Quarterly report pursuant to Section 13 or 15(d)

Available-for-Sale and Other Securities (OTTI) (Details 5)

v2.4.1.9
Available-for-Sale and Other Securities (OTTI) (Details 5) (Debt Securities [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Debt Securities [Member]
   
Unrealized OTTI recognized in OCI on debt securities held by Huntington    
Balance, beginning of period $ 30,869hban_OtherThanTemporaryImpairmentCreditLossesRecognizedInOtherComprehensiveIncomeLossCreditLossesOnDebtSecuritiesHeld
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_DebtSecuritiesMember
$ 30,869hban_OtherThanTemporaryImpairmentCreditLossesRecognizedInOtherComprehensiveIncomeLossCreditLossesOnDebtSecuritiesHeld
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_DebtSecuritiesMember
Reductions from sales 0us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_DebtSecuritiesMember
0us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_DebtSecuritiesMember
Credit losses not previous recognized 0us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_DebtSecuritiesMember
0us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_DebtSecuritiesMember
Additional credit losses 0us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_DebtSecuritiesMember
0us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_DebtSecuritiesMember
Balance, end of period $ 30,869hban_OtherThanTemporaryImpairmentCreditLossesRecognizedInOtherComprehensiveIncomeLossCreditLossesOnDebtSecuritiesHeld
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_DebtSecuritiesMember
$ 30,869hban_OtherThanTemporaryImpairmentCreditLossesRecognizedInOtherComprehensiveIncomeLossCreditLossesOnDebtSecuritiesHeld
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_DebtSecuritiesMember