FINANCIAL INSTRUMENTS, FAIR VALUE AND RISK MANAGEMENT - Earnout Liability Activity (Details) - Level 3 - Earnout - USD ($) $ in Millions	3 Months Ended
Jan. 31, 2017	Jan. 31, 2016
Fair Value Inputs, Liabilities, Quantitative Information [Roll Forward]
Earnout liability, beginning balance	$ 33.8
Change in fair value	3.6	$ (4.9)
Earnout liability, ending balance	$ 37.4

Fair Value Inputs, Liabilities, Quantitative Information [Roll Forward]

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- Definition

Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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