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
Gain (loss) reclassified from accumulated other comprehensive income (loss) into cost of sales	$ 0	$ (5)	$ 5	$ (5)
Cash Flow Hedging \| Cost of Sales
Derivative
Cash flow hedge net gain to be reclassified within next Twelve Months	5
Derivatives Designated as Hedging Instrument \| Cash Flow Hedging \| Foreign Exchange Contracts [Member] \| Accumulated Other Comprehensive Income (Loss)
Derivative
Gain (loss) recognized in accumulated other comprehensive income (loss)	4	5	(2)	(5)
Derivatives Designated as Hedging Instrument \| Cash Flow Hedging \| Foreign Exchange Contracts [Member] \| Cost of Sales
Derivative
Gain (loss) reclassified from accumulated other comprehensive income (loss) into cost of sales	0	(5)	5	(5)
Gain on time value of forward contracts recorded in cost of sales	1	0	2	0
Derivatives Not Designated as Hedging Instruments \| Other income (expense)
Derivative
Gain (loss) recognized in other income (expense)	$ 1	$ (5)	$ (2)	$ 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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Amount of increase 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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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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