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NONINTEREST INCOME - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Trust and investment services fees
Disaggregation of Revenue [Line Items]
Trailing commission income	$ 4	$ 4	$ 11	$ 12

- 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.

+ References + Details