Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE FINANCIAL INSTRUMENTS - Derivatives Used In Customer Related Activities (Details)

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DERIVATIVE FINANCIAL INSTRUMENTS - Derivatives Used In Customer Related Activities (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Derivative [Line Items]    
Credit risks from interest rate swaps used for trading purposes $ 235 $ 551
Derivative used in trading activity    
Derivative [Line Items]    
Net derivative asset (liability) 42 51
Derivative financial instruments used by Huntington on behalf of customers including offsetting derivatives, notional value $ 44,300 $ 45,100