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BUSINESS SEGMENTS INFORMATION - Narrative (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 11, 2023 | Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total stock compensation expense |  |  |  |  |  |  |  |  |  |  | $ 265 | $ 260 | $ 271
Acquisition/divestiture fees and related costs |  |  |  |  |  |  |  |  |  |  | 214 | 96 | 69
Amortization of acquisition-related inventory step-up |  |  |  |  |  |  |  |  |  |  | 0 | 231 | 0
Divestiture losses |  |  |  |  |  |  |  |  |  |  |  | 48 |
Russia business exit |  |  |  |  |  |  |  |  |  |  |  | 0 | 47
Mark-to-market gain |  |  |  |  |  |  |  |  |  |  |  |  | 24
Net sales |  | $ 4,855 | $ 4,553 | $ 4,432 | $ 4,175 | $ 4,619 | $ 4,380 | $ 4,376 | $ 4,117 |  | 18,016 | 17,492 | 15,165
Property, plant and equipment |  | 2,871 |  |  |  | 2,807 |  |  |  | $ 2,363 | 2,871 | 2,807 | 2,363
National Instruments |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Mark-to-market gain |  |  |  |  |  |  |  |  |  |  |  |  | 56
U.S. Plans |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 7,481 | 7,091 | 6,327
Property, plant and equipment |  | $ 1,498 |  |  |  | $ 1,474 |  |  |  | 1,261 | 1,498 | 1,474 | 1,261
China |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 1,829 | 1,901 | 1,804
AspenTech |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total stock compensation expense |  |  |  |  |  |  |  |  |  |  | 35 |  |
National Instruments |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total stock compensation expense |  |  |  |  |  |  |  |  |  |  | 12 | 96 |
Acquisition/divestiture fees and related costs |  |  |  |  |  |  |  |  |  | 110 | 255 | 205 | 84
Net sales | $ 1,700 |  |  |  |  |  |  |  |  |  |  |  |
National Instruments | National Instruments |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition/divestiture fees and related costs |  |  |  |  |  |  |  |  |  | $ 88 |  |  |
Restructuring Charges | AspenTech |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total stock compensation expense |  |  |  |  |  |  |  |  |  |  | 22 |  |
Restructuring Charges | National Instruments |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total stock compensation expense |  |  |  |  |  |  |  |  |  |  | 3 | 58 |
Operating Profit | National Instruments |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition/divestiture fees and related costs |  |  |  |  |  |  |  |  |  |  | $ 42 | $ 109 | $ 15

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