Entity [Line Items]  
Rate 1.59%
Principal amount of subordinated note/ debenture issued to trust $ 69,730
Investment in unconsolidated subsidiary $ 6,186
Huntington Capital I | Three-month LIBOR  
Variable Interest Entity [Line Items]  
Basis spread on variable rate 0.70%
Huntington Capital II  
Variable Interest Entity [Line Items]  
Rate 1.59%
Principal amount of subordinated note/ debenture issued to trust $ 32,093
Investment in unconsolidated subsidiary $ 3,093
Huntington Capital II | Three-month LIBOR  
Variable Interest Entity [Line Items]  
Basis spread on variable rate 62.50%
Sky Financial Capital Trust III  
Variable Interest Entity [Line Items]  
Rate 2.40%
Principal amount of subordinated note/ debenture issued to trust $ 72,165
Investment in unconsolidated subsidiary $ 2,165
Sky Financial Capital Trust III | Three-month LIBOR  
Variable Interest Entity [Line Items]  
Basis spread on variable rate 1.40%
Sky Financial Capital Trust IV  
Variable Interest Entity [Line Items]  
Rate 2.25%
Principal amount of subordinated note/ debenture issued to trust $ 74,320
Investment in unconsolidated subsidiary $ 2,320
Sky Financial Capital Trust IV | Three-month LIBOR  
Variable Interest Entity [Line Items]  
Basis spread on variable rate 1.33%
Camco Financial Trust  
Variable Interest Entity [Line Items]  
Rate 3.43%
Principal amount of subordinated note/ debenture issued to trust $ 4,244
Investment in unconsolidated subsidiary 155
Variable Interest Entity, Not Primary Beneficiary  
Variable Interest Entity [Line Items]  
Principal amount of subordinated note/ debenture issued to trust 252,552
Investment in unconsolidated subsidiary $ 13,919