Quarterly report pursuant to Section 13 or 15(d)

Loans and Leases And Allowance For Credit Losses (Details 4)

v2.4.1.9
Loans and Leases And Allowance For Credit Losses (Details 4) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Dec. 31, 2013
Portion of ALLL ending balance        
Attributable to loans purchased with deteriorated credit quality $ 2,369us-gaap_FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality $ 4,099us-gaap_FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality    
Attributable to loans individually evaluated for impairment 84,862us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 74,243us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1    
Attributable to loans collectively evaluated for impairment 517,895us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment 526,854us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment    
Total ALLL balance, end of period 605,126us-gaap_LoansAndLeasesReceivableAllowance 605,196us-gaap_LoansAndLeasesReceivableAllowance 631,918us-gaap_LoansAndLeasesReceivableAllowance 647,870us-gaap_LoansAndLeasesReceivableAllowance
Portion of loans and leases ending balance        
Purchased with deteriorated credit quality 58,941us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality 63,562us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality    
Individually evaluated for impairment 1,257,869us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment 1,148,978us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment    
Collectively evaluated for impairment 46,378,822us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment 46,443,186us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment    
Total loans evaluated for impairment 47,695,632us-gaap_LoansAndLeasesReceivableGrossCarryingAmount 47,655,726us-gaap_LoansAndLeasesReceivableGrossCarryingAmount    
Commercial and Industrial [Member]        
Portion of ALLL ending balance        
Attributable to loans purchased with deteriorated credit quality 2,103us-gaap_FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
3,846us-gaap_FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
   
Attributable to loans individually evaluated for impairment 18,475us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
11,049us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
   
Attributable to loans collectively evaluated for impairment 263,995us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
272,100us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
   
Total ALLL balance, end of period 284,573us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
286,995us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
266,979us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
265,801us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Portion of loans and leases ending balance        
Purchased with deteriorated credit quality 21,378us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
23,228us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
   
Individually evaluated for impairment 320,088us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
216,993us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
   
Collectively evaluated for impairment 19,767,276us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
18,792,925us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
   
Total loans evaluated for impairment 20,108,742us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
19,033,146us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
   
Commercial Real Estate [Member]        
Portion of ALLL ending balance        
Attributable to loans purchased with deteriorated credit quality 0us-gaap_FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
0us-gaap_FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
   
Attributable to loans individually evaluated for impairment 21,175us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
18,887us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
   
Attributable to loans collectively evaluated for impairment 79,577us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
83,952us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
   
Total ALLL balance, end of period 100,752us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
102,839us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
160,306us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
162,557us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
Portion of loans and leases ending balance        
Purchased with deteriorated credit quality 35,344us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
38,371us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
   
Individually evaluated for impairment 205,452us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
217,262us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
   
Collectively evaluated for impairment 4,826,228us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
4,941,770us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
   
Total loans evaluated for impairment 5,067,024us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
5,197,403us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
   
Automobile Loan [Member]        
Portion of ALLL ending balance        
Attributable to loans purchased with deteriorated credit quality 0us-gaap_FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
0us-gaap_FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
   
Attributable to loans individually evaluated for impairment 1,588us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
1,531us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
   
Attributable to loans collectively evaluated for impairment 35,537us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
31,935us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
   
Total ALLL balance, end of period 37,125us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
33,466us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
25,178us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
31,053us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
Portion of loans and leases ending balance        
Purchased with deteriorated credit quality 0us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
0us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
   
Individually evaluated for impairment 30,159us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
30,612us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
   
Collectively evaluated for impairment 7,772,383us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
8,659,290us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
   
Total loans evaluated for impairment 7,802,542us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
8,689,902us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
   
Home Equity [Member]        
Portion of ALLL ending balance        
Attributable to loans purchased with deteriorated credit quality 0us-gaap_FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
0us-gaap_FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
   
Attributable to loans individually evaluated for impairment 29,921us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
26,027us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
   
Attributable to loans collectively evaluated for impairment 80,359us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
70,386us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
   
Total ALLL balance, end of period 110,280us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
96,413us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
113,177us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
111,131us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
Portion of loans and leases ending balance        
Purchased with deteriorated credit quality 0us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
0us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
   
Individually evaluated for impairment 323,416us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
310,446us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
   
Collectively evaluated for impairment 8,169,044us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
8,180,469us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
   
Total loans evaluated for impairment 8,492,460us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
8,490,915us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
   
Residential Mortgage [Member]        
Portion of ALLL ending balance        
Attributable to loans purchased with deteriorated credit quality 7us-gaap_FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
8us-gaap_FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
   
Attributable to loans individually evaluated for impairment 13,596us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
16,535us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
   
Attributable to loans collectively evaluated for impairment 41,777us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
30,668us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
   
Total ALLL balance, end of period 55,380us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
47,211us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
39,068us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
39,577us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
Portion of loans and leases ending balance        
Purchased with deteriorated credit quality 2,168us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
1,912us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
   
Individually evaluated for impairment 373,709us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
369,577us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
   
Collectively evaluated for impairment 5,418,830us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
5,459,120us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
   
Total loans evaluated for impairment 5,794,707us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
5,830,609us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
   
Other Consumer loan [Member]        
Portion of ALLL ending balance        
Attributable to loans purchased with deteriorated credit quality 259us-gaap_FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
245us-gaap_FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
   
Attributable to loans individually evaluated for impairment 107us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
214us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
   
Attributable to loans collectively evaluated for impairment 16,650us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
37,813us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
   
Total ALLL balance, end of period 17,016us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
38,272us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
27,210us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
37,751us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
Portion of loans and leases ending balance        
Purchased with deteriorated credit quality 51us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
51us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
   
Individually evaluated for impairment 5,045us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
4,088us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
   
Collectively evaluated for impairment 425,061us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
409,612us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
   
Total loans evaluated for impairment $ 430,157us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
$ 413,751us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember