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FAIR VALUE MEASUREMENTS, Contingent Consideration (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2022 USD ($) | Apr. 30, 2021 USD ($) | Apr. 30, 2022 USD ($) | Apr. 30, 2021 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Other | $ 0 | $ 3 | $ 0 | $ 6
Resolution Bioscience, Inc. |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Contingent Consideration maximum earn-out period | 2 years 8 months 12 days |  |  |
Contingent Consideration Arrangement - Maximum | $ 145 |  | $ 145 |
Measurement Input, Asset Volatility |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Business Combination, Contingent Consideration, Liability, Measurement Input | 0.522 |  | 0.522 |
Measurement Input, Revenue Volatility | Minimum |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Business Combination, Contingent Consideration, Liability, Measurement Input | 0.141 |  | 0.141 |
Measurement Input, Revenue Volatility | Maximum |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Business Combination, Contingent Consideration, Liability, Measurement Input | 0.153 |  | 0.153 |

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