BANK DEPOSITS, Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2024	Sep. 30, 2023
Bank Deposits [Line Items]
Bank deposits	$ 54,843	$ 54,199
Raymond James & Associates, Inc.
Bank Deposits [Line Items]
Related party deposit liabilities	23,410	25,360
Private Client Group clients
Bank Deposits [Line Items]
Bank deposits	$ 14,540	$ 13,590

The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.12)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

Name:	us-gaap_Deposits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant