Annual report pursuant to Section 13 and 15(d)

SHARE-BASED COMPENSATION - Schedule of Assumptions (Details)

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SHARE-BASED COMPENSATION - Schedule of Assumptions (Details) - $ / shares
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Assumptions      
Risk-free interest rate 2.13% 1.69% 0.79%
Expected dividend yield 2.57% 2.61% 2.83%
Expected volatility of Huntington’s common stock 29.00% 32.30% 35.00%
Expected option term (years) 6 years 6 months 5 years 5 years 6 months
Weighted-average grant date fair value per share $ 2.57 $ 2.13 $ 1.71