BUSINESS SEGMENT INFORMATION - Narrative (Details) $ in Millions	9 Months Ended
Sep. 30, 2026 USD ($)
Segment Reporting [Line Items]
Number of reportable segments not disclosed flag	The Company has identified the following reportable segments: Auto, CBB, Commercial Banking, CIB, and Wealth Management.
CIB
Segment Reporting [Line Items]
Minimum annual revenue to service corporations	$ 500

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.

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+ Details