COMMITMENTS, CONTINGENCIES AND GUARANTEES, Summary of Off-Balance Sheet Risks (Details) - USD ($) $ in Millions	Sep. 30, 2022	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
SBL and other consumer lines of credit	$ 33,641	$ 17,515
Commercial lines of credit	3,792	2,075
Unfunded lending commitments	1,255	548
Standby letters of credit	$ 94	$ 22