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ACQUISITIONS - Intangible Assets Acquired (Details) - USD ($) $ in Millions | Aug. 23, 2019 | Jul. 31, 2020 | Oct. 31, 2019
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Gross Carrying Amount |  | $ 1,994 | $ 2,086
BioTek |  |  |
Business Acquisition [Line Items] |  |  |
Gross Carrying Amount | $ 637 |  |
In-Process R&D | 4 |  |
Total Intangible Assets, Gross (Excluding Goodwill) | 641 |  |
Developed Product Technology |  |  |
Business Acquisition [Line Items] |  |  |
Gross Carrying Amount |  | 1,419 | 1,413
Developed Product Technology | BioTek |  |  |
Business Acquisition [Line Items] |  |  |
Gross Carrying Amount | 387 |  |
Customer Relationships |  |  |
Business Acquisition [Line Items] |  |  |
Gross Carrying Amount |  | $ 330 | 329
Customer Relationships | BioTek |  |  |
Business Acquisition [Line Items] |  |  |
Gross Carrying Amount | 202 |  |
Backlog |  |  |
Business Acquisition [Line Items] |  |  |
Gross Carrying Amount |  |  | $ 5
Backlog | BioTek |  |  |
Business Acquisition [Line Items] |  |  |
Gross Carrying Amount | $ 5 |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 2 months |  |
Trademarks and Trade Names | BioTek |  |  |
Business Acquisition [Line Items] |  |  |
Gross Carrying Amount | $ 43 |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 10 years |  |
Minimum | Developed Product Technology | BioTek |  |  |
Business Acquisition [Line Items] |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 5 years |  |
Minimum | Customer Relationships | BioTek |  |  |
Business Acquisition [Line Items] |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 3 years |  |
Maximum | Developed Product Technology | BioTek |  |  |
Business Acquisition [Line Items] |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 13 years |  |
Maximum | Customer Relationships | BioTek |  |  |
Business Acquisition [Line Items] |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 8 years |  |

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