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FAIR VALUE MEASUREMENTS, Fair value of assets and liabilities measured on a recurring basis (Details) - USD ($) $ in Millions	Jul. 31, 2024	Apr. 30, 2024	Oct. 31, 2023	Jul. 31, 2023	Apr. 30, 2023	Oct. 31, 2022
Liabilities
Contingent Consideration	$ 1	$ 1	$ 1	$ 3	$ 8	$ 67
Fair Value, Measurements, Recurring
Assets
Total assets measured at fair value	1,268		1,075
Liabilities
Total liabilities measured at fair value	51		39
Fair Value, Measurements, Recurring | Other Current Assets
Assets
Cash equivalents (money market funds)	1,185		994
Derivative instruments (foreign exchange contracts)	9		19
Fair Value, Measurements, Recurring | Other assets
Assets
Trading securities	43		36
Other investments	31		26
Fair Value, Measurements, Recurring | Other accrued liabilities
Liabilities
Derivative instruments (foreign exchange contracts)	7		2
Contingent Consideration	1		1
Fair Value, Measurements, Recurring | Other long-term liabilities
Liabilities
Deferred compensation liability	43		36
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Total assets measured at fair value	1,228		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)	1,185		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	43		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	40		45
Liabilities
Total liabilities measured at fair value	50		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)	9		19
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other assets
Assets
Trading securities	0		0
Other investments	31		26
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other accrued liabilities
Liabilities
Derivative instruments (foreign exchange contracts)	7		2
Contingent Consideration	0		0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other long-term liabilities
Liabilities
Deferred compensation liability	43		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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