STOCKHOLDERS' EQUITY - Reclassifications out of accumulated comprehensive income (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives
Unrealized gain (loss) on derivatives	$ 5	$ (6)	$ 8	$ (14)
Amounts reclassified into earnings related to derivative instruments, tax	(1)	2	(2)	4
Unrealized gain (loss) on derivatives after reclassification and after Tax	4	(4)	6	(10)
Actuarial net loss	(6)	(16)	(12)	(32)
Prior service benefit	0	1	0	1
Actuarial net loss and prior service benefit reclassified, before tax	(6)	(15)	(12)	(31)
Tax on actuarial net loss and prior service benefit reclassified	2	4	3	8
Actuarial net loss and prior service benefit reclassified, net of tax	(4)	(11)	(9)	(23)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	(15)	(3)	(33)
Cost of Products and Services
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives
Unrealized gain (loss) on derivatives	$ 5	$ (6)	$ 8	$ (14)

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, after reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount, after 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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