v3.26.1
BANK DEPOSITS, Narrative (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Sep. 30, 2025
Bank Deposits [Line Items]    
Bank deposits $ 62,423 $ 58,897
Raymond James & Associates, Inc.    
Bank Deposits [Line Items]    
Related party deposits 29,830 26,560
Private Client Group clients    
Bank Deposits [Line Items]    
Bank deposits $ 12,490 $ 13,470