FINANCIAL INSTRUMENTS, FAIR VALUE AND RISK MANAGEMENT - Schedule of Derivative Financial Instruments and Investments Classification on Consolidated Balance Sheet (Details) - USD ($) $ in Millions	Apr. 30, 2017	Oct. 31, 2016
Derivatives, Fair Value [Line Items]
Available-for-sale securities	$ 1.4	$ 1.4
Held-for-trading securities	1.5	1.4
Total assets	2.9	2.8
Total liabilities	39.7	36.5
Foreign exchange forward contracts
Derivatives, Fair Value [Line Items]
Foreign exchange forward contracts (Derivative liabilities)	1.8	2.7
Investments
Derivatives, Fair Value [Line Items]
Available-for-sale securities	1.4	1.4
Held-for-trading securities	1.5	1.4
Accounts payable and accrued liabilities \| Foreign exchange forward contracts
Derivatives, Fair Value [Line Items]
Foreign exchange forward contracts (Derivative liabilities)	1.8	2.7
Other long-term liabilities
Derivatives, Fair Value [Line Items]
Earnout liability	$ 37.9	$ 33.8

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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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.

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Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.

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Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading.

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