Annual report pursuant to Section 13 and 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
Dec. 31, 2014
Dec. 31, 2013
Accrued income and other assets [Member]    
Asset derivatives included in accrued income and other assets    
Interest rate contracts designated as hedging instruments $ 53,114us-gaap_InterestRateFairValueHedgeAssetAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
$ 49,998us-gaap_InterestRateFairValueHedgeAssetAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
Interest rate contracts not designated as hedging instruments 183,610us-gaap_InterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
169,047us-gaap_InterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
Foreign exchange contracts not designated as hedging instruments 32,798us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
28,499us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
Commodities contracts not designated as hedging instruments 180,218us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
4,278us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
Total derivative assets 449,740us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedIncomeAndOtherAssetsMember
251,822us-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 12,648us-gaap_InterestRateFairValueHedgeLiabilityAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
25,321us-gaap_InterestRateFairValueHedgeLiabilityAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
Interest rate contracts not designated as hedging instruments 110,627us-gaap_InterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
99,247us-gaap_InterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
Foreign exchange contracts not designated as hedging instruments 29,754us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
18,909us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
Commodities contracts not designated as hedging instruments 179,180us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
3,838us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
Total derivative liabilities $ 332,209us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember
$ 147,315us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_BalanceSheetLocationAxis
= hban_AccruedExpensesAndOtherLiabilitiesMember