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FAIR VALUE MEASUREMENTS, Fair value of assets and liabilities measured on a recurring basis (Details) - USD ($) $ in Millions | Jul. 31, 2023 | Apr. 30, 2023 | Oct. 31, 2022 | Jul. 31, 2022 | Apr. 30, 2022 | Oct. 31, 2021
--- | --- | --- | --- | --- | --- | ---
Liabilities |  |  |  |  |  |
Contingent Consideration | $ 3 | $ 8 | $ 67 | $ 67 | $ 67 | $ 89
Fair Value, Measurements, Recurring |  |  |  |  |  |
Assets |  |  |  |  |  |
Total assets measured at fair value | 797 |  | 577 |  |  |
Liabilities |  |  |  |  |  |
Total liabilities measured at fair value | 51 |  | 103 |  |  |
Fair Value, Measurements, Recurring | Other Current Assets |  |  |  |  |  |
Assets |  |  |  |  |  |
Cash equivalents (money market funds) | 719 |  | 492 |  |  |
Derivative instruments (foreign exchange contracts) | 11 |  | 31 |  |  |
Fair Value, Measurements, Recurring | Other assets |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading securities | 38 |  | 31 |  |  |
Other investments | 29 |  | 23 |  |  |
Fair Value, Measurements, Recurring | Other accrued liabilities |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Derivative instruments (foreign exchange contracts) | 10 |  | 5 |  |  |
Contingent Consideration | 2 |  | 66 |  |  |
Fair Value, Measurements, Recurring | Other long-term liabilities |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Deferred compensation liability | 38 |  | 31 |  |  |
Contingent Consideration | 1 |  | 1 |  |  |
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |
Assets |  |  |  |  |  |
Total assets measured at fair value | 757 |  | 523 |  |  |
Liabilities |  |  |  |  |  |
Total liabilities measured at fair value | 0 |  | 0 |  |  |
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Current Assets |  |  |  |  |  |
Assets |  |  |  |  |  |
Cash equivalents (money market funds) | 719 |  | 492 |  |  |
Derivative instruments (foreign exchange contracts) | 0 |  | 0 |  |  |
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other assets |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading securities | 38 |  | 31 |  |  |
Other investments | 0 |  | 0 |  |  |
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other accrued liabilities |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Derivative instruments (foreign exchange contracts) | 0 |  | 0 |  |  |
Contingent Consideration | 0 |  | 0 |  |  |
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other long-term liabilities |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Deferred compensation liability | 0 |  | 0 |  |  |
Contingent Consideration | 0 |  | 0 |  |  |
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) |  |  |  |  |  |
Assets |  |  |  |  |  |
Total assets measured at fair value | 40 |  | 54 |  |  |
Liabilities |  |  |  |  |  |
Total liabilities measured at fair value | 48 |  | 36 |  |  |
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other Current Assets |  |  |  |  |  |
Assets |  |  |  |  |  |
Cash equivalents (money market funds) | 0 |  | 0 |  |  |
Derivative instruments (foreign exchange contracts) | 11 |  | 31 |  |  |
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other assets |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading securities | 0 |  | 0 |  |  |
Other investments | 29 |  | 23 |  |  |
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other accrued liabilities |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Derivative instruments (foreign exchange contracts) | 10 |  | 5 |  |  |
Contingent Consideration | 0 |  | 0 |  |  |
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other long-term liabilities |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Deferred compensation liability | 38 |  | 31 |  |  |
Contingent Consideration | 0 |  | 0 |  |  |
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) |  |  |  |  |  |
Assets |  |  |  |  |  |
Total assets measured at fair value | 0 |  | 0 |  |  |
Liabilities |  |  |  |  |  |
Total liabilities measured at fair value | 3 |  | 67 |  |  |
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Other Current Assets |  |  |  |  |  |
Assets |  |  |  |  |  |
Cash equivalents (money market funds) | 0 |  | 0 |  |  |
Derivative instruments (foreign exchange contracts) | 0 |  | 0 |  |  |
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Other assets |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading securities | 0 |  | 0 |  |  |
Other investments | 0 |  | 0 |  |  |
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Other accrued liabilities |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Derivative instruments (foreign exchange contracts) | 0 |  | 0 |  |  |
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Other accrued liabilities | Resolution Bioscience, Inc. |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Contingent Consideration | 2 |  | 66 |  |  |
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Other long-term liabilities |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Deferred compensation liability | 0 |  | 0 |  |  |
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Other long-term liabilities | Resolution Bioscience, Inc. |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Contingent Consideration | $ 1 |  | $ 1 |  |  |

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