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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS RETIREMENT AND POST RETIREMENT PENSION PLANS (Details) (Switzerland defined benefit plan settlement) - Defined benefit plan - Non-US - USD ($) $ in Millions		3 Months Ended			6 Months Ended
	Jan. 01, 2019	Apr. 30, 2019	Jan. 31, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Settlement loss		$ 0		$ 0	$ 2	$ 0
Switzerland Defined Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Date of transfer of defined benefit plan assets	Jan. 01, 2019
Settlement loss			$ 2

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- Definition

Date of transfer of defined benefit plan assets

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit from settlement and curtailment.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)(7)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)(7)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920

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