Huntington Bancshares Incorporated Annual report pursuant to Section 13 and 15(d)

Loans sales and securitizations (Details Textuals) (USD $)	3 Months Ended			12 Months Ended
	Sep. 30, 2012	Mar. 31, 2012	Sep. 30, 2011	Dec. 31, 2012 Residential Mortgage [Member]	Dec. 31, 2011 Residential Mortgage [Member]	Dec. 31, 2010 Residential Mortgage [Member]	Dec. 31, 2012 Automobile Loan [Member]	Dec. 31, 2011 Automobile Loan [Member]	Dec. 31, 2010 Automobile Loan [Member]
Loans sales and securitizations (Textuals) [Abstract]
Total servicing fees included in mortgage banking income				$ 46,200,000	$ 49,100,000	$ 48,100,000
Total servicing income on sold automobile loans							8,700,000	2,000,000	2,500,000
Total of automobile loans transferred in securitization transactions	1,000,000,000	1,300,000,000	1,000,000,000				2,300,000,000
Gain or loss from sale of automobile loans in securitizations and sales							42,300,000
Net proceeds received in securitization transaction							2,400,000,000
Unpaid principal balance of third party serviced loans				15,600,000,000	15,900,000,000	15,900,000,000	2,500,000,000	900,000,000	100,000,000
Total of automobile loans sold, but not securitized							$ 200,000,000