OVERVIEW, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Land Sale (Details) £ in Millions, $ in Millions	9 Months Ended
Jul. 31, 2017 USD ($)	Jul. 31, 2016 USD ($)	Apr. 30, 2014 GBP (£)
Property, Plant and Equipment [Line Items]
Date of Land Sale Agreeement	Apr. 30, 2014
Binding contract to sell land \| £			£ 21
Gain (Loss) on Disposition of Property Plant Equipment \| $	$ 8	$ 10

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration