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RESTRUCTURING COSTS - Narrative (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Sep. 30, 2025 USD ($) position facilty | Sep. 30, 2024 USD ($) facilty position | Sep. 30, 2023 USD ($) facilty position | Sep. 30, 2026 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring costs | $ 136 | $ 228 | $ 72 |
Number of positions eliminated | position | 2,100 | 2,250 | 700 |
Total number of facilities exited | facilty | 13 | 22 | 10 |
Costs incurred related to restructuring actions | $ 26 | $ 16 | $ 20 |
Corporate and other |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring costs | 41 | $ 51 | $ 14 |
Corporate and other | National Instruments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring costs | 3 |  |  |
Corporate and other | AspenTech |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring costs | $ 22 |  |  |
Forecast |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring costs, expected future cost |  |  |  | $ 100

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