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DERIVATIVES, Effect of derivative instruments on Consolidated Statement of Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Derivative
Loss reclassified from accumulated other comprehensive income (loss) into cost of sales	$ 1	$ 0	$ 1	$ 5
Interest Expense
Derivative
Loss reclassified from accumulated other comprehensive income (loss) into cost of sales	(1)	0	(1)	0
Cost of Products and Services
Derivative
Loss reclassified from accumulated other comprehensive income (loss) into cost of sales	2	0	2	5
Cash Flow Hedging \| Cost of Products and Services
Derivative
Cash flow hedge net gain to be reclassified within next Twelve Months	4
Derivatives Designated as Hedging Instrument \| Cash Flow Hedging \| Foreign Exchange Contracts \| Accumulated Other Comprehensive Income (Loss)
Derivative
Gain (loss) recognized in accumulated other comprehensive loss	2	4	3	(2)
Derivatives Designated as Hedging Instrument \| Cash Flow Hedging \| Foreign Exchange Contracts \| Interest Expense
Derivative
Loss reclassified from accumulated other comprehensive income (loss) into cost of sales	(1)	0	(1)	0
Derivatives Designated as Hedging Instrument \| Cash Flow Hedging \| Foreign Exchange Contracts \| Cost of Products and Services
Derivative
Loss reclassified from accumulated other comprehensive income (loss) into cost of sales	2	0	2	5
Gain recognized in cost of sales	2	1	2	2
Derivatives Designated as Hedging Instrument \| Net Investment Hedging [Member] \| Foreign Exchange Contracts \| Accumulated Other Comprehensive Income (Loss)
Derivative
Gain (loss) recognized in accumulated other comprehensive loss	1	0	1	0
Derivatives Not Designated as Hedging Instruments \| Other income (expense)
Derivative
Gain recognized in cost of sales	$ (1)	$ 1	$ (3)	$ (2)