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FAIR VALUE MEASUREMENTS, Fair value of assets and liabilities measured on a recurring basis (Details) - USD ($) $ in Millions | Oct. 31, 2020 | Oct. 31, 2019
--- | --- | ---
Assets, Long-term [Abstract] |  |
Trading securities | $ 30 | $ 30
Fair Value, Recurring |  |
Assets, Short-term [Abstract] |  |
Cash equivalents (money market funds) | 740 | 784
Derivative instruments (foreign exchange contracts) | 2 | 12
Assets, Long-term [Abstract] |  |
Trading securities | 30 | 30
Other investments | 25 | 25
Total assets measured at fair value | 797 | 851
Liabilities, Short-term [Abstract] |  |
Derivative instruments (foreign exchange contracts) | 17 | 6
Liabilities, Long-term [Abstract] |  |
Deferred compensation liability | 30 | 30
Total liabilities measured at fair value | 47 | 36
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets, Short-term [Abstract] |  |
Cash equivalents (money market funds) | 740 | 784
Derivative instruments (foreign exchange contracts) | 0 | 0
Assets, Long-term [Abstract] |  |
Trading securities | 30 | 30
Other investments | 0 | 0
Total assets measured at fair value | 770 | 814
Liabilities, Short-term [Abstract] |  |
Derivative instruments (foreign exchange contracts) | 0 | 0
Liabilities, Long-term [Abstract] |  |
Deferred compensation liability | 0 | 0
Total liabilities measured at fair value | 0 | 0
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets, Short-term [Abstract] |  |
Cash equivalents (money market funds) | 0 | 0
Derivative instruments (foreign exchange contracts) | 2 | 12
Assets, Long-term [Abstract] |  |
Trading securities | 0 | 0
Other investments | 25 | 25
Total assets measured at fair value | 27 | 37
Liabilities, Short-term [Abstract] |  |
Derivative instruments (foreign exchange contracts) | 17 | 6
Liabilities, Long-term [Abstract] |  |
Deferred compensation liability | 30 | 30
Total liabilities measured at fair value | 47 | 36
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) |  |
Assets, Short-term [Abstract] |  |
Cash equivalents (money market funds) | 0 | 0
Derivative instruments (foreign exchange contracts) | 0 | 0
Assets, Long-term [Abstract] |  |
Trading securities | 0 | 0
Other investments | 0 | 0
Total assets measured at fair value | 0 | 0
Liabilities, Short-term [Abstract] |  |
Derivative instruments (foreign exchange contracts) | 0 | 0
Liabilities, Long-term [Abstract] |  |
Deferred compensation liability | 0 | 0
Total liabilities measured at fair value | $ 0 | $ 0

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- Definition Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=SL6742756-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 35 -Paragraph 54B -URI http://asc.fasb.org/extlink&oid=117332851&loc=SL7495116-110257 + Details
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- Definition 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. + References No definition available. + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 + Details
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- Definition 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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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