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BANK DEPOSITS, Maturities by Fiscal Year of Certificates of Deposit (Details) - USD ($)
$ in Millions
Sep. 30, 2024
Sep. 30, 2023
Deposits [Abstract]    
2025 $ 2,227  
2026 322  
2027 30  
2028 18  
2029 15  
Total certificates of deposit $ 2,612 $ 2,831