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SEGMENT INFORMATION Reconciliation of Reportable Results (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Reconcilitation between statement results and enterprise results [Abstract]
Total reportable segment income from operations	$ 1,202	$ 1,104	$ 973
Amortization	(125)	(105)	(117)
Acquisition and integration costs	(48)	(23)	(30)
Transformational initiatives	(44)	(25)	(12)
Asset impairment charges	0	21	0
Business exit and divestiture costs (primarily our NMR business)	0	(9)	0
NASD Site costs	(12)	(8)	0
Special compliance costs	(2)	(4)	0
Other	(30)	(5)	(7)
Interest income	36	38	22
Interest Expense	(74)	(75)	(79)
Other income (expense), net	16	79	53
Income before taxes	$ 919	$ 946	$ 803

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Amount of an item in the reconciliation of total profit or loss from reportable segments to the entity's consolidated income before income taxes, extraordinary items, discontinued operations.

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