COLLATERALIZED AGREEMENTS AND FINANCINGS, Repurchase Agreements (Details) - Maturity overnight and continuous - USD ($) $ in Millions |
Jun. 30, 2025 |
Sep. 30, 2024 |
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| Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
| Securities sold under agreements to repurchase | $ 228 | $ 402 |
| Total | 883 | 938 |
| Government and agency obligations | ||
| Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
| Securities sold under agreements to repurchase | 107 | 206 |
| Agency MBS and agency CMOs | ||
| Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
| Securities sold under agreements to repurchase | 121 | 196 |
| Equity securities | ||
| Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
| Securities loaned | $ 655 | $ 536 |
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- Definition Amount, before effects of master netting arrangements, of funds outstanding borrowed in the form of a financial asset repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same financial asset at a date certain for a specified price. Includes repurchase-to-maturity transactions and liabilities not subject to a master netting arrangement. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount, before effects of master netting arrangements, of financial assets loaned to entities in exchange for collateral and funds outstanding borrowed in the form of a financial asset repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same financial assets at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount, before effects of master netting arrangements, of financial assets loaned to entities in exchange for collateral. Includes liabilities not subject to a master netting arrangement and financial assets transferred other than securities that qualify as secured borrowings. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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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/exampleRef
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