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

Short Term Borrowings (Details)

Short Term Borrowings (Details) (USD $)	12 Months Ended
Short Term Borrowings (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Short-term Debt [Line Items]
Short Term Borrowings	$ 2,397,101,000us-gaap_ShortTermBorrowings	$ 2,352,143,000us-gaap_ShortTermBorrowings
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Member]
Short-term Debt [Line Items]
Short Term Borrowings	1,058,096,000	548,605,000
Weighted average interest rate at year-end	0.08%	0.06%		0.15%
Maximum amount outstanding at month-end during the year	1,491,350,000	787,127,000	1,590,082,000
Average amount outstanding during the year	987,156,000	692,481,000	1,293,348,000
Weighted average interest rate during the year	0.07%	0.08%		0.14%
OtherBorrowings [Member]
Short-term Debt [Line Items]
Short Term Borrowings	14,005,000	3,538,000
Weighted average interest rate at year-end	1.11%	2.59%		1.98%
Maximum amount outstanding at month-end during the year	56,124,000	19,497,000	26,071,000
Average amount outstanding during the year	20,797,000	7,815,000	16,983,000
Weighted average interest rate during the year	1.63%	1.79%		1.36%
Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Short Term Borrowings	1,325,000,000	1,800,000,000
Maximum amount outstanding at month-end during the year	2,375,000,000	1,800,000	1,000,000
Average amount outstanding during the year	$ 1,753,045	$ 702,262	$ 286,530
Weighted average interest rate during the year	0.06%	0.04%	0.17%
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Weighted Average Interest Rate	0.14%	0.02%	0.03%