BANK DEPOSITS, Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2023	Sep. 30, 2022
Bank Deposits [Line Items]
Interest-bearing demand deposits	$ 16,661	$ 5,286
Raymond James & Associates, Inc.
Bank Deposits [Line Items]
Related party deposit liabilities	27,920	$ 38,710
Private Client Group clients
Bank Deposits [Line Items]
Interest-bearing demand deposits	$ 11,230