v3.26.1
BANK DEPOSITS, Maturities by Fiscal Year of Certificates of Deposit (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Sep. 30, 2025
Deposits [Abstract]    
Remainder of 2026 $ 1,140  
2027 635  
2028 408  
2029 62  
2030 50  
Thereafter 25  
Certificates of deposit $ 2,320 $ 1,937