Annual report pursuant to Section 13 and 15(d)

Loans and Leases and Allowance for Credit Losses (Details 1)

v2.4.1.9
Loans and Leases and Allowance for Credit Losses (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Aging Analysis of Loans and Leases    
Commercial and industrial $ 19,033,146us-gaap_LoansReceivableCommercialAndIndustrial $ 17,594,276us-gaap_LoansReceivableCommercialAndIndustrial
Commercial real estate 5,197,403us-gaap_LoansReceivableCommercialRealEstate 4,850,094us-gaap_LoansReceivableCommercialRealEstate
Automobile 8,689,902hban_LoansAndLeasesReceivableAutomobile 6,638,713hban_LoansAndLeasesReceivableAutomobile
Home equity 8,490,915us-gaap_LoansAndLeasesReceivableConsumerHomeEquity 8,336,318us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
Residential mortgage 5,830,609us-gaap_LoansAndLeasesReceivableConsumerMortgage 5,321,088us-gaap_LoansAndLeasesReceivableConsumerMortgage
Other consumer 413,751us-gaap_LoansAndLeasesReceivableConsumerOther 380,011us-gaap_LoansAndLeasesReceivableConsumerOther
Commercial and industrial owner occupied [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 4,254,875us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
4,347,872us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
Commercial and industrial purchased impaired    
Aging Analysis of Loans and Leases    
Commercial and industrial 23,228us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
 
Other commercial and industrial [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 14,755,043us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
13,210,878us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
Commercial and Industrial [Member]    
Net investments in lease financing receivables by category    
Lease payments receivable 1,051,744us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesMinimumPaymentsToBeReceived
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
1,426,928us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesMinimumPaymentsToBeReceived
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Estimated residual value of leased assets 483,407us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
409,184us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Gross investment in lease financing receivables 1,535,151hban_CapitalLeasesGrossInvestmentInDirectFinancingLeases
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
1,836,112hban_CapitalLeasesGrossInvestmentInDirectFinancingLeases
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Net deferred origination fees/costs 2,557us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesInitialDirectCosts
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
3,105us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesInitialDirectCosts
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Unearned income 131,027us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesDeferredIncome
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
165,052us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesDeferredIncome
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Total net investment in lease financing receivables 1,406,681us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeases
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
1,674,165us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeases
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Commercial real estate retail properties [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 1,357,746us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
1,263,569us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
Commercial real estate Multi family [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 1,090,416us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
1,025,591us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
Commercial real estate office [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 980,303us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
942,293us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
Commercial real estate Industrial and warehouse [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 513,401us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
472,893us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
Commercial real estate purchased impaired    
Aging Analysis of Loans and Leases    
Commercial real estate 38,371us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
 
Other commercial real estate [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 1,217,166us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
1,063,675us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
Home equity secured by first-lien other [Member]    
Aging Analysis of Loans and Leases    
Home equity 5,128,804us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
4,842,144us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
Home equity secured by junior-lien [Member]    
Aging Analysis of Loans and Leases    
Home equity 3,362,111us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
3,494,174us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
Residential mortgage other    
Aging Analysis of Loans and Leases    
Residential mortgage 5,828,697us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
5,318,590us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
Residential Mortgage Purchased Impaired [Member]    
Aging Analysis of Loans and Leases    
Residential mortgage 1,912us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
 
Other consumer other    
Aging Analysis of Loans and Leases    
Other consumer 413,700us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
379,882us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
Other consumer purchased impaired    
Aging Analysis of Loans and Leases    
Other consumer 51us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
 
Due Past 30 To 59 Days [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 21,408us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
16,518us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Commercial real estate 11,471us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
31,130us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Automobile 56,272hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
45,174hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Home equity 37,509us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
49,516us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Residential mortgage 102,702us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
101,778us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Other consumer 5,491us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
6,534us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Due Past 30 To 59 Days [Member] | Commercial and industrial owner occupied [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 5,232us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
5,935us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Due Past 30 To 59 Days [Member] | Commercial and industrial purchased impaired    
Aging Analysis of Loans and Leases    
Commercial and industrial 846us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
241us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Due Past 30 To 59 Days [Member] | Other commercial and industrial [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 15,330us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
10,342us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Due Past 30 To 59 Days [Member] | Commercial real estate retail properties [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 7,866us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
19,372us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Due Past 30 To 59 Days [Member] | Commercial real estate Multi family [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 1,517us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
2,425us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Due Past 30 To 59 Days [Member] | Commercial real estate office [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 464us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
1,635us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Due Past 30 To 59 Days [Member] | Commercial real estate Industrial and warehouse [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 688us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
465us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Due Past 30 To 59 Days [Member] | Commercial real estate purchased impaired    
Aging Analysis of Loans and Leases    
Commercial real estate 89us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
1,311us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Due Past 30 To 59 Days [Member] | Other commercial real estate [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 847us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
5,922us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Due Past 30 To 59 Days [Member] | Home equity secured by first-lien other [Member]    
Aging Analysis of Loans and Leases    
Home equity 15,036us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
20,551us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Due Past 30 To 59 Days [Member] | Home equity secured by junior-lien [Member]    
Aging Analysis of Loans and Leases    
Home equity 22,473us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
28,965us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Due Past 30 To 59 Days [Member] | Residential mortgage other    
Aging Analysis of Loans and Leases    
Residential mortgage 102,702us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
101,584us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Due Past 30 To 59 Days [Member] | Residential Mortgage Purchased Impaired [Member]    
Aging Analysis of Loans and Leases    
Residential mortgage 0us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
194us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Due Past 30 To 59 Days [Member] | Other consumer other    
Aging Analysis of Loans and Leases    
Other consumer 5,491us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
6,465us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Due Past 30 To 59 Days [Member] | Other consumer purchased impaired    
Aging Analysis of Loans and Leases    
Other consumer 0us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
69us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Due Past 60 To 89 Days [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 4,517us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
5,387us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Commercial real estate 3,049us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
7,564us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Automobile 10,427hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
8,863hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Home equity 20,382us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
21,817us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Residential mortgage 42,009us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
41,784us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Other consumer 1,086us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
1,276us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Due Past 60 To 89 Days [Member] | Commercial and industrial owner occupied [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 2,981us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
1,879us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Due Past 60 To 89 Days [Member] | Commercial and industrial purchased impaired    
Aging Analysis of Loans and Leases    
Commercial and industrial 0us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
433us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Due Past 60 To 89 Days [Member] | Other commercial and industrial [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 1,536us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
3,075us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Due Past 60 To 89 Days [Member] | Commercial real estate retail properties [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 0us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
1,228us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Due Past 60 To 89 Days [Member] | Commercial real estate Multi family [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 312us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
943us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Due Past 60 To 89 Days [Member] | Commercial real estate office [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 1,167us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
545us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Due Past 60 To 89 Days [Member] | Commercial real estate Industrial and warehouse [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 0us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
3,714us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Due Past 60 To 89 Days [Member] | Commercial real estate purchased impaired    
Aging Analysis of Loans and Leases    
Commercial real estate 289us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
0us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Due Past 60 To 89 Days [Member] | Other commercial real estate [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 1,281us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
1,134us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Due Past 60 To 89 Days [Member] | Home equity secured by first-lien other [Member]    
Aging Analysis of Loans and Leases    
Home equity 8,085us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
8,746us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Due Past 60 To 89 Days [Member] | Home equity secured by junior-lien [Member]    
Aging Analysis of Loans and Leases    
Home equity 12,297us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
13,071us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Due Past 60 To 89 Days [Member] | Residential mortgage other    
Aging Analysis of Loans and Leases    
Residential mortgage 42,009us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
41,784us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Due Past 60 To 89 Days [Member] | Residential Mortgage Purchased Impaired [Member]    
Aging Analysis of Loans and Leases    
Residential mortgage 0us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
0us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Due Past 60 To 89 Days [Member] | Other consumer other    
Aging Analysis of Loans and Leases    
Other consumer 1,086us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
1,276us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Due Past 60 To 89 Days [Member] | Other consumer purchased impaired    
Aging Analysis of Loans and Leases    
Other consumer 0us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
0us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Due Past 90 Or More Days [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 32,260us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
51,430us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Commercial real estate 37,181us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
75,407us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Automobile 5,963hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
5,140hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Home equity 66,420us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
59,864us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Residential mortgage 139,379us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
159,295us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Other consumer 837us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
998us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Due Past 90 Or More Days [Member] | Commercial and industrial owner occupied [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 18,222us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
25,658us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Due Past 90 Or More Days [Member] | Commercial and industrial purchased impaired    
Aging Analysis of Loans and Leases    
Commercial and industrial 4,937us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
14,562us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Due Past 90 Or More Days [Member] | Other commercial and industrial [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 9,101us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
11,210us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Due Past 90 Or More Days [Member] | Commercial real estate retail properties [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 4,021us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
5,252us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Due Past 90 Or More Days [Member] | Commercial real estate Multi family [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 3,337us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
6,726us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Due Past 90 Or More Days [Member] | Commercial real estate office [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 4,415us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
12,700us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Due Past 90 Or More Days [Member] | Commercial real estate Industrial and warehouse [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 2,649us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
4,395us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Due Past 90 Or More Days [Member] | Commercial real estate purchased impaired    
Aging Analysis of Loans and Leases    
Commercial real estate 18,793us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
39,142us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Due Past 90 Or More Days [Member] | Other commercial real estate [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 3,966us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
7,192us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Due Past 90 Or More Days [Member] | Home equity secured by first-lien other [Member]    
Aging Analysis of Loans and Leases    
Home equity 33,014us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
28,472us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Due Past 90 Or More Days [Member] | Home equity secured by junior-lien [Member]    
Aging Analysis of Loans and Leases    
Home equity 33,406us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
31,392us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Due Past 90 Or More Days [Member] | Residential mortgage other    
Aging Analysis of Loans and Leases    
Residential mortgage 139,379us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
158,956us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Due Past 90 Or More Days [Member] | Residential Mortgage Purchased Impaired [Member]    
Aging Analysis of Loans and Leases    
Residential mortgage 0us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
339us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Due Past 90 Or More Days [Member] | Other consumer other    
Aging Analysis of Loans and Leases    
Other consumer 837us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
998us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Due Past 90 Or More Days [Member] | Other consumer purchased impaired    
Aging Analysis of Loans and Leases    
Other consumer 0us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
0us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Due Past [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 58,185us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
73,335us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Commercial real estate 51,701us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
114,101us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Automobile 72,662hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
59,177hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Home equity 124,311us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
131,197us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Residential mortgage 284,090us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
302,857us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Other consumer 7,414us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
8,808us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Due Past [Member] | Commercial and industrial owner occupied [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 26,435us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
33,472us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Due Past [Member] | Commercial and industrial purchased impaired    
Aging Analysis of Loans and Leases    
Commercial and industrial 5,783us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
15,236us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Due Past [Member] | Other commercial and industrial [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 25,967us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
24,627us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Due Past [Member] | Commercial real estate retail properties [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 11,887us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
25,852us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Due Past [Member] | Commercial real estate Multi family [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 5,166us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
10,094us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Due Past [Member] | Commercial real estate office [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 6,046us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
14,880us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Due Past [Member] | Commercial real estate Industrial and warehouse [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 3,337us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
8,574us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Due Past [Member] | Commercial real estate purchased impaired    
Aging Analysis of Loans and Leases    
Commercial real estate 19,171us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
40,453us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Due Past [Member] | Other commercial real estate [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 6,094us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
14,248us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Due Past [Member] | Home equity secured by first-lien other [Member]    
Aging Analysis of Loans and Leases    
Home equity 56,135us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
57,769us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Due Past [Member] | Home equity secured by junior-lien [Member]    
Aging Analysis of Loans and Leases    
Home equity 68,176us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
73,428us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Due Past [Member] | Residential mortgage other    
Aging Analysis of Loans and Leases    
Residential mortgage 284,090us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
302,324us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Due Past [Member] | Residential Mortgage Purchased Impaired [Member]    
Aging Analysis of Loans and Leases    
Residential mortgage 0us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
533us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Due Past [Member] | Other consumer other    
Aging Analysis of Loans and Leases    
Other consumer 7,414us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
8,739us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Due Past [Member] | Other consumer purchased impaired    
Aging Analysis of Loans and Leases    
Other consumer 0us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
69us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Current Loans And Leases [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 18,974,961us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
17,520,941us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Commercial real estate 5,145,702us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
4,735,993us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Automobile 8,617,240hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
6,579,536hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Home equity 8,366,604us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
8,205,121us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Residential mortgage 5,546,519us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
5,018,231us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Other consumer 406,337us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
371,203us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Current Loans And Leases [Member] | Commercial and industrial owner occupied [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 4,228,440us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
4,314,400us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Current Loans And Leases [Member] | Commercial and industrial purchased impaired    
Aging Analysis of Loans and Leases    
Commercial and industrial 17,445us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
20,290us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Current Loans And Leases [Member] | Other commercial and industrial [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 14,729,076us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
13,186,251us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Current Loans And Leases [Member] | Commercial real estate retail properties [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 1,345,859us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
1,237,717us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Current Loans And Leases [Member] | Commercial real estate Multi family [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 1,085,250us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
1,015,497us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Current Loans And Leases [Member] | Commercial real estate office [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 974,257us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
927,413us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Current Loans And Leases [Member] | Commercial real estate Industrial and warehouse [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 510,064us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
464,319us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Current Loans And Leases [Member] | Commercial real estate purchased impaired    
Aging Analysis of Loans and Leases    
Commercial real estate 19,200us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
41,620us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Current Loans And Leases [Member] | Other commercial real estate [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 1,211,072us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
1,049,427us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Current Loans And Leases [Member] | Home equity secured by first-lien other [Member]    
Aging Analysis of Loans and Leases    
Home equity 5,072,669us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
4,784,375us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Current Loans And Leases [Member] | Home equity secured by junior-lien [Member]    
Aging Analysis of Loans and Leases    
Home equity 3,293,935us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
3,420,746us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Current Loans And Leases [Member] | Residential mortgage other    
Aging Analysis of Loans and Leases    
Residential mortgage 5,544,607us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
5,016,266us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Current Loans And Leases [Member] | Residential Mortgage Purchased Impaired [Member]    
Aging Analysis of Loans and Leases    
Residential mortgage 1,912us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
1,965us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Current Loans And Leases [Member] | Other consumer other    
Aging Analysis of Loans and Leases    
Other consumer 406,286us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
371,143us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Current Loans And Leases [Member] | Other consumer purchased impaired    
Aging Analysis of Loans and Leases    
Other consumer 51us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
60us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Total Loans And Leases [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 19,033,146us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
17,594,276us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Commercial real estate 5,197,403us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
4,850,094us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Automobile 8,689,902hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
6,638,713hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Home equity 8,490,915us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
8,336,318us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Residential mortgage 5,830,609us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
5,321,088us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Other consumer 413,751us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
380,011us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Total Loans And Leases [Member] | Commercial and industrial owner occupied [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 4,254,875us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
4,347,872us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Total Loans And Leases [Member] | Commercial and industrial purchased impaired    
Aging Analysis of Loans and Leases    
Commercial and industrial 23,228us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
35,526us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Total Loans And Leases [Member] | Other commercial and industrial [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 14,755,043us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
13,210,878us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Total Loans And Leases [Member] | Commercial real estate retail properties [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 1,357,746us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
1,263,569us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Total Loans And Leases [Member] | Commercial real estate Multi family [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 1,090,416us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
1,025,591us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Total Loans And Leases [Member] | Commercial real estate office [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 980,303us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
942,293us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Total Loans And Leases [Member] | Commercial real estate Industrial and warehouse [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 513,401us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
472,893us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Total Loans And Leases [Member] | Commercial real estate purchased impaired    
Aging Analysis of Loans and Leases    
Commercial real estate 38,371us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
82,073us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Total Loans And Leases [Member] | Other commercial real estate [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 1,217,166us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
1,063,675us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Total Loans And Leases [Member] | Home equity secured by first-lien other [Member]    
Aging Analysis of Loans and Leases    
Home equity 5,128,804us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
4,842,144us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Total Loans And Leases [Member] | Home equity secured by junior-lien [Member]    
Aging Analysis of Loans and Leases    
Home equity 3,362,111us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
3,494,174us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Total Loans And Leases [Member] | Residential mortgage other    
Aging Analysis of Loans and Leases    
Residential mortgage 5,828,697us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
5,318,590us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Total Loans And Leases [Member] | Residential Mortgage Purchased Impaired [Member]    
Aging Analysis of Loans and Leases    
Residential mortgage 1,912us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
2,498us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Total Loans And Leases [Member] | Other consumer other    
Aging Analysis of Loans and Leases    
Other consumer 413,700us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
379,882us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Total Loans And Leases [Member] | Other consumer purchased impaired    
Aging Analysis of Loans and Leases    
Other consumer 51us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
129us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
Due Past And Accruing 90 Or More Days [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 4,937us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
14,562us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Commercial real estate 18,793us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
39,142us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Automobile 5,703hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
5,055hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Home equity 12,159us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
13,983us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Residential mortgage 88,052us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
90,454us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
[1]
Other consumer 837us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
998us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Due Past And Accruing 90 Or More Days [Member] | Commercial and industrial owner occupied [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 0us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
0us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Due Past And Accruing 90 Or More Days [Member] | Commercial and industrial purchased impaired    
Aging Analysis of Loans and Leases    
Commercial and industrial 4,937us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
[2] 14,562us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Due Past And Accruing 90 Or More Days [Member] | Other commercial and industrial [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 0us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
0us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Due Past And Accruing 90 Or More Days [Member] | Commercial real estate retail properties [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 0us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
0us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Due Past And Accruing 90 Or More Days [Member] | Commercial real estate Multi family [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 0us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
0us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Due Past And Accruing 90 Or More Days [Member] | Commercial real estate office [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 0us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
0us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Due Past And Accruing 90 Or More Days [Member] | Commercial real estate Industrial and warehouse [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 0us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
0us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Due Past And Accruing 90 Or More Days [Member] | Commercial real estate purchased impaired    
Aging Analysis of Loans and Leases    
Commercial real estate 18,793us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
[2] 39,142us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Due Past And Accruing 90 Or More Days [Member] | Other commercial real estate [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 0us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
0us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Due Past And Accruing 90 Or More Days [Member] | Home equity secured by first-lien other [Member]    
Aging Analysis of Loans and Leases    
Home equity 4,471us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
6,338us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Due Past And Accruing 90 Or More Days [Member] | Home equity secured by junior-lien [Member]    
Aging Analysis of Loans and Leases    
Home equity 7,688us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
7,645us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Due Past And Accruing 90 Or More Days [Member] | Residential mortgage other    
Aging Analysis of Loans and Leases    
Residential mortgage 88,052us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
[1] 90,115us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Due Past And Accruing 90 Or More Days [Member] | Residential Mortgage Purchased Impaired [Member]    
Aging Analysis of Loans and Leases    
Residential mortgage 0us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
[2] 339us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Due Past And Accruing 90 Or More Days [Member] | Other consumer other    
Aging Analysis of Loans and Leases    
Other consumer 837us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
998us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Due Past And Accruing 90 Or More Days [Member] | Other consumer purchased impaired    
Aging Analysis of Loans and Leases    
Other consumer $ 0us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
[2] $ 0us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
[1]
Includes $55,012 thousand guaranteed by the U.S. government.
[2]
All amounts represent accruing purchased credit-impaired loans related to the Camco Financial and FDIC-assisted Fidelity Bank acquisition. Under the applicable accounting guidance (ASC-310-30), the loans were recorded at fair value upon acquisition and remain in accruing status.