Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details)

v3.10.0.1
DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2018
USD ($)
group
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
Derivative [Line Items]          
Fair value hedging adjustments     $ (135)    
Increase (decrease) to net interest income due to derivative adjustment $ (11) $ 3 (25) $ 20  
Derivative Liability 220   220   $ 86
Purchase of interest rate caps and derivative financial instruments, notional value 5,727   5,727   8,375
Credit risks from interest rate swaps used for trading purposes $ 115   $ 115   119
Additional information about interest rate swaps used in asset and liability management activities [Table Text Block]    
The following table presents additional information about the interest rate swaps used in Huntington’s asset and liability management activities at September 30, 2018 and December 31, 2017.
 
September 30, 2018
 
 
 
 
 
 
 
Weighted-Average Rate
(dollar amounts in millions)
Notional Value
 
Average Maturity (years)
 
Fair Value
 
Receive
 
Pay
Asset conversion swaps
 
 
 
 
 
 
 
 
 
Receive fixed—generic
$
12

 
1.5

 
$
—

 
2.20
%
 
2.16
%
Liability conversion swaps
 
 
 
 
 
 
 
 
 
Receive fixed—generic
5,715

 
2.5

 
(50
)
 
2.08

 
2.26

Total swap portfolio at September 30, 2018
$
5,727

 
2.5

 
$
(50
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2017
 
 
 
 
 
 
 
Weighted-Average Rate
(dollar amounts in millions)
Notional Value
 
Average Maturity (years)
 
Fair Value
 
Receive
 
Pay
Liability conversion swaps
 
 
 
 
 
 
 
 
 
Receive fixed—generic
$
8,375

 
2.5

 
$
(99
)
 
1.56
%
 
1.44
%
Total swap portfolio at December 31, 2017
$
8,375

 
2.5

 
$
(99
)
 
 
 
 
   
Number of primary groups | group 2        
Aggregate credit risk, net of collateral $ 17   $ 17   30
Investment securities and cash collateral pledged by Huntington 72   72    
Investment securities and cash collateral pledged to Huntington 246   $ 246    
liability conversion swaps (notional value) 2,900        
Liability conversion swap (adjusted basis) 149        
Swap          
Derivative [Line Items]          
Additional information about interest rate swaps used in asset and liability management activities [Table Text Block]     4000000    
Derivative used in trading activity          
Derivative [Line Items]          
Net derivative asset (liability) 100   $ 100   88
Derivative financial instruments used by Huntington on behalf of customers including offsetting derivatives, notional value 25,000   25,000   22,000
Fair Value Hedging          
Derivative [Line Items]          
Purchase of interest rate caps and derivative financial instruments, notional value 5,715   5,715   8,375
Cash Flow Hedging          
Derivative [Line Items]          
Purchase of interest rate caps and derivative financial instruments, notional value $ 12   $ 12   $ 0