Annual report pursuant to Section 13 and 15(d)

Derivative Financial Instruments (Fair value hedges) (Details 3)

v2.4.1.9
Derivative Financial Instruments (Fair value hedges) (Details 3) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
FHLB Advances [Member]      
Gains and (losses) recognized in noninterest income on the ineffective portion on interest rate contracts for derivatives designated as fair value and cash flow hedges      
Gains and (losses) recognized in noninterest income on the ineffective portion on interest rate contracts for derivatives designated as cash flow hedges $ 0us-gaap_GainLossOnInterestRateCashFlowHedgeIneffectiveness
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_FhlbAdvancesMember
$ 0us-gaap_GainLossOnInterestRateCashFlowHedgeIneffectiveness
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_FhlbAdvancesMember
$ 0us-gaap_GainLossOnInterestRateCashFlowHedgeIneffectiveness
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_FhlbAdvancesMember
Loan [Member]      
Gains and (losses) recognized in noninterest income on the ineffective portion on interest rate contracts for derivatives designated as fair value and cash flow hedges      
Gains and (losses) recognized in noninterest income on the ineffective portion on interest rate contracts for derivatives designated as cash flow hedges $ 74us-gaap_GainLossOnInterestRateCashFlowHedgeIneffectiveness
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_LoansPayableMember
$ 878us-gaap_GainLossOnInterestRateCashFlowHedgeIneffectiveness
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_LoansPayableMember
$ (179)us-gaap_GainLossOnInterestRateCashFlowHedgeIneffectiveness
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_LoansPayableMember