Annual report pursuant to Section 13 and 15(d)

Derivative Financial Instruments (Cash flow hedges) (Details 2)

v2.4.1.9
Derivative Financial Instruments (Cash flow hedges) (Details 2) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges      
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) $ 9,192us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet $ (56,056)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet $ (3,569)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) (3,971)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet (15,188)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet 14,992us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
Hedged Other long term debt [Member] | Interest expense subordinated notes and other long term debt [Member]      
Increase or (decrease) to interest expense for derivatives designated as fair value hedges      
Increase or (decrease) to interest expense for derivatives designated as fair value hedges 828us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_HedgedOtherLongTermDebtMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseSubordinatedNotesAndOtherLongTermDebtMember 		6,843us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_HedgedOtherLongTermDebtMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseSubordinatedNotesAndOtherLongTermDebtMember 		(114)us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_HedgedOtherLongTermDebtMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseSubordinatedNotesAndOtherLongTermDebtMember
Hedged Subordinated notes [Member] | Interest expense subordinated notes and other long term debt [Member]      
Increase or (decrease) to interest expense for derivatives designated as fair value hedges      
Increase or (decrease) to interest expense for derivatives designated as fair value hedges (476)us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_HedgedSubordinatedNotesMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseSubordinatedNotesAndOtherLongTermDebtMember 		44,699us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_HedgedSubordinatedNotesMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseSubordinatedNotesAndOtherLongTermDebtMember 		(1,432)us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_HedgedSubordinatedNotesMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseSubordinatedNotesAndOtherLongTermDebtMember
Hedged Deposits [Member] | Interest expense deposits [Member]      
Increase or (decrease) to interest expense for derivatives designated as fair value hedges      
Increase or (decrease) to interest expense for derivatives designated as fair value hedges 1,025us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_HedgedDepositsMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseDepositsMember 		4,003us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_HedgedDepositsMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseDepositsMember 		2,601us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_HedgedDepositsMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseDepositsMember
FHLB Advances [Member] | Cash flow hedging [Member]      
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges      
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) 0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_FhlbAdvancesMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_FhlbAdvancesMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_FhlbAdvancesMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) 0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_FhlbAdvancesMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_FhlbAdvancesMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_FhlbAdvancesMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Loan [Member] | Cash flow hedging [Member]      
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges      
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) 9,192us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_LoansPayableMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		(56,056)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_LoansPayableMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		(2,866)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_LoansPayableMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) (4,064)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_LoansPayableMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		(14,979)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_LoansPayableMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		14,849us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_LoansPayableMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Investment securities [Member] | Cash flow hedging [Member]      
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges      
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) 0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_SecuritiesInvestmentMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_SecuritiesInvestmentMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		(703)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_SecuritiesInvestmentMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) 93us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_SecuritiesInvestmentMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		(209)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_SecuritiesInvestmentMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_SecuritiesInvestmentMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Deposits [Member] | Cash flow hedging [Member]      
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges      
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) 0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_DepositsMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_DepositsMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_DepositsMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) 0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_DepositsMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_DepositsMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_DepositsMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Deposits [Member] | Interest expense deposits [Member]      
Increase or (decrease) to interest expense for derivatives designated as fair value hedges      
Increase or (decrease) to interest expense for derivatives designated as fair value hedges (1,045)us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_DepositsMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseDepositsMember 		(4,006)us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_DepositsMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseDepositsMember 		(2,526)us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_DepositsMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseDepositsMember
Subordinated notes | Cash flow hedging [Member]      
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges      
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) 0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_SubordinatedNotesMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_SubordinatedNotesMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_SubordinatedNotesMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) 0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_SubordinatedNotesMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_SubordinatedNotesMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		143us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_SubordinatedNotesMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Subordinated notes | Interest expense subordinated notes and other long term debt [Member]      
Increase or (decrease) to interest expense for derivatives designated as fair value hedges      
Increase or (decrease) to interest expense for derivatives designated as fair value hedges 476us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_SubordinatedNotesMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseSubordinatedNotesAndOtherLongTermDebtMember 		(44,699)us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_SubordinatedNotesMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseSubordinatedNotesAndOtherLongTermDebtMember 		1,432us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_SubordinatedNotesMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseSubordinatedNotesAndOtherLongTermDebtMember
Other long-term debt | Cash flow hedging [Member]      
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges      
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) 0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_OtherLongTermDebtMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_OtherLongTermDebtMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_OtherLongTermDebtMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) 0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_OtherLongTermDebtMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_OtherLongTermDebtMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember 		0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_OtherLongTermDebtMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Other long-term debt | Interest expense subordinated notes and other long term debt [Member]      
Increase or (decrease) to interest expense for derivatives designated as fair value hedges      
Increase or (decrease) to interest expense for derivatives designated as fair value hedges $ 1,990us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_OtherLongTermDebtMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseSubordinatedNotesAndOtherLongTermDebtMember 		$ (5,716)us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_OtherLongTermDebtMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseSubordinatedNotesAndOtherLongTermDebtMember 		$ 114us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_OtherLongTermDebtMember
/ us-gaap_IncomeStatementLocationAxis
= hban_InterestExpenseSubordinatedNotesAndOtherLongTermDebtMember