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

DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Management (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Derivative [Line Items]
Total notional value	$ 10,800,000
Fair Value Hedges
Derivative [Line Items]
Total notional value	7,475,000
Cash Flow Hedges
Derivative [Line Items]
Total notional value	3,325,000
Loans
Derivative [Line Items]
Total notional value	3,325,000
Loans \| Fair Value Hedges
Derivative [Line Items]
Total notional value	0
Loans \| Cash Flow Hedges
Derivative [Line Items]
Total notional value	3,325,000
Deposits
Derivative [Line Items]
Total notional value	0
Deposits \| Fair Value Hedges
Derivative [Line Items]
Total notional value	0
Deposits \| Cash Flow Hedges
Derivative [Line Items]
Total notional value	0
Subordinated notes
Derivative [Line Items]
Total notional value	950,000
Subordinated notes \| Fair Value Hedges
Derivative [Line Items]
Total notional value	950,000
Subordinated notes \| Cash Flow Hedges
Derivative [Line Items]
Total notional value	0
Other long-term debt
Derivative [Line Items]
Total notional value	6,525,000
Other long-term debt \| Fair Value Hedges
Derivative [Line Items]
Total notional value	6,525,000
Other long-term debt \| Cash Flow Hedges
Derivative [Line Items]
Total notional value	$ 0