LEASES, Operating Lease Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022
Leases [Abstract]
ROU assets (included in Other assets)	$ 560	$ 480
Lease liabilities (included in Other payables)	$ 539	$ 482
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities	Other Liabilities