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ACQUISITIONS AND DIVESTITURES - Narrative (Details) - USD ($) $ in Millions |  |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |
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Mar. 12, 2025 | Nov. 15, 2024 | Oct. 11, 2023 | Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2022 | Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023 | Sep. 30, 2023 | Sep. 30, 2024
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Settlement of AspenTech share awards |  |  |  |  |  |  | $ 76 | $ 0 |  |  |
Net sales |  |  |  | $ 4,432 | $ 4,376 |  | 8,608 | 8,493 |  |  |
Acquisition/divestiture fees and related costs |  |  |  | 144 | 5 |  | 157 | 85 |  |  |
Purchase price of businesses, net of cash acquired |  |  |  |  |  |  | 36 | 8,342 |  |  |
Goodwill |  |  |  | 17,999 |  |  | 17,999 |  |  |  | $ 18,067
Gain on subordinated interest |  |  |  |  | 0 |  | 0 | 79 |  |  |
Loss on divestiture of business |  |  |  | 0 | 39 |  | 0 |  |  |  |
AspenTech |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total consideration paid in cash at closing | $ 7,200 |  |  |  |  |  |  |  |  |  |
Business combination, accrued deal fees | 76 |  |  |  |  |  |  |  |  |  |
Business combination, accrued deal fees, net of tax | 65 |  |  |  |  |  |  |  |  |  |
Settlement of AspenTech share awards |  |  |  |  |  |  |  | 76 |  |  |
Business combination, deal and transaction fees | 127 |  |  |  |  |  |  |  |  |  |
Business combination, deal and transaction fees, net of tax | $ 113 |  |  |  |  |  |  |  |  |  |
National Instruments |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total consideration paid in cash at closing |  |  | $ 8,467 |  |  |  |  |  |  |  |
Net sales |  |  | $ 1,700 |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | $ 170 |
Amortization of intangible assets |  |  |  |  | 34 |  |  | 68 |  |  |
Net earnings from continuing operations common stockholders |  |  |  |  | 575 |  |  | 1,022 |  |  |
Acquisition/divestiture fees and related costs |  |  |  | $ 160 | 16 | $ 69 | $ 179 | 146 |  |  |
National Instruments | Backlog Amortization |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amortization of intangible assets |  |  |  |  | 34 |  |  | 68 |  |  |
National Instruments | Fair Value Adjustment to Inventory |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net earnings from continuing operations common stockholders |  |  |  |  |  |  |  |  | $ 213 |  |
National Instruments | Retention Bonus |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net earnings from continuing operations common stockholders |  |  |  |  |  |  |  |  | $ 47 |  |
Open Grid Systems Limited |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Purchase price of businesses, net of cash acquired |  | $ 46 |  |  |  |  |  |  |  |  |
Goodwill |  | 32 |  |  |  |  |  |  |  |  |
Intangible assets |  | $ 20 |  |  |  |  |  |  |  |  |
Weighted-average useful life |  | 5 years |  |  |  |  |  |  |  |  |
Gain on subordinated interest |  |  |  |  | $ 79 |  |  |  |  |  |
Loss on divestiture of business |  |  |  |  |  |  |  | $ 39 |  |  |

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