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FAIR VALUE, Changes in Fair Value for Level 3 Liabilities (Details) - Derivative liabilities
$ in Millions
12 Months Ended
Sep. 30, 2025
USD ($)
Changes in Level 3 curring fair value measurements, liabilities [Roll Forward]  
Fair value beginning of year $ 0
Total gains/(losses) included in earnings (2)
Purchases and contributions 0
Sales and distributions 0
Transfers:  
Into Level 3 0
Out of Level 3 0
Fair value end of year (2)
Unrealized gains/(losses) for the year included in earnings for instruments held at the end of the year $ (2)