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v3.25.3

DERIVATIVE FINANCIAL INSTRUMENTS - Financial Assets and Liabilities that are Offset (Details) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2025 USD ($) group | Dec. 31, 2024 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
Number of primary groups | group | 2 |
Aggregate credit risk, net of collateral | $ 28 | $ 192
Investment securities and cash collateral pledged by Huntington | 111 |
Investment securities and cash collateral pledged to Huntington | $ 150 |

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