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SHARE-BASED COMPENSATION (Allocation of period costs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Share-based Compensation Expense, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation Expense	$ 19	$ 16	$ 73	$ 66
Cost of products and services
Share-based Compensation Expense, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation Expense	4	2	13	11
Research and development
Share-based Compensation Expense, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation Expense	4	4	15	13
Selling, general and administrative
Share-based Compensation Expense, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation Expense	$ 11	$ 10	$ 45	$ 42

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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+ References

No definition available.

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