DERIVATIVES, Effect of derivative instruments on Consolidated Statement of Operations (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Derivative [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within next Twelve Months			$ (1)
Designated as Hedging Instruments \| Cash Flow Hedging \| Foreign Exchange Contracts \| Accumulated Other Comprehensive Income (Loss)
Derivative [Line Items]
Gain (loss) recognized in accumulated other comprehensive income	$ 0	$ 0	(2)	$ 2
Designated as Hedging Instruments \| Cash Flow Hedging \| Foreign Exchange Contracts \| Cost of products and services
Derivative [Line Items]
Gain (loss) reclassified from accumulated other comprehensive income into cost of sales	0	1	0	3
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	0	0	1	0
Designated as Hedging Instruments \| Cash Flow Hedging \| Foreign Exchange Contracts \| Selling, general and administrative
Derivative [Line Items]
Gain (loss) reclassified from accumulated other comprehensive income into cost of sales	0	0	(1)	0
Not Designated as Hedging Instrument [Member] \| Other (income) expense, net
Derivative [Line Items]
Gain (loss) recognized in other income (expense),net	$ (2)	$ 0	$ (5)	$ 1

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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