Annual report pursuant to Section 13 and 15(d)

Other Regulatory Matters (Details Textuals)

v2.4.1.9
Other Regulatory Matters (Details Textuals) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Banking and Thrift [Abstract]    
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets  
Capital Required for Capital Adequacy to Risk Weighted Assets 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets  
Tier One Leverage Capital Required for Capital Adequacy to Average Assets 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets  
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets  
Capital Required to be Well Capitalized to Risk Weighted Assets 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets  
Tier One Leverage Capital Required to be Well Capitalized to Average Assets 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets  
Amount Bank Could Lend To Single Affiliate $ 695,600,000hban_AmountBankCouldLendToSingleAffiliate  
Average required reserve balance on deposits $ 200,000,000hban_AverageCashReserveDepositRequiredAndMadeFederalReserveBanks $ 300,000,000hban_AverageCashReserveDepositRequiredAndMadeFederalReserveBanks