Quarterly report pursuant to Section 13 or 15(d)

Loans and Leases and Allowance for Credit Losses (Details)

v2.4.1.9
Loans and Leases and Allowance for Credit Losses (Details) (USD $)
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Mar. 02, 2014
Mar. 30, 2012
Loan and Lease Portfolio            
Commercial and industrial $ 20,108,742,000us-gaap_LoansReceivableCommercialAndIndustrial   $ 19,033,146,000us-gaap_LoansReceivableCommercialAndIndustrial      
Commercial real estate 5,067,024,000us-gaap_LoansReceivableCommercialRealEstate   5,197,403,000us-gaap_LoansReceivableCommercialRealEstate      
Automobile 7,802,542,000hban_LoansAndLeasesReceivableAutomobile   8,689,902,000hban_LoansAndLeasesReceivableAutomobile      
Home equity 8,492,460,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity   8,490,915,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity      
Residential mortgage 5,794,707,000us-gaap_LoansAndLeasesReceivableConsumerMortgage   5,830,609,000us-gaap_LoansAndLeasesReceivableConsumerMortgage      
Other consumer 430,157,000us-gaap_LoansAndLeasesReceivableConsumerOther   413,751,000us-gaap_LoansAndLeasesReceivableConsumerOther      
Loans and leases 47,695,632,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount   47,655,726,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount      
Allowance for loan and lease losses (605,126,000)us-gaap_LoansAndLeasesReceivableAllowance (631,918,000)us-gaap_LoansAndLeasesReceivableAllowance (605,196,000)us-gaap_LoansAndLeasesReceivableAllowance (647,870,000)us-gaap_LoansAndLeasesReceivableAllowance    
Net loans and leases 47,090,506,000us-gaap_LoansAndLeasesReceivableNetReportedAmount   47,050,530,000us-gaap_LoansAndLeasesReceivableNetReportedAmount      
Loan Purchases and Sales            
Portfolio loans purchased 44,225,000us-gaap_FinancingReceivableSignificantPurchases 40,121,000us-gaap_FinancingReceivableSignificantPurchases        
Portfolio loans sold or transferred to loans held for sale 1,147,559,000us-gaap_FinancingReceivableSignificantSales 54,297,000us-gaap_FinancingReceivableSignificantSales        
Non Accrual Loans            
Non Accrual loans 364,413,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus   300,244,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus      
Camco Financial [Member]            
Business Combinations [Abstract]            
Leases acquired at fair value as of acquisition date         559,400,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialAssets
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		 
Contractually required payments, expected cash flows to be collected, and fair value of loans at acquisition            
Accretable yield   143,000us-gaap_CertainLoansAcquiredInTransferAccretableYield
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		       
Rollforward of accretable yield            
Accretable yield balance, beginning of period 824,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		       
Impact of acquisition   143,000us-gaap_CertainLoansAcquiredInTransferAccretableYield
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		       
Adjustments resulting from changes in purchase price allocation 0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		       
Accretion (336,000)us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		(9,000)us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		       
Reclassification from nonaccretable difference 391,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		       
Accretable yield balance, end of period 879,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		134,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		       
Ending balance and unpaid balance of acquired loans            
Ending balance 2,653,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		  2,531,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		     
Unpaid balance 4,298,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		  5,511,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		     
Fidelity Bank [Member]            
Business Combinations [Abstract]            
Leases acquired at fair value as of acquisition date           523,900,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialAssets
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember
Rollforward of accretable yield            
Accretable yield balance, beginning of period 19,388,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		27,995,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		       
Adjustments resulting from changes in purchase price allocation 0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		       
Accretion (2,874,000)us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		(4,004,000)us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		       
Reclassification from nonaccretable difference 3,677,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		767,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		       
Accretable yield balance, end of period 20,191,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		24,758,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		       
Ending balance and unpaid balance of acquired loans            
Ending balance 56,288,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		  61,031,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		     
Unpaid balance 115,882,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		  124,091,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		     
Macquarie Equipment Finance [Member]            
Business Combinations [Abstract]            
Leases acquired at fair value as of acquisition date 838,600,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialAssets
/ us-gaap_BusinessAcquisitionAxis
= hban_MacquarieEquipmentFinanceMember 		         
Leases acquired lease residual value as of acquisition date 200,000,000hban_Businesscombinationrecognizedidentifiableassetsacquiredandliabilitiesassumedleaseresidualvalue
/ us-gaap_BusinessAcquisitionAxis
= hban_MacquarieEquipmentFinanceMember 		         
Commercial and industrial owner occupied [Member]            
Loan and Lease Portfolio            
Commercial and industrial 4,189,903,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember 		  4,254,875,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember 		     
Non Accrual Loans            
Non Accrual loans 43,540,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember 		  41,285,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember 		     
Commercial and industrial purchased impaired            
Loan and Lease Portfolio            
Commercial and industrial 21,378,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember 		  23,228,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember 		     
Other commercial and industrial [Member]            
Loan and Lease Portfolio            
Commercial and industrial 15,897,461,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember 		  14,755,043,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember 		     
Non Accrual Loans            
Non Accrual loans 89,823,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember 		  30,689,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember 		     
Commercial and Industrial [Member]            
Loan and Lease Portfolio            
Loans and leases 20,108,742,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember 		  19,033,146,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember 		     
Allowance for loan and lease losses (284,573,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember 		(266,979,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember 		(286,995,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember 		(265,801,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember 		   
Loan Purchases and Sales            
Portfolio loans purchased 12,591,000us-gaap_FinancingReceivableSignificantPurchases
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember 		40,121,000us-gaap_FinancingReceivableSignificantPurchases
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember 		       
Portfolio loans sold or transferred to loans held for sale 85,700,000us-gaap_FinancingReceivableSignificantSales
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember 		54,258,000us-gaap_FinancingReceivableSignificantSales
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember 		       
Non Accrual Loans            
Non Accrual loans 133,363,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember 		  71,974,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember 		     
Commercial and Industrial [Member] | Camco Financial [Member]            
Ending balance and unpaid balance of acquired loans            
Ending balance 856,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		  823,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		     
Unpaid balance 1,674,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		  1,685,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		     
Commercial and Industrial [Member] | Fidelity Bank [Member]            
Ending balance and unpaid balance of acquired loans            
Ending balance 20,522,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		  22,405,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		     
Unpaid balance 31,120,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		  33,622,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		     
Commercial real estate retail properties [Member]            
Loan and Lease Portfolio            
Commercial real estate 1,355,894,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember 		  1,357,746,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember 		     
Non Accrual Loans            
Non Accrual loans 25,863,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember 		  21,385,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember 		     
Commercial real estate Multi family [Member]            
Loan and Lease Portfolio            
Commercial real estate 1,029,713,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember 		  1,090,416,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember 		     
Non Accrual Loans            
Non Accrual loans 7,107,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember 		  9,743,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember 		     
Commercial real estate office [Member]            
Loan and Lease Portfolio            
Commercial real estate 948,413,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember 		  980,303,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember 		     
Non Accrual Loans            
Non Accrual loans 7,193,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember 		  7,707,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember 		     
Commercial real estate Industrial and warehouse [Member]            
Loan and Lease Portfolio            
Commercial real estate 515,221,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember 		  513,401,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember 		     
Non Accrual Loans            
Non Accrual loans 2,195,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember 		  3,928,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember 		     
Commercial real estate purchased impaired            
Loan and Lease Portfolio            
Commercial real estate 35,344,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember 		  38,371,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember 		     
Other commercial real estate [Member]            
Loan and Lease Portfolio            
Commercial real estate 1,182,439,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember 		  1,217,166,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember 		     
Non Accrual Loans            
Non Accrual loans 6,905,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember 		  5,760,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember 		     
Commercial Real Estate [Member]            
Loan and Lease Portfolio            
Loans and leases 5,067,024,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember 		  5,197,403,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember 		     
Allowance for loan and lease losses (100,752,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember 		(160,306,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember 		(102,839,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember 		(162,557,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember 		   
Loan Purchases and Sales            
Portfolio loans purchased 0us-gaap_FinancingReceivableSignificantPurchases
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember 		0us-gaap_FinancingReceivableSignificantPurchases
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember 		       
Portfolio loans sold or transferred to loans held for sale 0us-gaap_FinancingReceivableSignificantSales
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember 		39,000us-gaap_FinancingReceivableSignificantSales
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember 		       
Non Accrual Loans            
Non Accrual loans 49,263,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember 		  48,523,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember 		     
Commercial Real Estate [Member] | Camco Financial [Member]            
Ending balance and unpaid balance of acquired loans            
Ending balance 1,797,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		  1,708,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		     
Unpaid balance 2,624,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		  3,826,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		     
Commercial Real Estate [Member] | Fidelity Bank [Member]            
Ending balance and unpaid balance of acquired loans            
Ending balance 33,547,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		  36,663,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		     
Unpaid balance 81,590,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		  87,250,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		     
Automobile Loan [Member]            
Loan and Lease Portfolio            
Loans and leases 7,802,542,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember 		  8,689,902,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember 		     
Allowance for loan and lease losses (37,125,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember 		(25,178,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember 		(33,466,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember 		(31,053,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember 		   
Loan Purchases and Sales            
Portfolio loans purchased 0us-gaap_FinancingReceivableSignificantPurchases
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember 		0us-gaap_FinancingReceivableSignificantPurchases
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember 		       
Portfolio loans sold or transferred to loans held for sale 1,061,859,000us-gaap_FinancingReceivableSignificantSales
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember 		0us-gaap_FinancingReceivableSignificantSales
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember 		       
Non Accrual Loans            
Non Accrual loans 4,448,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember 		  4,623,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember 		     
Automobile Loan [Member] | Camco Financial [Member]            
Ending balance and unpaid balance of acquired loans            
Ending balance 0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		  0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		     
Unpaid balance 0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		  0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		     
Automobile Loan [Member] | Fidelity Bank [Member]            
Ending balance and unpaid balance of acquired loans            
Ending balance 0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		  0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		     
Unpaid balance 0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		  0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		     
Home equity secured by first-lien other [Member]            
Loan and Lease Portfolio            
Home equity 5,154,737,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember 		         
Non Accrual Loans            
Non Accrual loans 44,101,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember 		  46,938,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember 		     
Home equity secured by junior-lien [Member]            
Loan and Lease Portfolio            
Home equity 3,337,723,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember 		         
Non Accrual Loans            
Non Accrual loans 35,145,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember 		  31,622,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember 		     
Home Equity [Member]            
Loan and Lease Portfolio            
Loans and leases 8,492,460,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember 		  8,490,915,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember 		     
Allowance for loan and lease losses (110,280,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember 		(113,177,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember 		(96,413,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember 		(111,131,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember 		   
Loan Purchases and Sales            
Portfolio loans purchased 0us-gaap_FinancingReceivableSignificantPurchases
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember 		0us-gaap_FinancingReceivableSignificantPurchases
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember 		       
Portfolio loans sold or transferred to loans held for sale 0us-gaap_FinancingReceivableSignificantSales
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember 		0us-gaap_FinancingReceivableSignificantSales
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember 		       
Non Accrual Loans            
Non Accrual loans 79,246,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember 		  78,560,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember 		     
Home Equity [Member] | Camco Financial [Member]            
Ending balance and unpaid balance of acquired loans            
Ending balance 0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		  0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		     
Unpaid balance 0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		  0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		     
Home Equity [Member] | Fidelity Bank [Member]            
Ending balance and unpaid balance of acquired loans            
Ending balance 0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		  0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		     
Unpaid balance 0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		  0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		     
Residential mortgage other            
Loan and Lease Portfolio            
Residential mortgage 5,792,539,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember 		         
Non Accrual Loans            
Non Accrual loans 98,093,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember 		  96,564,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember 		     
Residential mortgage purchased impaired            
Loan and Lease Portfolio            
Residential mortgage 2,168,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember 		         
Residential Mortgage [Member]            
Loan and Lease Portfolio            
Loans and leases 5,794,707,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember 		  5,830,609,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember 		     
Allowance for loan and lease losses (55,380,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember 		(39,068,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember 		(47,211,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember 		(39,577,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember 		   
Loan Purchases and Sales            
Portfolio loans purchased 31,634,000us-gaap_FinancingReceivableSignificantPurchases
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember 		0us-gaap_FinancingReceivableSignificantPurchases
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember 		       
Portfolio loans sold or transferred to loans held for sale 0us-gaap_FinancingReceivableSignificantSales
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember 		0us-gaap_FinancingReceivableSignificantSales
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember 		       
Residential Mortgage [Member] | Camco Financial [Member]            
Ending balance and unpaid balance of acquired loans            
Ending balance 0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		  0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		     
Unpaid balance 0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		  0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		     
Residential Mortgage [Member] | Fidelity Bank [Member]            
Ending balance and unpaid balance of acquired loans            
Ending balance 2,168,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		  1,912,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		     
Unpaid balance 3,053,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		  3,096,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		     
Other consumer other            
Loan and Lease Portfolio            
Other consumer 430,106,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember 		         
Non Accrual Loans            
Non Accrual loans 0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember 		  0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember 		     
Other consumer purchased impaired            
Loan and Lease Portfolio            
Other consumer 51,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember 		         
Other Consumer loan [Member]            
Loan and Lease Portfolio            
Loans and leases 430,157,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember 		  413,751,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember 		     
Allowance for loan and lease losses (17,016,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember 		(27,210,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember 		(38,272,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember 		(37,751,000)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember 		   
Loan Purchases and Sales            
Portfolio loans purchased 0us-gaap_FinancingReceivableSignificantPurchases
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember 		0us-gaap_FinancingReceivableSignificantPurchases
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember 		       
Portfolio loans sold or transferred to loans held for sale 0us-gaap_FinancingReceivableSignificantSales
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember 		0us-gaap_FinancingReceivableSignificantSales
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember 		       
Other Consumer loan [Member] | Camco Financial [Member]            
Ending balance and unpaid balance of acquired loans            
Ending balance 0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		  0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		     
Unpaid balance 0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		  0us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
/ us-gaap_BusinessAcquisitionAxis
= hban_CamcoFinancialMember 		     
Other Consumer loan [Member] | Fidelity Bank [Member]            
Ending balance and unpaid balance of acquired loans            
Ending balance 51,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		  51,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		     
Unpaid balance $ 119,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember 		  $ 123,000us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
/ us-gaap_BusinessAcquisitionAxis
= hban_FidelityBankMember