v3.25.2
BANK DEPOSITS, Summary of Bank Deposits (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Sep. 30, 2024
Balance    
Money market and savings accounts $ 33,289 $ 32,304
Interest-bearing demand deposits 21,651 20,570
Certificates of deposit 1,785 2,612
Non-interest-bearing demand deposits 524 524
Total bank deposits $ 57,249 $ 56,010
Weighted-average rate    
Money market and savings accounts 1.63% 2.18%
Interest-bearing demand deposits 4.09% 4.56%
Certificates of deposit 4.31% 4.70%
Non-interest-bearing demand deposits 0.00% 0.00%
Total bank deposits 2.65% 3.18%