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 |