DERIVATIVES, Effect of derivative instruments on Consolidated Statement of Operations (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Derivative
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	$ (7)	$ 3	$ (2)	$ 7
Interest Expense
Derivative
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	0	0	(1)	(1)
Cost of Products and Services
Derivative
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(7)	3	(1)	8
Derivatives Designated as Hedging Instrument \| Cash Flow Hedging \| Foreign Exchange Contracts
Derivative
Gain (loss) recognized	$ 2	$ 2	$ 5	$ 5
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of revenue	Cost of revenue	Cost of revenue	Cost of revenue
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	$ 3	$ (3)	$ (1)	$ (4)
Derivatives Designated as Hedging Instrument \| Cash Flow Hedging \| Foreign Exchange Contracts \| Interest Expense
Derivative
Gain (loss) reclassified from accumulated other comprehensive loss into Interest expense	0	0	(1)	(1)
Derivatives Designated as Hedging Instrument \| Cash Flow Hedging \| Foreign Exchange Contracts \| Cost of Products and Services
Derivative
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(7)	3	(1)	8
Derivatives Designated as Hedging Instrument \| Net Investment Hedging \| Foreign Exchange Contracts \| Accumulated Other Comprehensive Income (Loss)
Derivative
Gain (loss) recognized in accumulated other comprehensive loss - translation adjustment	0	0	(1)	0
Derivatives Not Designated as Hedging Instruments
Derivative
Gain (loss) recognized	$ 0	$ 1	$ 9	$ 2
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other income (expense), net	Other income (expense), net	Other income (expense), net	Other income (expense), net

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

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The amount of net gains or losses on interest rate cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings.

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Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

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Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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