OTHER DEDUCTIONS, NET - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Other deductions, Net [Line Items] | ||||
| Amortization of intangibles (intellectual property and customer relationships) | $ 204 | $ 219 | $ 613 | $ 677 |
| AspenTech | ||||
| Other deductions, Net [Line Items] | ||||
| Amortization of intangibles (intellectual property and customer relationships) | $ 13 | $ 65 | ||