Annual report pursuant to Section 13 and 15(d)

Segment Reporting (Details)

v2.4.1.9
Segment Reporting (Details) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
segment
market
Dec. 31, 2013
Dec. 31, 2012
Business Segment Financial Information                      
Net interest income $ 473,252,000us-gaap_InterestIncomeExpenseNet $ 466,335,000us-gaap_InterestIncomeExpenseNet $ 460,048,000us-gaap_InterestIncomeExpenseNet $ 437,506,000us-gaap_InterestIncomeExpenseNet $ 430,649,000us-gaap_InterestIncomeExpenseNet $ 424,852,000us-gaap_InterestIncomeExpenseNet $ 424,937,000us-gaap_InterestIncomeExpenseNet $ 424,170,000us-gaap_InterestIncomeExpenseNet $ 1,837,141,000us-gaap_InterestIncomeExpenseNet $ 1,704,608,000us-gaap_InterestIncomeExpenseNet $ 1,710,524,000us-gaap_InterestIncomeExpenseNet
Provision for credit losses 2,494,000us-gaap_ProvisionForLoanAndLeaseLosses 24,480,000us-gaap_ProvisionForLoanAndLeaseLosses 29,385,000us-gaap_ProvisionForLoanAndLeaseLosses 24,630,000us-gaap_ProvisionForLoanAndLeaseLosses 24,331,000us-gaap_ProvisionForLoanAndLeaseLosses 11,400,000us-gaap_ProvisionForLoanAndLeaseLosses 24,722,000us-gaap_ProvisionForLoanAndLeaseLosses 29,592,000us-gaap_ProvisionForLoanAndLeaseLosses 80,989,000us-gaap_ProvisionForLoanAndLeaseLosses 90,045,000us-gaap_ProvisionForLoanAndLeaseLosses 147,388,000us-gaap_ProvisionForLoanAndLeaseLosses
Noninterest income 233,278,000us-gaap_NoninterestIncome 247,349,000us-gaap_NoninterestIncome 250,067,000us-gaap_NoninterestIncome 248,485,000us-gaap_NoninterestIncome 249,892,000us-gaap_NoninterestIncome 253,767,000us-gaap_NoninterestIncome 251,919,000us-gaap_NoninterestIncome 256,618,000us-gaap_NoninterestIncome 979,179,000us-gaap_NoninterestIncome 1,012,196,000us-gaap_NoninterestIncome 1,106,321,000us-gaap_NoninterestIncome
Noninterest expense 483,271,000us-gaap_NoninterestExpense 480,318,000us-gaap_NoninterestExpense 458,636,000us-gaap_NoninterestExpense 460,121,000us-gaap_NoninterestExpense 446,009,000us-gaap_NoninterestExpense 423,336,000us-gaap_NoninterestExpense 445,865,000us-gaap_NoninterestExpense 442,793,000us-gaap_NoninterestExpense 1,882,346,000us-gaap_NoninterestExpense 1,758,003,000us-gaap_NoninterestExpense 1,835,876,000us-gaap_NoninterestExpense
Income taxes 57,151,000us-gaap_IncomeTaxExpenseBenefit 53,870,000us-gaap_IncomeTaxExpenseBenefit 57,475,000us-gaap_IncomeTaxExpenseBenefit 52,097,000us-gaap_IncomeTaxExpenseBenefit 52,029,000us-gaap_IncomeTaxExpenseBenefit 65,047,000us-gaap_IncomeTaxExpenseBenefit 55,269,000us-gaap_IncomeTaxExpenseBenefit 55,129,000us-gaap_IncomeTaxExpenseBenefit 220,593,000us-gaap_IncomeTaxExpenseBenefit 227,474,000us-gaap_IncomeTaxExpenseBenefit 202,291,000us-gaap_IncomeTaxExpenseBenefit
Net Income (Loss) Attributable to Parent 163,614,000us-gaap_NetIncomeLoss 155,016,000us-gaap_NetIncomeLoss 164,619,000us-gaap_NetIncomeLoss 149,143,000us-gaap_NetIncomeLoss 158,172,000us-gaap_NetIncomeLoss 178,836,000us-gaap_NetIncomeLoss 151,000,000us-gaap_NetIncomeLoss 153,274,000us-gaap_NetIncomeLoss 632,392,000us-gaap_NetIncomeLoss 641,282,000us-gaap_NetIncomeLoss 631,290,000us-gaap_NetIncomeLoss
Segment Disclosure of Assets and Deposit                      
Assets 66,298,010,000us-gaap_Assets       59,467,174,000us-gaap_Assets       66,298,010,000us-gaap_Assets 59,467,174,000us-gaap_Assets  
Deposits 51,732,151,000us-gaap_Deposits       47,506,718,000us-gaap_Deposits       51,732,151,000us-gaap_Deposits 47,506,718,000us-gaap_Deposits  
Segment Reporting (Textuals) [Abstract]                      
Number of reporting segments                 5hban_NumberOfReportingSegments    
Number of Regional and Commercial Banking markets                 11hban_NumberOfRegionalAndCommercialBankingMarkets    
Retail & Business Banking [Member]                      
Business Segment Financial Information                      
Net interest income                 912,992,000us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
902,526,000us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
941,844,000us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
Provision for credit losses                 75,529,000us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
137,978,000us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
135,102,000us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
Noninterest income                 409,746,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
398,065,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
380,820,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
Noninterest expense                 982,288,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
964,193,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
973,691,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
Income taxes                 92,722,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
69,447,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
74,855,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
Net Income (Loss) Attributable to Parent                 172,199,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
128,973,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
139,016,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
Segment Disclosure of Assets and Deposit                      
Assets 15,146,857,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
      14,440,869,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
      15,146,857,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
14,440,869,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
 
Deposits 29,350,255,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
      28,293,993,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
      29,350,255,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
28,293,993,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RetailAndBusinessBanking1Member
 
Commercial Banking [Member]                      
Business Segment Financial Information                      
Net interest income                 306,434,000us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
281,461,000us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
294,333,000us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
Provision for credit losses                 31,521,000us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
27,464,000us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
4,602,000us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
Noninterest income                 209,238,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
200,573,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
197,191,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
Noninterest expense                 249,300,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
254,629,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
248,157,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
Income taxes                 82,198,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
69,979,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
83,568,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
Net Income (Loss) Attributable to Parent                 152,653,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
129,962,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
155,197,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
Segment Disclosure of Assets and Deposit                      
Assets 15,043,477,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
      12,410,339,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
      15,043,477,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
12,410,339,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
 
Deposits 11,184,566,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
      10,187,891,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
      11,184,566,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
10,187,891,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_CommercialBankingMember
 
AFCRE [Member]                      
Business Segment Financial Information                      
Net interest income                 379,363,000us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
366,508,000us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
369,376,000us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
Provision for credit losses                 (52,843,000)us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
(82,269,000)us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
(16,557,000)us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
Noninterest income                 26,628,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
46,819,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
91,314,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
Noninterest expense                 156,715,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
156,469,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
160,434,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
Income taxes                 105,742,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
118,694,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
110,885,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
Net Income (Loss) Attributable to Parent                 196,377,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
220,433,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
205,928,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
Segment Disclosure of Assets and Deposit                      
Assets 16,027,910,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
      14,081,112,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
      16,027,910,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
14,081,112,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
 
Deposits 1,377,921,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
      1,170,518,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
      1,377,921,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
1,170,518,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_AutomobileFinanceAndCommercialRealEstateMember
 
RBHPCG [Member]                      
Business Segment Financial Information                      
Net interest income                 101,839,000us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
105,862,000us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
104,329,000us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
Provision for credit losses                 4,893,000us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
(5,376,000)us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
6,044,000us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
Noninterest income                 173,550,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
186,430,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
181,650,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
Noninterest expense                 236,634,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
236,895,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
253,901,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
Income taxes                 11,852,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
21,271,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
9,112,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
Net Income (Loss) Attributable to Parent                 22,010,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
39,502,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
16,922,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
Segment Disclosure of Assets and Deposit                      
Assets 3,871,020,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
      3,736,790,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
      3,871,020,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
3,736,790,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
 
Deposits 6,727,892,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
      6,094,135,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
      6,727,892,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
6,094,135,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_RBHPCGMember
 
Home Lending [Member]                      
Business Segment Financial Information                      
Net interest income                 58,015,000us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
51,839,000us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
54,980,000us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
Provision for credit losses                 21,889,000us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
12,249,000us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
18,198,000us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
Noninterest income                 69,899,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
106,006,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
165,189,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
Noninterest expense                 136,374,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
141,489,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
132,302,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
Income taxes                 (10,622,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
1,437,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
24,384,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
Net Income (Loss) Attributable to Parent                 (19,727,000)us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
2,670,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
45,285,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
Segment Disclosure of Assets and Deposit                      
Assets 3,949,247,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
      3,742,527,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
      3,949,247,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
3,742,527,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
 
Deposits 326,841,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
      329,511,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
      326,841,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
329,511,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_HomeLendingMember
 
Treasury/Other [Member]                      
Business Segment Financial Information                      
Net interest income                 78,498,000us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
(3,588,000)us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
(54,338,000)us-gaap_InterestIncomeExpenseNet
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
Provision for credit losses                 0us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
(1,000)us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
(1,000)us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
Noninterest income                 90,118,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
74,303,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
90,157,000us-gaap_NoninterestIncome
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
Noninterest expense                 121,035,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
4,328,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
67,391,000us-gaap_NoninterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
Income taxes                 (61,299,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
(53,354,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
(100,513,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
Net Income (Loss) Attributable to Parent                 108,880,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
119,742,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
68,942,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
Segment Disclosure of Assets and Deposit                      
Assets 12,259,499,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
      11,055,537,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
      12,259,499,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
11,055,537,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
 
Deposits $ 2,764,676,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
      $ 1,430,670,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
      $ 2,764,676,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember
$ 1,430,670,000us-gaap_Deposits
/ us-gaap_StatementBusinessSegmentsAxis
= hban_OthersMember