BUSINESS COMBINATIONS - Pro Forma (Details) - Veritex and Cadence - USD ($) $ in Millions |
3 Months Ended | |
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Mar. 31, 2026 |
Mar. 31, 2025 |
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| Business Combination [Line Items] | ||
| Acquisition-related expenses | $ 321 | |
| Net income attributable to Huntington | 485 | $ 665 |
| Net interest income | ||
| Business Combination [Line Items] | ||
| Pro forma revenue | 2,042 | 1,914 |
| Other noninterest income | ||
| Business Combination [Line Items] | ||
| Pro forma revenue | $ 739 | $ 594 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after tax, of pro forma income (loss) of combined entity as if acquisition date of business combination occurred as of beginning of period. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of pro forma revenue of combined entity as if acquisition date of business combination occurred as of beginning of period. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of expense for acquisition-related cost incurred to effect business combination. Includes, but is not limited to, finder's fee; advisory, legal, accounting, valuation, and other professional and consulting fees; and general administrative cost, including cost of maintaining internal acquisition department. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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