Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE FINANCIAL INSTRUMENTS - Financial Assets And Liabilities That Are Offset (Details)

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DERIVATIVE FINANCIAL INSTRUMENTS - Financial Assets And Liabilities That Are Offset (Details)
$ in Millions
3 Months Ended
Mar. 31, 2024
USD ($)
group
Dec. 31, 2023
USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Number of primary groups | group 2  
Aggregate credit risk, net of collateral $ 255 $ 238
Investment securities and cash collateral pledged by Huntington 181  
Investment securities and cash collateral pledged to Huntington $ 616