Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments (Hedging instruments) (Details 1)

v2.4.1.9
Derivative Financial Instruments (Hedging instruments) (Details 1) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Accrued income and other assets [Member]    
Asset derivatives included in accrued income and other assets    
Interest rate contracts designated as hedging instruments $ 92,019us-gaap_InterestRateFairValueHedgeAssetAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
$ 53,114us-gaap_InterestRateFairValueHedgeAssetAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
Interest rate contracts not designated as hedging instruments 223,830us-gaap_InterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
183,610us-gaap_InterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
Foreign exchange contracts not designated as hedging instruments 59,029us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
32,798us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
Commodities contracts not designated as hedging instruments 194,859us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
180,218us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
Total derivative assets 569,737us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
449,740us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
Accrued expenses and other liabilities [Member]    
Liability derivatives included in accrued expenses and other liabilities    
Interest rate contracts designated as hedging instruments 442us-gaap_InterestRateFairValueHedgeLiabilityAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
12,648us-gaap_InterestRateFairValueHedgeLiabilityAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
Interest rate contracts not designated as hedging instruments 149,186us-gaap_InterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
110,627us-gaap_InterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
Foreign exchange contracts not designated as hedging instruments 50,228us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
29,754us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
Commodities contracts not designated as hedging instruments 192,572us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
179,180us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
Total derivative liabilities $ 392,428us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
$ 332,209us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember