OTHER DEDUCTIONS, NET - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Other deductions, Net [Line Items] | ||||
| Amortization of intangibles (intellectual property and customer relationships) | $ 205 | $ 229 | $ 409 | $ 457 |
| AspenTech | ||||
| Other deductions, Net [Line Items] | ||||
| Amortization of intangibles (intellectual property and customer relationships) | $ 26 | $ 52 | ||