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GOODWILL AND OTHER INTANGIBLE ASSETS Textuals (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Apr. 15, 2021 | Apr. 30, 2021 | Apr. 30, 2020 | Apr. 30, 2021 | Apr. 30, 2020 | Oct. 31, 2020
Finite-Lived Intangible Assets |  |  |  |  |  |
Additions to goodwill |  |  |  | $ 435 |  |
Foreign currency translation impact on other intangible assets |  |  |  | 1 |  |
Impairment of IPR&D |  | $ 0 | $ 90 | 0 | $ 90 |
Goodwill impairment |  | 0 | 0 | 0 | 0 |
Amortization of intangible assets during the period |  | 45 | $ 47 | 90 | $ 95 |
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring |  |  |  |  |  |
Acquisition |  |  |  |  |  |
Contingent consideration liability |  | 96 |  | 96 |  |
Other accrued liabilities | Fair Value, Measurements, Recurring |  |  |  |  |  |
Acquisition |  |  |  |  |  |
Contingent consideration liability |  | 47 |  | 47 |  | $ 0
Other accrued liabilities | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring |  |  |  |  |  |
Acquisition |  |  |  |  |  |
Contingent consideration liability |  |  |  |  |  | 0
Other long-term liabilities | Fair Value, Measurements, Recurring |  |  |  |  |  |
Acquisition |  |  |  |  |  |
Contingent consideration liability |  | 49 |  | 49 |  | 0
Other long-term liabilities | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring |  |  |  |  |  |
Acquisition |  |  |  |  |  |
Contingent consideration liability |  |  |  |  |  | $ 0
Life Sciences and Applied Markets |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Additions to goodwill |  |  |  | 0 |  |
Diagnostics and Genomics |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Additions to goodwill |  |  |  | 435 |  |
Resolution Bioscience, Inc. |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Additions to goodwill |  |  |  | 435 |  |
Addition to other intangible assets |  |  |  | 263 |  |
Acquisition |  |  |  |  |  |
Purchase Price | $ 550 |  |  |  |  |
Contingent Consideration | $ 145 |  |  |  |  |
Resolution Bioscience, Inc. | Other accrued liabilities | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring |  |  |  |  |  |
Acquisition |  |  |  |  |  |
Contingent consideration liability |  | 47 |  | 47 |  |
Resolution Bioscience, Inc. | Other long-term liabilities | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring |  |  |  |  |  |
Acquisition |  |  |  |  |  |
Contingent consideration liability |  | $ 49 |  | $ 49 |  |

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