v3.25.2
Derivative Instruments and Hedging Activities - Offsetting Assets and Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Sep. 30, 2024
Fair Value of Assets    
Gross amount recognized $ 16 $ 22
Gross amount eligible for offsetting (10) (12)
Net amount 6 10
Fair Value of Liabilities    
Gross amount recognized 3,630 3,450
Gross amount eligible for offsetting (10) (12)
Net amount $ 3,620 $ 3,438