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ACQUISITIONS - Text (Details) - USD ($) $ in Millions | Aug. 23, 2019 | Nov. 14, 2018 | Oct. 31, 2020 | Oct. 31, 2019
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ACEA Biosciences, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Purchase price for acquisition |  | $ 250 |  |
BioTek |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Purchase price for acquisition | $ 1,170 |  |  |
Cash payment to acquire business | 470 |  |  |
Liability incurred to pay for acquisition | $ 700 |  |  |
Acquisition transaction costs |  |  | $ 12 | $ 4

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