Quarterly report pursuant to Section 13 or 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 $)
Mar. 31, 2015
Dec. 31, 2014
Aging Analysis of Loans and Leases    
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
Commercial and industrial owner occupied [Member]    
Aging Analysis of Loans and Leases    
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
Commercial and industrial purchased impaired    
Aging Analysis of Loans and Leases    
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]    
Aging Analysis of Loans and Leases    
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
Commercial real estate retail properties [Member]    
Aging Analysis of Loans and Leases    
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
Commercial real estate Multi family [Member]    
Aging Analysis of Loans and Leases    
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
Commercial real estate office [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 948,413,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
980,303,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
Commercial real estate Industrial and warehouse [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 515,221,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
513,401,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
Commercial real estate purchased impaired    
Aging Analysis of Loans and Leases    
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]    
Aging Analysis of Loans and Leases    
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
Home equity secured by first-lien other [Member]    
Aging Analysis of Loans and Leases    
Home equity 5,154,737,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
 
Home equity secured by junior-lien [Member]    
Aging Analysis of Loans and Leases    
Home equity 3,337,723,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
 
Residential mortgage other    
Aging Analysis of Loans and Leases    
Residential mortgage 5,792,539,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
 
Residential Mortgage Purchased Impaired [Member]    
Aging Analysis of Loans and Leases    
Residential mortgage 2,168,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
 
Other consumer other    
Aging Analysis of Loans and Leases    
Other consumer 430,106,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
 
Other consumer purchased impaired    
Aging Analysis of Loans and Leases    
Other consumer 51,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
 
Due Past 30 To 59 Days [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 34,229,000us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
21,408,000us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Commercial real estate 4,292,000us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
11,471,000us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Automobile 43,061,000hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
56,272,000hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Home equity 33,796,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
37,509,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Residential mortgage 92,277,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
102,702,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
Other consumer 4,255,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
5,491,000us-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 8,174,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
5,232,000us-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 879,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
846,000us-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 25,176,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
15,330,000us-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 126,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
7,866,000us-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 1,068,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
1,517,000us-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 780,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
464,000us-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 616,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
688,000us-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 1,318,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
89,000us-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 384,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
847,000us-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 14,382,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
15,036,000us-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 19,414,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
22,473,000us-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 92,277,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
102,702,000us-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
0us-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 4,255,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast30To59DaysMember
5,491,000us-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
0us-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 5,341,000us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
4,517,000us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Commercial real estate 1,599,000us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
3,049,000us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Automobile 6,971,000hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
10,427,000hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Home equity 16,815,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
20,382,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Residential mortgage 37,179,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
42,009,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
Other consumer 1,032,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
1,086,000us-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 3,016,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
2,981,000us-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 10,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
0us-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 2,315,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
1,536,000us-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 23,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
0us-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 630,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
312,000us-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 405,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
1,167,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
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Due Past 60 To 89 Days [Member] | Commercial real estate Industrial and warehouse [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 15,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
0us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
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Due Past 60 To 89 Days [Member] | Commercial real estate purchased impaired    
Aging Analysis of Loans and Leases    
Commercial real estate 409,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
289,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
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/ hban_AgingAnalysisOfLoansAndLeasesAxis
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Due Past 60 To 89 Days [Member] | Other commercial real estate [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 117,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
1,281,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
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Due Past 60 To 89 Days [Member] | Home equity secured by first-lien other [Member]    
Aging Analysis of Loans and Leases    
Home equity 6,352,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
8,085,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
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/ hban_AgingAnalysisOfLoansAndLeasesAxis
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Due Past 60 To 89 Days [Member] | Home equity secured by junior-lien [Member]    
Aging Analysis of Loans and Leases    
Home equity 10,463,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
12,297,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
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/ hban_AgingAnalysisOfLoansAndLeasesAxis
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Due Past 60 To 89 Days [Member] | Residential mortgage other    
Aging Analysis of Loans and Leases    
Residential mortgage 37,179,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
42,009,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
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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
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/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
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Due Past 60 To 89 Days [Member] | Other consumer other    
Aging Analysis of Loans and Leases    
Other consumer 1,032,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast60To89DaysMember
1,086,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
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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
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Due Past 90 Or More Days [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 32,037,000us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
32,260,000us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Commercial real estate 38,903,000us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
37,181,000us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Automobile 4,910,000hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
5,963,000hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Home equity 38,230,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
66,420,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Residential mortgage 126,469,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
139,379,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
Other consumer 728,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
837,000us-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 16,749,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
18,222,000us-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 3,861,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
4,937,000us-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 11,427,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
9,101,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
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Due Past 90 Or More Days [Member] | Commercial real estate retail properties [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 10,497,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
4,021,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
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Due Past 90 Or More Days [Member] | Commercial real estate Multi family [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 4,063,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
3,337,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
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Due Past 90 Or More Days [Member] | Commercial real estate office [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 1,240,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
4,415,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
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Due Past 90 Or More Days [Member] | Commercial real estate Industrial and warehouse [Member]    
Aging Analysis of Loans and Leases    
Commercial real estate 1,503,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
2,649,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
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Due Past 90 Or More Days [Member] | Commercial real estate purchased impaired    
Aging Analysis of Loans and Leases    
Commercial real estate 16,351,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
18,793,000us-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 5,249,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
3,966,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
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Due Past 90 Or More Days [Member] | Home equity secured by first-lien other [Member]    
Aging Analysis of Loans and Leases    
Home equity 31,197,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
33,014,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
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Due Past 90 Or More Days [Member] | Home equity secured by junior-lien [Member]    
Aging Analysis of Loans and Leases    
Home equity 7,033,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
33,406,000us-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 126,469,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
139,379,000us-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
0us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
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Due Past 90 Or More Days [Member] | Other consumer other    
Aging Analysis of Loans and Leases    
Other consumer 728,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePast90OrMoreDaysMember
837,000us-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 71,607,000us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
58,185,000us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Commercial real estate 44,794,000us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
51,701,000us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Automobile 54,942,000hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
72,662,000hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Home equity 88,841,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
124,311,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Residential mortgage 255,925,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
284,090,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Other consumer 6,015,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
7,414,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
Due Past [Member] | Commercial and industrial owner occupied [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 27,939,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
26,435,000us-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 4,750,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
5,783,000us-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 38,918,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
25,967,000us-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 10,646,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
11,887,000us-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 5,761,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
5,166,000us-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 2,425,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
6,046,000us-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 2,134,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
3,337,000us-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 18,078,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
19,171,000us-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 5,750,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
6,094,000us-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 51,931,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
56,135,000us-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 36,910,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
68,176,000us-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 255,925,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
284,090,000us-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
0us-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 6,015,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastMember
7,414,000us-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
0us-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 20,037,135,000us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
18,974,961,000us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Commercial real estate 5,022,230,000us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
5,145,702,000us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Automobile 7,747,600,000hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
8,617,240,000hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Home equity 8,403,619,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
8,366,604,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Residential mortgage 5,538,782,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
5,546,519,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Other consumer 424,142,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
406,337,000us-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 4,161,964,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
4,228,440,000us-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 16,628,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
17,445,000us-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 15,858,543,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
14,729,076,000us-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 1,345,248,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
1,345,859,000us-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 1,023,952,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
1,085,250,000us-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 945,988,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
974,257,000us-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 513,087,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
510,064,000us-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 17,266,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
19,200,000us-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 1,176,689,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
1,211,072,000us-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 5,102,806,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
5,072,669,000us-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 3,300,813,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
3,293,935,000us-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 5,536,614,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
5,544,607,000us-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 2,168,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
1,912,000us-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 424,091,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
406,286,000us-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 51,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
51,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_CurrentLoansAndLeasesMember
Total Loans And Leases [Member] | Commercial and industrial owner occupied [Member]    
Aging Analysis of Loans and Leases    
Commercial and industrial 4,189,903,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
4,254,875,000us-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 21,378,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
23,228,000us-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 15,897,461,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
14,755,043,000us-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 1,355,894,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
1,357,746,000us-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 1,029,713,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
1,090,416,000us-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 948,413,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
980,303,000us-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 515,221,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
513,401,000us-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 35,344,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
38,371,000us-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 1,182,439,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
1,217,166,000us-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 5,154,737,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
5,128,804,000us-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 3,337,723,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
3,362,111,000us-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 5,792,539,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
5,828,697,000us-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 2,168,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
1,912,000us-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 430,106,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
413,700,000us-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 51,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_LoansAndLeasesMember
51,000us-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 5,935,000us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
[1] 4,937,000us-gaap_LoansReceivableCommercialAndIndustrial
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Commercial real estate 16,351,000us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
[1] 18,793,000us-gaap_LoansReceivableCommercialRealEstate
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Automobile 4,746,000hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
5,703,000hban_LoansAndLeasesReceivableAutomobile
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Home equity 11,132,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
12,159,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Residential mortgage 74,044,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
88,052,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
Other consumer 727,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
837,000us-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 3,861,000us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
4,937,000us-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 2,074,000us-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 16,351,000us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
18,793,000us-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 4,367,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
4,471,000us-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 6,765,000us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
7,688,000us-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 74,044,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
[2] 88,052,000us-gaap_LoansAndLeasesReceivableConsumerMortgage
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
[3]
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
0us-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 727,000us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
837,000us-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
$ 0us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
/ hban_AgingAnalysisOfLoansAndLeasesAxis
= hban_DuePastAndAccruing90OrMoreDaysMember
[1]
Amounts represent accruing purchased impaired loans related to acquisitions. Under the applicable accounting guidance (ASC 310-30), the loans were recorded at fair value upon acquisition and remain in accruing status.
[2]
Includes $53,010 thousand guaranteed by the U.S. government.
[3]
Includes $55,012 thousand guaranteed by the U.S. government.