Quarterly report pursuant to Section 13 or 15(d)

Fair Values of Assets and Liabilities (Level 3 classification of gains/losses) (Details 2)

v2.4.1.9
Fair Values of Assets and Liabilities (Level 3 classification of gains/losses) (Details 2) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
MSRs [Member]    
Classification of gains and losses in earnings:    
Mortgage banking income (loss) $ (2,331)hban_FairValueAssetMeasuredOnRecurringBasisGainLossIncludedInMortgageBankingIncomeLoss
/ us-gaap_FairValueByAssetClassAxis
= hban_MortgageServicingRightsMember
$ (3,608)hban_FairValueAssetMeasuredOnRecurringBasisGainLossIncludedInMortgageBankingIncomeLoss
/ us-gaap_FairValueByAssetClassAxis
= hban_MortgageServicingRightsMember
Securities gains (losses) 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSecuritiesGainsLosses
/ us-gaap_FairValueByAssetClassAxis
= hban_MortgageServicingRightsMember
0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSecuritiesGainsLosses
/ us-gaap_FairValueByAssetClassAxis
= hban_MortgageServicingRightsMember
Interest and fee income 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInInterestAndFeeIncome
/ us-gaap_FairValueByAssetClassAxis
= hban_MortgageServicingRightsMember
0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInInterestAndFeeIncome
/ us-gaap_FairValueByAssetClassAxis
= hban_MortgageServicingRightsMember
Noninterest income 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInNoninterestIncome
/ us-gaap_FairValueByAssetClassAxis
= hban_MortgageServicingRightsMember
0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInNoninterestIncome
/ us-gaap_FairValueByAssetClassAxis
= hban_MortgageServicingRightsMember
Total (2,331)hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInEarnings
/ us-gaap_FairValueByAssetClassAxis
= hban_MortgageServicingRightsMember
(3,608)hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInEarnings
/ us-gaap_FairValueByAssetClassAxis
= hban_MortgageServicingRightsMember
Derivative Instrument Asset, Net [Member]    
Classification of gains and losses in earnings:    
Mortgage banking income (loss) 5,001hban_FairValueAssetMeasuredOnRecurringBasisGainLossIncludedInMortgageBankingIncomeLoss
/ us-gaap_FairValueByAssetClassAxis
= hban_DerivativeInstrumentAssetNetMember
1,675hban_FairValueAssetMeasuredOnRecurringBasisGainLossIncludedInMortgageBankingIncomeLoss
/ us-gaap_FairValueByAssetClassAxis
= hban_DerivativeInstrumentAssetNetMember
Securities gains (losses) 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSecuritiesGainsLosses
/ us-gaap_FairValueByAssetClassAxis
= hban_DerivativeInstrumentAssetNetMember
0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSecuritiesGainsLosses
/ us-gaap_FairValueByAssetClassAxis
= hban_DerivativeInstrumentAssetNetMember
Interest and fee income 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInInterestAndFeeIncome
/ us-gaap_FairValueByAssetClassAxis
= hban_DerivativeInstrumentAssetNetMember
0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInInterestAndFeeIncome
/ us-gaap_FairValueByAssetClassAxis
= hban_DerivativeInstrumentAssetNetMember
Noninterest income 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInNoninterestIncome
/ us-gaap_FairValueByAssetClassAxis
= hban_DerivativeInstrumentAssetNetMember
0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInNoninterestIncome
/ us-gaap_FairValueByAssetClassAxis
= hban_DerivativeInstrumentAssetNetMember
Total 5,001hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInEarnings
/ us-gaap_FairValueByAssetClassAxis
= hban_DerivativeInstrumentAssetNetMember
1,675hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInEarnings
/ us-gaap_FairValueByAssetClassAxis
= hban_DerivativeInstrumentAssetNetMember
Municipal securities [Member]    
Classification of gains and losses in earnings:    
Mortgage banking income (loss) 0hban_FairValueAssetMeasuredOnRecurringBasisGainLossIncludedInMortgageBankingIncomeLoss
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MunicipalBondsMember
0hban_FairValueAssetMeasuredOnRecurringBasisGainLossIncludedInMortgageBankingIncomeLoss
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MunicipalBondsMember
Securities gains (losses) 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSecuritiesGainsLosses
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MunicipalBondsMember
0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSecuritiesGainsLosses
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MunicipalBondsMember
Interest and fee income 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInInterestAndFeeIncome
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MunicipalBondsMember
0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInInterestAndFeeIncome
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MunicipalBondsMember
Noninterest income 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInNoninterestIncome
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MunicipalBondsMember
0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInNoninterestIncome
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MunicipalBondsMember
Total 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInEarnings
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MunicipalBondsMember
0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInEarnings
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MunicipalBondsMember
Private label CMO [Member]    
Classification of gains and losses in earnings:    
Mortgage banking income (loss) 0hban_FairValueAssetMeasuredOnRecurringBasisGainLossIncludedInMortgageBankingIncomeLoss
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
0hban_FairValueAssetMeasuredOnRecurringBasisGainLossIncludedInMortgageBankingIncomeLoss
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Securities gains (losses) 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSecuritiesGainsLosses
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSecuritiesGainsLosses
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Interest and fee income 16hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInInterestAndFeeIncome
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
9hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInInterestAndFeeIncome
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Noninterest income 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInNoninterestIncome
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInNoninterestIncome
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Total 16hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInEarnings
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
9hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInEarnings
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Asset-backed Securities [Member]    
Classification of gains and losses in earnings:    
Mortgage banking income (loss) 0hban_FairValueAssetMeasuredOnRecurringBasisGainLossIncludedInMortgageBankingIncomeLoss
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AssetBackedSecuritiesMember
0hban_FairValueAssetMeasuredOnRecurringBasisGainLossIncludedInMortgageBankingIncomeLoss
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AssetBackedSecuritiesMember
Securities gains (losses) 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSecuritiesGainsLosses
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AssetBackedSecuritiesMember
0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSecuritiesGainsLosses
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AssetBackedSecuritiesMember
Interest and fee income 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInInterestAndFeeIncome
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AssetBackedSecuritiesMember
22hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInInterestAndFeeIncome
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AssetBackedSecuritiesMember
Noninterest income 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInNoninterestIncome
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AssetBackedSecuritiesMember
0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInNoninterestIncome
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AssetBackedSecuritiesMember
Total 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInEarnings
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AssetBackedSecuritiesMember
22hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInEarnings
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AssetBackedSecuritiesMember
Automobile Loan [Member]    
Classification of gains and losses in earnings:    
Mortgage banking income (loss) 0hban_FairValueAssetMeasuredOnRecurringBasisGainLossIncludedInMortgageBankingIncomeLoss
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AutomobileLoanMember
0hban_FairValueAssetMeasuredOnRecurringBasisGainLossIncludedInMortgageBankingIncomeLoss
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AutomobileLoanMember
Securities gains (losses) 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSecuritiesGainsLosses
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AutomobileLoanMember
0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSecuritiesGainsLosses
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AutomobileLoanMember
Interest and fee income (213)hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInInterestAndFeeIncome
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AutomobileLoanMember
(332)hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInInterestAndFeeIncome
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AutomobileLoanMember
Noninterest income 0hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInNoninterestIncome
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AutomobileLoanMember
81hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInNoninterestIncome
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AutomobileLoanMember
Total $ (213)hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInEarnings
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AutomobileLoanMember
$ (251)hban_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInEarnings
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AutomobileLoanMember