Quarterly report [Sections 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, 2025
Dec. 31, 2024
Derivative [Line Items]    
Credit risks from interest rate swaps used for trading purposes $ 77 $ 76
Derivative used in trading activity    
Derivative [Line Items]    
Net derivative asset (liability) 57 72
Derivative financial instruments used by Huntington on behalf of customers including offsetting derivatives, notional value $ 48,300 $ 45,200