Annual report pursuant to Section 13 and 15(d)

Loans and Leases and Allowance for Credit Losses (Details 3)

v2.4.1.9
Loans and Leases and Allowance for Credit Losses (Details 3) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded $ 149,316us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment $ 179,944us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
Ending balance of impaired loans with allowance recorded 1,063,224us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment 952,003us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
Related Allowance 78,342us-gaap_ImpairedFinancingReceivableRelatedAllowance 62,880us-gaap_ImpairedFinancingReceivableRelatedAllowance
Ending balance of impaired loans, total 1,212,540us-gaap_ImpairedFinancingReceivableRecordedInvestment 1,131,947us-gaap_ImpairedFinancingReceivableRecordedInvestment
Average balance of impaired loans, total 1,366,329us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment 1,115,320us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
Commercial and industrial owner occupied [Member]    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 13,536us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
5,332us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
Unpaid principal balance of impaired loans with no allowance recorded 13,536us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
[1] 5,373us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
Average balance of impaired loans with no allowance recorded 5,740us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
4,473us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
Interest income recognized on impaired loans with no allowance recorded 205us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
172us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
Ending balance of impaired loans with allowance recorded 44,869us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
40,271us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
Unpaid principal balance of impaired loans with allowance recorded 53,639us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
[1] 52,810us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
[1]
Related Allowance 4,220us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
3,421us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
Average balance of impaired loans with allowance recorded 40,192us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
41,469us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
Interest income recognized on impaired loans with allowance recorded 1,557us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
1,390us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOwnerOccupiedMember
Commercial and industrial purchased impaired    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
Unpaid principal balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
[1] 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
Average balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
Interest income recognized on impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
Ending balance of impaired loans with allowance recorded 23,228us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
35,526us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
Unpaid principal balance of impaired loans with allowance recorded 35,307us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
50,798us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
Related Allowance 3,846us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
2,404us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
Average balance of impaired loans with allowance recorded 32,253us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
47,442us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
Interest income recognized on impaired loans with allowance recorded 6,973us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
4,708us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialPurchasedImpairedMember
Other commercial and industrial [Member]    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 24,309us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
11,884us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
Unpaid principal balance of impaired loans with no allowance recorded 26,858us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
[1] 15,031us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
Average balance of impaired loans with no allowance recorded 7,536us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
13,117us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
Interest income recognized on impaired loans with no allowance recorded 375us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
640us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
Ending balance of impaired loans with allowance recorded 134,279us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
50,829us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
Unpaid principal balance of impaired loans with allowance recorded 162,908us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
[1] 64,497us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
[1]
Related Allowance 6,829us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
2,708us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
Average balance of impaired loans with allowance recorded 88,595us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
59,672us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
Interest income recognized on impaired loans with allowance recorded 2,686us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
3,242us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialOtherMember
Commercial and Industrial [Member]    
Detailed impaired loan information by class    
Loans considered impaired due to status as a TDR 62,737hban_ConsideredImpairedDueToTDRStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
 
Ending balance of impaired loans with no allowance recorded 37,845us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
17,216us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Unpaid principal balance of impaired loans with no allowance recorded 40,394us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
[1] 20,404us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Average balance of impaired loans with no allowance recorded 13,276us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
17,590us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Interest income recognized on impaired loans with no allowance recorded 580us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
812us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Ending balance of impaired loans with allowance recorded 202,376us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
[2] 126,626us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Unpaid principal balance of impaired loans with allowance recorded 251,854us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
[1] 168,105us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
[1]
Related Allowance 14,895us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
8,533us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Average balance of impaired loans with allowance recorded 161,040us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
148,583us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Interest income recognized on impaired loans with allowance recorded 11,216us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
9,340us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Ending balance of impaired loans, total 240,221us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
143,842us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Average balance of impaired loans, total 174,316us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
166,173us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialAndIndustrialMember
Commercial Real Estate Retail Properties [Member]    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 61,915us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
55,773us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
Unpaid principal balance of impaired loans with no allowance recorded 91,627us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
[1] 64,780us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
[1]
Average balance of impaired loans with no allowance recorded 53,121us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
46,764us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
Interest income recognized on impaired loans with no allowance recorded 2,454us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
2,450us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
Ending balance of impaired loans with allowance recorded 37,081us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
72,339us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
Unpaid principal balance of impaired loans with allowance recorded 38,397us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
[1] 93,395us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
[1]
Related Allowance 3,536us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
5,984us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
Average balance of impaired loans with allowance recorded 63,393us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
64,414us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
Interest income recognized on impaired loans with allowance recorded 1,983us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
1,936us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateRetailPropertiesMember
Commercial real estate Multi family [Member]    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
Unpaid principal balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
[1] 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
[1]
Average balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
3,627us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
Interest income recognized on impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
220us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
Ending balance of impaired loans with allowance recorded 17,277us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
13,484us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
Unpaid principal balance of impaired loans with allowance recorded 23,725us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
[1] 15,408us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
[1]
Related Allowance 2,339us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
1,944us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
Average balance of impaired loans with allowance recorded 16,897us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
14,922us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
Interest income recognized on impaired loans with allowance recorded 659us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
651us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateMultiFamilyMember
Commercial real estate office [Member]    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 1,130us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
9,069us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
Unpaid principal balance of impaired loans with no allowance recorded 3,574us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
[1] 13,721us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
[1]
Average balance of impaired loans with no allowance recorded 3,709us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
12,151us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
Interest income recognized on impaired loans with no allowance recorded 311us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
1,161us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
Ending balance of impaired loans with allowance recorded 52,953us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
50,307us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
Unpaid principal balance of impaired loans with allowance recorded 56,268us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
[1] 54,921us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
[1]
Related Allowance 8,399us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
9,927us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
Average balance of impaired loans with allowance recorded 52,831us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
48,113us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
Interest income recognized on impaired loans with allowance recorded 2,381us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
1,808us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOfficeMember
Commercial real estate Industrial and warehouse [Member]    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 3,447us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
9,682us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
Unpaid principal balance of impaired loans with no allowance recorded 3,506us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
[1] 10,803us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
[1]
Average balance of impaired loans with no allowance recorded 5,012us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
10,586us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
Interest income recognized on impaired loans with no allowance recorded 248us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
595us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
Ending balance of impaired loans with allowance recorded 8,888us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
9,162us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
Unpaid principal balance of impaired loans with allowance recorded 10,396us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
[1] 10,561us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
[1]
Related Allowance 720us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
808us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
Average balance of impaired loans with allowance recorded 9,092us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
15,322us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
Interest income recognized on impaired loans with allowance recorded 274us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
541us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateIndustrialAndWarehouseMember
Commercial real estate purchased impaired    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 38,371us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
82,073us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
Unpaid principal balance of impaired loans with no allowance recorded 91,075us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
[1] 154,869us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
[3]
Average balance of impaired loans with no allowance recorded 59,424us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
104,513us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
Interest income recognized on impaired loans with no allowance recorded 11,519us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
10,875us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
Ending balance of impaired loans with allowance recorded 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
Unpaid principal balance of impaired loans with allowance recorded 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
[1] 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
Related Allowance 0us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
0us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
Average balance of impaired loans with allowance recorded 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
Interest income recognized on impaired loans with allowance recorded 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstatePurchasedImpairedMember
Other commercial real estate [Member]    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 6,608us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
6,002us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
Unpaid principal balance of impaired loans with no allowance recorded 6,815us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
[1] 6,924us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
[1]
Average balance of impaired loans with no allowance recorded 6,598us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
7,954us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
Interest income recognized on impaired loans with no allowance recorded 286us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
434us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
Ending balance of impaired loans with allowance recorded 27,963us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
42,544us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
Unpaid principal balance of impaired loans with allowance recorded 33,472us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
[1] 50,960us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
[1]
Related Allowance 3,893us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
16,272us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
Average balance of impaired loans with allowance recorded 241,513us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
36,687us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
Interest income recognized on impaired loans with allowance recorded 1,831us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
1,547us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_CommercialRealEstateOtherMember
Commercial Real Estate [Member]    
Detailed impaired loan information by class    
Loans considered impaired due to status as a TDR 27,423hban_ConsideredImpairedDueToTDRStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
 
Ending balance of impaired loans with no allowance recorded 111,471us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
162,599us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
Unpaid principal balance of impaired loans with no allowance recorded 196,597us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
[1] 251,097us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
[1]
Average balance of impaired loans with no allowance recorded 127,864us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
185,595us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
Interest income recognized on impaired loans with no allowance recorded 14,818us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
15,735us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
Ending balance of impaired loans with allowance recorded 144,162us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
[4] 187,836us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
Unpaid principal balance of impaired loans with allowance recorded 162,258us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
[1] 225,245us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
[1]
Related Allowance 18,887us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
34,935us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
Average balance of impaired loans with allowance recorded 383,726us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
179,458us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
Interest income recognized on impaired loans with allowance recorded 7,128us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
6,483us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
Ending balance of impaired loans, total 255,633us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
350,435us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
Average balance of impaired loans, total 511,590us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
365,053us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateMember
Automobile Loan [Member]    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
Unpaid principal balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
Average balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
Interest income recognized on impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
Ending balance of impaired loans with allowance recorded 30,612us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
[5] 37,084us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
[5]
Unpaid principal balance of impaired loans with allowance recorded 32,483us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
[1],[5] 38,758us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
[1],[5]
Related Allowance 1,531us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
[5] 682us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
[5]
Average balance of impaired loans with allowance recorded 34,637us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
[5] 39,861us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
[5]
Interest income recognized on impaired loans with allowance recorded 2,637us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
[5] 2,955us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
[5]
Ending balance of impaired loans, total 30,612us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
37,084us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
Average balance of impaired loans, total 34,637us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
39,861us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_AutomobileLoanMember
Home equity secured by first-lien other [Member]    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
Unpaid principal balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
Average balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
Interest income recognized on impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
Ending balance of impaired loans with allowance recorded 145,566us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
[5] 110,024us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
[5]
Unpaid principal balance of impaired loans with allowance recorded 157,978us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
[1],[5] 116,846us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
[1],[5]
Related Allowance 8,296us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
[5] 2,396us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
[5]
Average balance of impaired loans with allowance recorded 126,602us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
[5] 96,184us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
[5]
Interest income recognized on impaired loans with allowance recorded 5,496us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
[5] 4,116us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredByFirstLienOtherMember
[5]
Home equity secured by junior-lien [Member]    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
Unpaid principal balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
Average balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
Interest income recognized on impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
Ending balance of impaired loans with allowance recorded 164,880us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
[5] 98,957us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
[5]
Unpaid principal balance of impaired loans with allowance recorded 208,118us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
[1],[5] 143,967us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
[1],[5]
Related Allowance 17,731us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
[5] 5,607us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
[5]
Average balance of impaired loans with allowance recorded 132,279us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
[5] 65,986us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
[5]
Interest income recognized on impaired loans with allowance recorded 6,379us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
[5] 3,379us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_HomeEquitySecuredBySecondLienMember
[5]
Home Equity [Member]    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
Unpaid principal balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
Average balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
Interest income recognized on impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
Ending balance of impaired loans with allowance recorded 310,446us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
[5] 208,981us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
[5]
Unpaid principal balance of impaired loans with allowance recorded 366,096us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
[1],[5] 260,813us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
[5]
Related Allowance 26,027us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
[5] 8,003us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
[5]
Average balance of impaired loans with allowance recorded 258,881us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
[5] 162,170us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
[5]
Interest income recognized on impaired loans with allowance recorded 11,875us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
[5] 7,495us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
[5]
Ending balance of impaired loans, total 310,446us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
208,981us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
Average balance of impaired loans, total 258,881us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
162,170us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
Residential mortgage other    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
Unpaid principal balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
Average balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
Interest income recognized on impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
Ending balance of impaired loans with allowance recorded 369,577us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
[5] 387,937us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
[5]
Unpaid principal balance of impaired loans with allowance recorded 415,280us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
[1],[5] 427,924us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
[1],[5]
Related Allowance 16,535us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
[5] 10,555us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
[5]
Average balance of impaired loans with allowance recorded 381,745us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
[5] 377,530us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
[5]
Interest income recognized on impaired loans with allowance recorded 11,594us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
[5] 11,752us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgageOtherMember
[5]
Residential mortgage purchased impaired    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
Unpaid principal balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
[1] 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
Average balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
Interest income recognized on impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
Ending balance of impaired loans with allowance recorded 1,912us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
2,498us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
Unpaid principal balance of impaired loans with allowance recorded 3,096us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
3,681us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
Related Allowance 8us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
36us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
Average balance of impaired loans with allowance recorded 2,281us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
2,285us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
Interest income recognized on impaired loans with allowance recorded 574us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
331us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_ResidentialMortgagePurchasedImpairedMember
Residential Mortgage [Member]    
Detailed impaired loan information by class    
Amount of TDRs guaranteed by the U.S. government 24,470hban_TDRGovernmentGuarantee
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
 
Ending balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
Unpaid principal balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
[1] 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
Average balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
Interest income recognized on impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
Ending balance of impaired loans with allowance recorded 371,489us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
[5],[6] 390,435us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
Unpaid principal balance of impaired loans with allowance recorded 418,376us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
[1],[5] 431,605us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
Related Allowance 16,543us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
[5] 10,591us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
Average balance of impaired loans with allowance recorded 384,026us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
[5] 379,815us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
Interest income recognized on impaired loans with allowance recorded 12,168us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
[5] 12,083us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
Ending balance of impaired loans, total 371,489us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
390,435us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
Average balance of impaired loans, total 384,026us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
379,815us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
Other consumer other    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
Unpaid principal balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
Average balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
Interest income recognized on impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
Ending balance of impaired loans with allowance recorded 4,088us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
[5] 1,041us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
[5]
Unpaid principal balance of impaired loans with allowance recorded 4,209us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
[1],[5] 1,041us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
[1],[5]
Related Allowance 214us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
[5] 136us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
[5]
Average balance of impaired loans with allowance recorded 2,796us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
[5] 2,111us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
[5]
Interest income recognized on impaired loans with allowance recorded 202us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
[5] 116us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerOtherMember
[5]
Other consumer purchased impaired    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
129us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
Unpaid principal balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
[1] 219us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
Average balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
137us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
Interest income recognized on impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
17us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
Ending balance of impaired loans with allowance recorded 51us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
Unpaid principal balance of impaired loans with allowance recorded 123us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
Related Allowance 245us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
0us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
Average balance of impaired loans with allowance recorded 83us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
Interest income recognized on impaired loans with allowance recorded 15us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerPurchasedImpairedMember
Other Consumer loan [Member]    
Detailed impaired loan information by class    
Ending balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
129us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
Unpaid principal balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
[1] 219us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
Average balance of impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
137us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
Interest income recognized on impaired loans with no allowance recorded 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
17us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
Ending balance of impaired loans with allowance recorded 4,139us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
[5] 1,041us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
Unpaid principal balance of impaired loans with allowance recorded 4,332us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
[1],[5] 1,041us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
Related Allowance 459us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
[5] 136us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
Average balance of impaired loans with allowance recorded 2,879us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
[5] 2,111us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
Interest income recognized on impaired loans with allowance recorded 217us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
[5] 116us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
Ending balance of impaired loans, total 4,139us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
1,170us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
Average balance of impaired loans, total $ 2,879us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
$ 2,248us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= hban_OtherConsumerLoanMember
[1]
The differences between the ending balance and unpaid principal balance amounts represent partial charge-offs.
[2]
At December 31, 2014, $62,737 thousand of the $202,376 thousand C&I loans with an allowance recorded were considered impaired due to their status as a TDR. At December 31, 2013, $43,805 thousand of the $126,626 thousand C&I loans with an allowance recorded were considered impaired due to their status as a TDR.
[3]
Represents decrease in value due to passage of time, including the impact from both regularly scheduled loan principal payments and partial loan paydowns.
[4]
At December 31, 2014, $27,423 thousand of the $144,162 thousand CRE loans with an allowance recorded were considered impaired due to their status as a TDR. At December 31, 2013, $24,805 thousand of the $187,836 thousand CRE loans with an allowance recorded were considered impaired due to their status as a TDR.
[5]
All automobile, home equity, residential mortgage, and other consumer impaired loans included in these tables are considered impaired due to their status as a TDR.
[6]
At December 31, 2014, $24,470 thousand of the $371,489 thousand residential mortgage loans with an allowance recorded were guaranteed by the U.S. government. At December 31, 2013, $49,225 thousand of the $390,435 thousand residential mortgage loans with an allowance recorded were guaranteed by the U.S. government.