Huntington Bancshares Incorporated Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments (Credit Derivatives) (OtherCreditDerivativesMember, USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
OtherCreditDerivativesMember
Notional Amount Of Derivatives [Abstract]
DerivativeAssetNotionalAmount	$ 446.3	$ 456.7
CreditRiskDerivativesAtFairValueNetAbstract
CreditRiskDerivativeAssetsAtFairValue	$ 9.3	$ 7.2