Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

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Indicates line item in statement of income or comprehensive income that includes gain (loss) from derivative.

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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.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4E

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DERIVATIVE ASSETS AND DERIVATIVE LIABILITIES, Income Statement Location (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	$ 3	$ 6	$ 7	$ 17
Interest rate \| Principal transactions
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives, location			Principal transactions	Principal transactions
Interest rate \| Other revenues \| Other
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives, location			Revenue from contract with customer	Revenue from contract with customer
Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	11	(20)	$ 3	$ (56)
Gain (loss) on derivatives, location			Revenue from contract with customer	Revenue from contract with customer
Other
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	$ 0	$ 1	$ 0	$ 0
Gain (loss) on derivatives, location			Principal transactions	Principal transactions