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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, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Derivative
Loss reclassified from accumulated other comprehensive loss into cost of sales	$ (6)	$ 1	$ (14)	$ 1
Interest Expense
Derivative
Loss reclassified from accumulated other comprehensive loss into cost of sales	0	(1)	0	(1)
Cost of Products and Services
Derivative
Loss reclassified from accumulated other comprehensive loss into cost of sales	(6)	2	(14)	2
Cash Flow Hedging \| Cost of Products and Services
Derivative
Cash flow hedge net gain to be reclassified within next Twelve Months	0
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	0	2	(6)	3
Derivatives Designated as Hedging Instrument \| Cash Flow Hedging \| Foreign Exchange Contracts \| Interest Expense
Derivative
Loss reclassified from accumulated other comprehensive loss into cost of sales	0	(1)	0	(1)
Derivatives Designated as Hedging Instrument \| Cash Flow Hedging \| Foreign Exchange Contracts \| Cost of Products and Services
Derivative
Loss reclassified from accumulated other comprehensive loss into cost of sales	(6)	2	(14)	2
Loss recognized in other income (expense)	0	2	0	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	1	(3)	1
Derivatives Not Designated as Hedging Instruments \| Other income (expense)
Derivative
Loss recognized in other income (expense)	$ 3	$ (1)	$ (1)	$ (3)