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

Derivative Financial Instruments (Details Textuals)

Derivative Financial Instruments (Details Textuals) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Derivative Financial Instruments (Textuals) [Abstract]
Credit risks from interest rate swaps used for trading purposes					$ 296,100,000
Purchase of interest rate caps and derivative financial instruments, notional value	600,000,000		600,000,000
Total notional amount corresponds to trading assets, fair value	2,100,000		2,100,000
MSR hedging gains (losses)	100,000	15,400,000	(23,500,000)	33,000,000
Gains (losses) related to derivative instruments Included in total MSR	100,000		(23,500,000)	33,000,000
Additional Derivative Financial Instruments (Textuals) [Abstract]
Aggregate credit risk, net of collateral					17,400,000
Increase (decrease) to net interest income due to derivative adjustment		28,000,000
Swap [Member]
Derivative Financial Instruments (Textuals) [Abstract]
Total derivative liabilities	400,000		400,000
Derivative used in trading activity [Member]
Derivative Financial Instruments (Textuals) [Abstract]
Net derivative asset (liability)					63,400,000
Derivative financial instruments used by Huntington on behalf of customers including offsetting derivatives, notional value					12,900,000,000
Derivative used in Mortgage Banking Activities [Member]
Derivative Financial Instruments (Textuals) [Abstract]
Net derivative asset (liability)	(1,939,000)		(1,939,000)		11,752,000
Purchase of interest rate caps and derivative financial instruments, notional value					2,300,000,000
Gains (losses) related to derivative instruments Included in total MSR		15,400,000
Total derivative liabilities	$ 10,326,000		$ 10,326,000		$ 2,191,000