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STOCKHOLDERS' EQUITY - Reclassifications out of accumulated comprehensive income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives
Unrealized gain (loss) on derivatives	$ 0	$ (5)	$ 5	$ (5)
Unrealized gains and (losses) on derivatives reclassified to cost of products, before tax	0	(5)	5	(5)
Reclassification of (gains) and losses into earnings related to derivative instruments, tax	0	2	(1)	2
Unrealized gains and (losses) on derivatives reclassified to cost of products, net of tax	0	(3)	4	(3)
Actuarial net loss	(10)	(10)	(20)	(19)
Prior service benefit	2	2	4	4
Actuarial net loss and prior service benefit reclassified, before tax	(8)	(8)	(16)	(15)
Tax on actuarial net loss and prior service benefit reclassified	1	3	5	4
Actuarial net loss and prior service benefit reclassified, net of tax	(7)	(5)	(11)	(11)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ (7)	$ (8)	$ (7)	$ (14)

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Amount before tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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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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