Quarterly report pursuant to Section 13 or 15(d)

Fair Values of Assets and Liabilities (Fair value option-changes in fair value) (Details 4)

v2.4.1.9
Fair Values of Assets and Liabilities (Fair value option-changes in fair value) (Details 4) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mortgages Held For Sale    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) $ 1,001us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= hban_FairValueMeasuredOnRecurringBasisMortgagesHeldForSaleMember 		$ 3,151us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= hban_FairValueMeasuredOnRecurringBasisMortgagesHeldForSaleMember
Automobile Loans    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) (213)us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= hban_FairValueMeasuredOnRecurringBasisAutomobileLoanMember 		(251)us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= hban_FairValueMeasuredOnRecurringBasisAutomobileLoanMember
Fair Value, Option, Credit Risk, Gains (Losses) on Assets 66us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= hban_FairValueMeasuredOnRecurringBasisAutomobileLoanMember 		323us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= hban_FairValueMeasuredOnRecurringBasisAutomobileLoanMember
Securitization Trust Notes Payable    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) $ 0us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= hban_FairValueLiabilitiesMeasuredOnRecurringBasisSecuritizationTrustNotesPayableMember 		$ 0us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= hban_FairValueLiabilitiesMeasuredOnRecurringBasisSecuritizationTrustNotesPayableMember