BANK DEPOSITS, Bank Deposits by Insured and Uninsured (Details) - USD ($) $ in Millions |
Mar. 31, 2026 |
Sep. 30, 2025 |
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| Deposits [Abstract] | ||
| FDIC-insured bank deposits | $ 52,188 | $ 49,117 |
| Bank deposits exceeding FDIC insurance limit | 10,235 | 9,780 |
| Total bank deposits | $ 62,423 | $ 58,897 |
| FDIC-insured bank deposits as a % of total bank deposits | 84.00% | 83.00% |
| Related Party Transaction [Line Items] | ||
| Bank deposits exceeding FDIC insurance limit | $ 10,235 | $ 9,780 |
| Related party | ||
| Deposits [Abstract] | ||
| Bank deposits exceeding FDIC insurance limit | 1,500 | 1,240 |
| Related Party Transaction [Line Items] | ||
| Bank deposits exceeding FDIC insurance limit | $ 1,500 | $ 1,240 |
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- Definition Deposits, At Or Above FDIC Insurance Limit No definition available.
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- Definition Deposits, Below FDIC Insurance Limit No definition available.
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- Definition Deposits, Below FDIC Insurance Limit, Percentage No definition available.
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- Definition 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
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- References No definition available.
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- 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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