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SEGMENT INFORMATION - Reconciliation of Reportable Results (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Reconciliation of Operating Profit (Loss) from Segments to Consolidated
Total reportable segments’ income from operations	$ 241	$ 195	$ 464	$ 400
Transformational initiatives	0	(10)	(2)	(21)
Amortization of intangibles	(31)	(40)	(62)	(83)
Acquisition and integration costs	(7)	(12)	(21)	(17)
Business exit and divestiture costs (primarily our NMR business)	0	(1)	0	(6)
Pension settlement gain	0	0	32	1
Pension curtailment gain	0	0	0	15
Other	(2)	(1)	(4)	(3)
Interest income	5	3	9	5
Interest expense	(20)	(18)	(40)	(36)
Other income (expense), net	5	1	8	4
Income before taxes	$ 191	$ 117	$ 384	$ 259

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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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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

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The amount of net gain (loss) recognized in net periodic benefit cost as a result of an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services.

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