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FAIR VALUE MEASUREMENTS, Fair value of assets and liabilities measured on a recurring basis (Details) - USD ($) $ in Millions	Apr. 30, 2024	Jan. 31, 2024	Oct. 31, 2023	Apr. 30, 2023	Jan. 31, 2023	Oct. 31, 2022
Liabilities
Contingent Consideration	$ 1	$ 1	$ 1	$ 8	$ 3	$ 67
Fair Value, Measurements, Recurring
Assets
Total assets measured at fair value	1,106		1,075
Liabilities
Total liabilities measured at fair value	45		39
Fair Value, Measurements, Recurring | Other Current Assets
Assets
Cash equivalents (money market funds)	1,022		994
Derivative instruments (foreign exchange contracts)	14		19
Fair Value, Measurements, Recurring | Other assets
Assets
Trading securities	40		36
Other investments	30		26
Fair Value, Measurements, Recurring | Other accrued liabilities
Liabilities
Derivative instruments (foreign exchange contracts)	4		2
Contingent Consideration	1		1
Fair Value, Measurements, Recurring | Other long-term liabilities
Liabilities
Deferred compensation liability	40		36
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Total assets measured at fair value	1,062		1,030
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)	1,022		994
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	40		36
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
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Total assets measured at fair value	44		45
Liabilities
Total liabilities measured at fair value	44		38
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)	14		19
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other assets
Assets
Trading securities	0		0
Other investments	30		26
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other accrued liabilities
Liabilities
Derivative instruments (foreign exchange contracts)	4		2
Contingent Consideration	0		0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other long-term liabilities
Liabilities
Deferred compensation liability	40		36
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	1		1
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	1		1
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Other long-term liabilities
Liabilities
Deferred compensation liability	$ 0		$ 0

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial and nonfinancial obligations.

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Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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