Annual report pursuant to Section 13 and 15(d)

Parent Company Financial Statements (Details)

v2.4.1.9
Parent Company Financial Statements (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
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Assets                          
Cash and cash equivalents $ 1,220,565,000us-gaap_CashAndCashEquivalentsAtCarryingValue       $ 1,001,132,000us-gaap_CashAndCashEquivalentsAtCarryingValue       $ 1,220,565,000us-gaap_CashAndCashEquivalentsAtCarryingValue $ 1,001,132,000us-gaap_CashAndCashEquivalentsAtCarryingValue     $ 1,115,968,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Accrued interest receivable and other assets 1,807,208,000us-gaap_OtherAssets       1,609,876,000us-gaap_OtherAssets       1,807,208,000us-gaap_OtherAssets 1,609,876,000us-gaap_OtherAssets      
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      
LIABILITIES AND SHAREHOLDERS' EQUITY                          
Short-term borrowings 2,397,101,000us-gaap_ShortTermBorrowings       2,352,143,000us-gaap_ShortTermBorrowings       2,397,101,000us-gaap_ShortTermBorrowings 2,352,143,000us-gaap_ShortTermBorrowings      
Long-term borrowings 4,335,962,000us-gaap_LongTermDebt       2,458,272,000us-gaap_LongTermDebt       4,335,962,000us-gaap_LongTermDebt 2,458,272,000us-gaap_LongTermDebt      
Accrued expenses and other liabilities 1,504,626,000us-gaap_OtherLiabilities       1,059,888,000us-gaap_OtherLiabilities       1,504,626,000us-gaap_OtherLiabilities 1,059,888,000us-gaap_OtherLiabilities      
Liabilities 59,969,840,000us-gaap_Liabilities       53,377,021,000us-gaap_Liabilities       59,969,840,000us-gaap_Liabilities 53,377,021,000us-gaap_Liabilities      
Shareholders' equity 6,328,170,000us-gaap_StockholdersEquity       6,090,153,000us-gaap_StockholdersEquity       6,328,170,000us-gaap_StockholdersEquity 6,090,153,000us-gaap_StockholdersEquity   5,778,500,000us-gaap_StockholdersEquity 5,416,121,000us-gaap_StockholdersEquity
Total liabilities and shareholders' equity 66,298,010,000us-gaap_LiabilitiesAndStockholdersEquity       59,467,174,000us-gaap_LiabilitiesAndStockholdersEquity       66,298,010,000us-gaap_LiabilitiesAndStockholdersEquity 59,467,174,000us-gaap_LiabilitiesAndStockholdersEquity      
Interest from                          
Other                 126,004,000us-gaap_NoninterestIncomeOtherOperatingIncome 138,825,000us-gaap_NoninterestIncomeOtherOperatingIncome 137,707,000us-gaap_NoninterestIncomeOtherOperatingIncome    
Expense                          
Personnel costs                 1,048,775,000us-gaap_LaborAndRelatedExpense 1,001,637,000us-gaap_LaborAndRelatedExpense 988,193,000us-gaap_LaborAndRelatedExpense    
Other                 174,810,000us-gaap_OtherNoninterestExpense 141,385,000us-gaap_OtherNoninterestExpense 199,219,000us-gaap_OtherNoninterestExpense    
Total 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 (loss) before income taxes and equity in undistributed net income of subsidiaries 220,765,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 208,886,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 222,094,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 201,240,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 210,201,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 243,883,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 206,269,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 208,403,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 852,985,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 868,756,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 833,581,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments    
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    
Increase (decrease) in undistributed net income of:                          
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    
Operating activities                          
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    
Adjustments to reconcile net income to net cash provided by operating activities                          
Depreciation and amortization                 332,832,000us-gaap_DepreciationAndAmortization 281,545,000us-gaap_DepreciationAndAmortization 274,572,000us-gaap_DepreciationAndAmortization    
Net cash provided by (used for) operating activities                 888,786,000us-gaap_NetCashProvidedByUsedInOperatingActivities 1,013,245,000us-gaap_NetCashProvidedByUsedInOperatingActivities 1,002,130,000us-gaap_NetCashProvidedByUsedInOperatingActivities    
Investing activities                          
Net cash provided by (used for) investing activities                 (5,004,781,000)us-gaap_NetCashProvidedByUsedInInvestingActivities (4,240,333,000)us-gaap_NetCashProvidedByUsedInInvestingActivities (1,082,978,000)us-gaap_NetCashProvidedByUsedInInvestingActivities    
Financing activities                          
Payment of borrowings                 118,698,000us-gaap_ProceedsFromRepaymentsOfShortTermDebt 854,558,000us-gaap_ProceedsFromRepaymentsOfShortTermDebt (939,979,000)us-gaap_ProceedsFromRepaymentsOfShortTermDebt    
Dividends paid on preferred stock                 (31,854,000)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock (31,869,000)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock (31,719,000)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock    
Dividends paid on common stock                 (166,935,000)us-gaap_PaymentsOfDividendsCommonStock (150,608,000)us-gaap_PaymentsOfDividendsCommonStock (137,616,000)us-gaap_PaymentsOfDividendsCommonStock    
Dividends Paid                     (169,335,000)us-gaap_PaymentsOfDividends    
Repurchase of common stock                 (334,429,000)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue (124,995,000)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue (148,881,000)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue    
Proceeds from Issuance of Common Stock                 2,597,000us-gaap_ProceedsFromIssuanceOfCommonStock 0us-gaap_ProceedsFromIssuanceOfCommonStock 0us-gaap_ProceedsFromIssuanceOfCommonStock    
Repurchase of Warrant to the Treasury                 0hban_RepurchaseOfWarrantConvertibleToCommonStock 0hban_RepurchaseOfWarrantConvertibleToCommonStock 0hban_RepurchaseOfWarrantConvertibleToCommonStock    
Other, net                 4,635,000us-gaap_ProceedsFromPaymentsForOtherFinancingActivities (225,000)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities (3,237,000)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities    
Net cash provided by (used for) financing activities                 4,335,428,000us-gaap_NetCashProvidedByUsedInFinancingActivities 2,965,414,000us-gaap_NetCashProvidedByUsedInFinancingActivities 227,686,000us-gaap_NetCashProvidedByUsedInFinancingActivities    
Cash and Cash Equivalents, Period Increase (Decrease)                 219,433,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (261,674,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 146,838,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease    
Cash and cash equivalents at beginning of period       1,001,132,000us-gaap_CashAndCashEquivalentsAtCarryingValue         1,001,132,000us-gaap_CashAndCashEquivalentsAtCarryingValue   1,262,806,000us-gaap_CashAndCashEquivalentsAtCarryingValue   1,115,968,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of period 1,220,565,000us-gaap_CashAndCashEquivalentsAtCarryingValue       1,001,132,000us-gaap_CashAndCashEquivalentsAtCarryingValue       1,220,565,000us-gaap_CashAndCashEquivalentsAtCarryingValue 1,001,132,000us-gaap_CashAndCashEquivalentsAtCarryingValue     1,115,968,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental disclosures:                          
Interest paid                 131,488,000us-gaap_InterestPaid 155,832,000us-gaap_InterestPaid 231,897,000us-gaap_InterestPaid    
Parent Company [Member]                          
Assets                          
Cash and cash equivalents 662,768,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      966,065,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      662,768,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		966,065,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		921,471,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Due from The Huntington National Bank 276,851,000us-gaap_DueFromBanks
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      246,841,000us-gaap_DueFromBanks
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      276,851,000us-gaap_DueFromBanks
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		246,841,000us-gaap_DueFromBanks
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		     
Due from non-bank subsidiaries 51,129,000hban_DueFromNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      57,747,000hban_DueFromNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      51,129,000hban_DueFromNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		57,747,000hban_DueFromNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		     
Investment in The Huntington National Bank 6,073,408,000hban_InvestmentInBank
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      5,537,582,000hban_InvestmentInBank
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      6,073,408,000hban_InvestmentInBank
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		5,537,582,000hban_InvestmentInBank
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		     
Investment in non-bank subsidiaries 509,114,000hban_InvestmentInNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      587,388,000hban_InvestmentInNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      509,114,000hban_InvestmentInNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		587,388,000hban_InvestmentInNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		     
Accrued interest receivable and other assets 279,366,000us-gaap_OtherAssets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      286,036,000us-gaap_OtherAssets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      279,366,000us-gaap_OtherAssets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		286,036,000us-gaap_OtherAssets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		     
Assets 7,852,636,000us-gaap_Assets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      7,681,659,000us-gaap_Assets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      7,852,636,000us-gaap_Assets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		7,681,659,000us-gaap_Assets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		     
LIABILITIES AND SHAREHOLDERS' EQUITY                          
Long-term borrowings 1,046,105,000us-gaap_LongTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      1,034,266,000us-gaap_LongTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      1,046,105,000us-gaap_LongTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		1,034,266,000us-gaap_LongTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		     
Accrued expenses and other liabilities 478,361,000us-gaap_OtherLiabilities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      557,240,000us-gaap_OtherLiabilities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      478,361,000us-gaap_OtherLiabilities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		557,240,000us-gaap_OtherLiabilities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		     
Liabilities 1,524,466,000us-gaap_Liabilities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      1,591,506,000us-gaap_Liabilities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      1,524,466,000us-gaap_Liabilities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		1,591,506,000us-gaap_Liabilities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		     
Shareholders' equity 6,328,170,000us-gaap_StockholdersEquity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		[1]       6,090,153,000us-gaap_StockholdersEquity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		[1]       6,328,170,000us-gaap_StockholdersEquity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		[1] 6,090,153,000us-gaap_StockholdersEquity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		[1]      
Total liabilities and shareholders' equity 7,852,636,000us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      7,681,659,000us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      7,852,636,000us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		7,681,659,000us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		     
Dividends from                          
The Huntington National Bank                 244,000,000hban_DividendsFromBank
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		0hban_DividendsFromBank
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		0hban_DividendsFromBank
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Non-bank subsidiaries                 27,773,000hban_DividendFromNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		55,473,000hban_DividendFromNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		36,450,000hban_DividendFromNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Interest from                          
The Huntington National Bank                 3,906,000hban_InterestFromBank
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		6,598,000hban_InterestFromBank
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		38,617,000hban_InterestFromBank
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Non-bank subsidiaries                 2,613,000hban_InterestFromNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		3,129,000hban_InterestFromNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		5,420,000hban_InterestFromNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Other                 2,994,000us-gaap_NoninterestIncomeOtherOperatingIncome
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		2,148,000us-gaap_NoninterestIncomeOtherOperatingIncome
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		1,409,000us-gaap_NoninterestIncomeOtherOperatingIncome
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Total Income                 281,286,000hban_Income
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		67,348,000hban_Income
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		81,896,000hban_Income
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Expense                          
Personnel costs                 53,359,000us-gaap_LaborAndRelatedExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		52,846,000us-gaap_LaborAndRelatedExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		42,745,000us-gaap_LaborAndRelatedExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Interest on borrowings                 17,031,000us-gaap_InterestExpenseBorrowings
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		20,739,000us-gaap_InterestExpenseBorrowings
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		28,926,000us-gaap_InterestExpenseBorrowings
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Other                 52,662,000us-gaap_OtherNoninterestExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		36,728,000us-gaap_OtherNoninterestExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		35,415,000us-gaap_OtherNoninterestExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Total Expense                 123,052,000us-gaap_NoninterestExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		110,313,000us-gaap_NoninterestExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		107,086,000us-gaap_NoninterestExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Income (loss) before income taxes and equity in undistributed net income of subsidiaries                 158,234,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(42,965,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(25,190,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Income taxes                 (62,897,000)us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(22,298,000)us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(12,565,000)us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Income before equity in undistributed net income of subsidiaries                 221,131,000hban_IncomeBeforeEquityInUndistributedNetIncomeOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(20,667,000)hban_IncomeBeforeEquityInUndistributedNetIncomeOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(12,625,000)hban_IncomeBeforeEquityInUndistributedNetIncomeOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Increase (decrease) in undistributed net income of:                          
The Huntington National Bank                 414,049,000hban_IncreaseDecreaseInUndistributedNetIncomeOfBank
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		692,392,000hban_IncreaseDecreaseInUndistributedNetIncomeOfBank
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		653,615,000hban_IncreaseDecreaseInUndistributedNetIncomeOfBank
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Non-bank subsidiaries                 (2,788,000)hban_IncreaseDecreaseInUndistributedNetIncomeOfNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(30,443,000)hban_IncreaseDecreaseInUndistributedNetIncomeOfNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(9,700,000)hban_IncreaseDecreaseInUndistributedNetIncomeOfNonBankSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Net Income (Loss) Attributable to Parent                 632,392,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		641,282,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		631,290,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Statement of Income and Comprehensive Income [Abstract]                          
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent                 (8,283,000)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(63,192,000)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		22,946,000us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Comprehensive Income, Net of Tax, Attributable to Parent                 624,109,000us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		578,090,000us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		654,236,000us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Operating activities                          
Net Income (Loss) Attributable to Parent                 632,392,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		641,282,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		631,290,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Adjustments to reconcile net income to net cash provided by operating activities                          
Equity in undistributed net income of subsidiaries                 (411,261,000)hban_EquityInUndistributedNetIncomeOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(718,144,000)hban_EquityInUndistributedNetIncomeOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(688,149,000)hban_EquityInUndistributedNetIncomeOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Depreciation and amortization                 548,000us-gaap_DepreciationAndAmortization
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		513,000us-gaap_DepreciationAndAmortization
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		265,000us-gaap_DepreciationAndAmortization
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Other, net                 26,685,000us-gaap_OtherNoncashIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		15,965,000us-gaap_OtherNoncashIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		60,446,000us-gaap_OtherNoncashIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Net cash provided by (used for) operating activities                 248,364,000us-gaap_NetCashProvidedByUsedInOperatingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(60,384,000)us-gaap_NetCashProvidedByUsedInOperatingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		3,852,000us-gaap_NetCashProvidedByUsedInOperatingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Investing activities                          
Repayments from subsidiaries                 9,250,000hban_RepaymentsFromSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		285,792,000hban_RepaymentsFromSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		591,923,000hban_RepaymentsFromSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Advances to subsidiaries                 (32,350,000)hban_AdvancesToSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(249,050,000)hban_AdvancesToSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(36,126,000)hban_AdvancesToSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Payments To Acquire Businesses Net Of Cash Acquired                 (13,452,000)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Net cash provided by (used for) investing activities                 (36,552,000)us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		36,742,000us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		555,797,000us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Financing activities                          
Payment of borrowings                 0us-gaap_ProceedsFromRepaymentsOfShortTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(50,000,000)us-gaap_ProceedsFromRepaymentsOfShortTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(236,885,000)us-gaap_ProceedsFromRepaymentsOfShortTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Proceeds from Issuance of Long-term Debt                 0us-gaap_ProceedsFromIssuanceOfLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		400,000,000us-gaap_ProceedsFromIssuanceOfLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		0us-gaap_ProceedsFromIssuanceOfLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Dividends Paid                 (198,789,000)us-gaap_PaymentsOfDividends
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(182,476,000)us-gaap_PaymentsOfDividends
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		     
Repurchase of common stock                 (334,429,000)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(124,995,000)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(148,881,000)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Proceeds from Issuance of Common Stock                 2,597,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		0us-gaap_ProceedsFromIssuanceOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		0us-gaap_ProceedsFromIssuanceOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Other, net                 15,512,000us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		25,707,000us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(1,031,000)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Net cash provided by (used for) financing activities                 (515,109,000)us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		68,236,000us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		(556,132,000)us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Cash and Cash Equivalents, Period Increase (Decrease)                 (303,297,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		44,594,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		3,517,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Cash and cash equivalents at beginning of period       966,065,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      921,471,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		966,065,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		921,471,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		917,954,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Cash and cash equivalents at end of period 662,768,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      966,065,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		      662,768,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		966,065,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		921,471,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
Supplemental disclosures:                          
Interest paid                 $ 21,321,000us-gaap_InterestPaid
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		$ 20,739,000us-gaap_InterestPaid
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		$ 28,926,000us-gaap_InterestPaid
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember 		   
[1]
(1) See Consolidated Statements of Changes in Shareholders’ Equity.