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

Commitments and Contingent Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Commercial [Member]
Contract amounts of various commitments to extend credit
Contract amount represents credit risk	$ 10,978,254	$ 11,181,522
Consumer [Member]
Contract amounts of various commitments to extend credit
Contract amount represents credit risk	7,809,875	7,579,632
Commercial Real Estate [Member]
Contract amounts of various commitments to extend credit
Contract amount represents credit risk	953,874	908,112
Standby Letters of Credit [Member]
Contract amounts of various commitments to extend credit
Contract amount represents credit risk	$ 474,224	$ 497,457