Annual report pursuant to Section 13 and 15(d)

VARIABLE INTEREST ENTITIES - Narrative (Details)

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VARIABLE INTEREST ENTITIES - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Mar. 31, 2024
Variable Interest Entity [Line Items]        
Loans retained by Huntington       $ 128
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration] Other assets Other assets    
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Income or Comprehensive Income [Extensible Enumeration] Other noninterest income Other noninterest income Other noninterest income  
Consolidated VIE | Asset-backed securities        
Variable Interest Entity [Line Items]        
Aggregate loans       1,600
Consolidated VIE | Consumer portfolio | Automobile        
Variable Interest Entity [Line Items]        
Aggregate loans       $ 1,600