Quarterly report pursuant to Section 13 or 15(d)

Benefit Plans (Details 1)

v2.4.1.9
Benefit Plans (Details 1) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Summary of plan assets investments    
Fair value of plan assets $ 658,763,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets $ 653,013,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Fair value of plan assets, Percentage 100.00%hban_FairValueOfPlanAssetsPercentage 100.00%hban_FairValueOfPlanAssetsPercentage
Other [Member]    
Summary of plan assets investments    
Fair value of plan assets 121,035,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_CashEquivalentsOtherMember 		118,970,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_CashEquivalentsOtherMember
Fair value of plan assets, Percentage 18.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_CashEquivalentsOtherMember 		18.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_CashEquivalentsOtherMember
Huntington funds - money market [Member]    
Summary of plan assets investments    
Fair value of plan assets 5,387,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_MoneyMarketFundsMember 		16,136,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_MoneyMarketFundsMember
Fair value of plan assets, Percentage 1.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_MoneyMarketFundsMember 		2.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_MoneyMarketFundsMember
Corporate Obligations [Member]    
Summary of plan assets investments    
Fair value of plan assets 223,489,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CorporateDebtSecuritiesMember 		218,077,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CorporateDebtSecuritiesMember
Fair value of plan assets, Percentage 34.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CorporateDebtSecuritiesMember 		33.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CorporateDebtSecuritiesMember
U.S. Government Obligations [Member]    
Summary of plan assets investments    
Fair value of plan assets 62,162,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_UsGovernmentObligationsMember 		62,627,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_UsGovernmentObligationsMember
Fair value of plan assets, Percentage 9.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_UsGovernmentObligationsMember 		10.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_UsGovernmentObligationsMember
Mutual funds - fixed income    
Summary of plan assets investments    
Fair value of plan assets 37,118,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_OtherFixedIncomeMutualFundsMember 		34,761,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_OtherFixedIncomeMutualFundsMember
Fair value of plan assets, Percentage 6.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_OtherFixedIncomeMutualFundsMember 		5.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_OtherFixedIncomeMutualFundsMember
U.S. Government Agencies [Member]    
Summary of plan assets investments    
Fair value of plan assets 7,630,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_USTreasuryAndGovernmentMember 		7,445,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_USTreasuryAndGovernmentMember
Fair value of plan assets, Percentage 1.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_USTreasuryAndGovernmentMember 		1.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_USTreasuryAndGovernmentMember
Mutual Funds - equities    
Summary of plan assets investments    
Fair value of plan assets 153,288,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_OtherEquityMutualFundsMember 		147,191,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_OtherEquityMutualFundsMember
Fair value of plan assets, Percentage 23.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_OtherEquityMutualFundsMember 		23.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_OtherEquityMutualFundsMember
Huntington funds - equity funds [Member]    
Summary of plan assets investments    
Fair value of plan assets 37,794,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquityFundsMember 		37,920,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquityFundsMember
Fair value of plan assets, Percentage 6.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquityFundsMember 		6.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquityFundsMember
ExchangeTradedFundsMember    
Summary of plan assets investments    
Fair value of plan assets 7,017,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_ExchangeTradedFundsMember 		6,840,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_ExchangeTradedFundsMember
Fair value of plan assets, Percentage 1.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_ExchangeTradedFundsMember 		1.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_ExchangeTradedFundsMember
Limited Partnerships [Member]    
Summary of plan assets investments    
Fair value of plan assets $ 3,843,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_LimitedpartnershipsmemberMember 		$ 3,046,000us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_LimitedpartnershipsmemberMember
Fair value of plan assets, Percentage 1.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_LimitedpartnershipsmemberMember 		1.00%hban_FairValueOfPlanAssetsPercentage
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= hban_LimitedpartnershipsmemberMember