Annual report pursuant to Section 13 and 15(d)

Benefit Plans (Details 4)

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Benefit Plans (Details 4) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Defined Contribution Plan Disclosure      
Defined Contribution Plan, Cost Recognized $ 31,110us-gaap_DefinedContributionPlanCostRecognized $ 18,238us-gaap_DefinedContributionPlanCostRecognized $ 16,926us-gaap_DefinedContributionPlanCostRecognized
Market Value - Amount of Huntington Common Stock 135,533hban_MarketValueAmountOfHuntingtonCommonStock 131,476hban_MarketValueAmountOfHuntingtonCommonStock  
Shares of Huntington Stock 12,883,333hban_SharesOfHuntingtonStock 13,624,429hban_SharesOfHuntingtonStock  
Dividends On Huntington Stock $ 2,694hban_DividendsOnHuntingtonStock $ 2,567hban_DividendsOnHuntingtonStock