Annual report pursuant to Section 13 and 15(d)

Derivative Financial Instruments (Mortgage banking activities) (Details 6)

v2.4.1.9
Derivative Financial Instruments (Mortgage banking activities) (Details 6) (Derivative used in Mortgage Banking Activities [Member], USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Derivative assets:    
Total derivative assets $ 4,099us-gaap_DerivativeFairValueOfDerivativeAsset $ 7,063us-gaap_DerivativeFairValueOfDerivativeAsset
Derivative liabilities:    
Total derivative liabilities (4,019)us-gaap_DerivativeFairValueOfDerivativeLiability (271)us-gaap_DerivativeFairValueOfDerivativeLiability
Net derivative asset (liability) 80us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet 6,792us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
Interest rate lock agreements [Member]    
Derivative assets:    
Total derivative assets 4,064us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_DerivativeByNatureAxis
= hban_DerivativeUsedInMortgageBankingActivitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateLockCommitmentsMember
3,066us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_DerivativeByNatureAxis
= hban_DerivativeUsedInMortgageBankingActivitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateLockCommitmentsMember
Derivative liabilities:    
Total derivative liabilities (259)us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_DerivativeByNatureAxis
= hban_DerivativeUsedInMortgageBankingActivitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateLockCommitmentsMember
(231)us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_DerivativeByNatureAxis
= hban_DerivativeUsedInMortgageBankingActivitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateLockCommitmentsMember
Forward trades and options [Member]    
Derivative assets:    
Total derivative assets 35us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_DerivativeByNatureAxis
= hban_DerivativeUsedInMortgageBankingActivitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_ForwardTradesAndOptionsMember
3,997us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_DerivativeByNatureAxis
= hban_DerivativeUsedInMortgageBankingActivitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_ForwardTradesAndOptionsMember
Derivative liabilities:    
Total derivative liabilities $ (3,760)us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_DerivativeByNatureAxis
= hban_DerivativeUsedInMortgageBankingActivitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_ForwardTradesAndOptionsMember
$ (40)us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_DerivativeByNatureAxis
= hban_DerivativeUsedInMortgageBankingActivitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hban_ForwardTradesAndOptionsMember