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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 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 + Details
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