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OVERVIEW AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Millions |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 20, 2024 | Jan. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2023 | Oct. 31, 2022 | Oct. 31, 2021
Gain (Loss) on Disposition of Assets [Abstract] |  |  |  |  |  |
Proceeds from Divestiture of Businesses |  |  | $ 0 | $ 50 | $ 0 |
Net gain on Divestiture of Business |  |  | 0 | 43 | 0 |
Goodwill adjustment related to divestiture of business |  |  |  | (13) |  |
Advertising Expense |  |  |  |  |  |
Advertising costs expensed as incurred |  |  | 49 | 54 | 66 |
Cash and Cash Equivalents |  |  |  |  |  |
Short-term Investments |  |  | 0 | 0 |  |
Cash and cash equivalents |  |  | 1,329 | 1,590 | 1,053 |
Restricted Cash |  |  | 3 | 3 | 3 |
Cash, cash equivalents and restricted cash |  |  | 1,332 | 1,593 | 1,056 | $ 1,490
Goodwill and Intangible Assets |  |  |  |  |  |
Goodwill impairment |  | $ 0 | 0 | 0 | 0 |
Impairment of indefinite-lived intangible assets |  |  | 6 | 0 | 0 |
Long -Lived Assets |  |  |  |  |  |
Impairment of Long-Lived Assets |  |  | 19 | 277 | 0 |
Variable Interest Entity |  |  |  |  |  |
Assets |  |  | 11,846 | 10,763 |  |
Fair Value Disclosures |  |  |  |  |  |
Equity Method Investments |  |  | 0 | 0 |  |
Carrying Value of Senior Notes |  |  | 3,345 | 2,735 |  |
Employee Compensation and Benefits |  |  |  |  |  |
Employee compensation and benefits accrued |  |  | 116 | 120 |  |
Share-based Payment Arrangement, Noncash Expense [Abstract] |  |  |  |  |  |
Share-based compensation expense |  |  | 130 | 112 | 126 |
Foreign Currency Translation |  |  |  |  |  |
Foreign currency translation net gain (Ioss) |  |  | 4 | 2 | $ (6) |
In-Process R&D |  |  | 0 | 10 |  |
Senior Notes |  |  |  |  |  |
Fair Value Disclosures |  |  |  |  |  |
Carrying Value of Senior Notes |  |  | $ 3,326 | $ 2,135 |  |
Accounts Receivable |  |  |  |  |  |
Accounts Receivable |  |  |  |  |  |
Percent of Accounts receivable from a single customer |  |  | No single customer accounted for more than 10 percent of accounts receivable | No single customer accounted for more than 10 percent of accounts receivable |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Senior Notes |  |  |  |  |  |
Foreign Currency Translation |  |  |  |  |  |
Long-term Debt, Fair Value |  |  | $ 3,083 | $ 1,747 |  |
Variable Interest Entity, Not Primary Beneficiary |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |
Assets |  |  | 79 | 82 |  |
Non-US |  |  |  |  |  |
Cash and Cash Equivalents |  |  |  |  |  |
Cash and cash equivalents |  |  | $ 1,313 |  |  |
Resolution Bioscience, Inc. |  |  |  |  |  |
Gain (Loss) on Disposition of Assets [Abstract] |  |  |  |  |  |
Net gain on Divestiture of Business |  |  |  | 43 |  |
Long -Lived Assets |  |  |  |  |  |
Long lived assets held for sale Impairment |  |  |  | 270 |  |
BIOVECTRA |  |  |  |  |  |
Foreign Currency Translation |  |  |  |  |  |
Purchase price for acquisition | $ 915 |  |  |  |  |
Minimum |  |  |  |  |  |
Goodwill and Intangible Assets |  |  |  |  |  |
Finite Lived Intangible Assets Useful Life |  |  | 2 years |  |  |
Minimum | Machinery and Equipment |  |  |  |  |  |
Property, Plant and Equipment [Abstract] |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 3 years |  |  |
Minimum | Software Development |  |  |  |  |  |
Property, Plant and Equipment [Abstract] |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 3 years |  |  |
Maximum |  |  |  |  |  |
Goodwill and Intangible Assets |  |  |  |  |  |
Finite Lived Intangible Assets Useful Life |  |  | 15 years |  |  |
Maximum | Machinery and Equipment |  |  |  |  |  |
Property, Plant and Equipment [Abstract] |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 10 years |  |  |
Maximum | Software Development |  |  |  |  |  |
Property, Plant and Equipment [Abstract] |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 5 years |  |  |
Diagnostics and Genomics |  |  |  |  |  |
Gain (Loss) on Disposition of Assets [Abstract] |  |  |  |  |  |
Goodwill adjustment related to divestiture of business |  |  |  | $ (13) |  |

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