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INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016	Jan. 31, 2017
Income Tax Disclosure
Effective income tax rate	14.10%	22.20%	13.50%	18.10%
Provision for income taxes	$ 27	$ 26	$ 52	$ 47
Net Discrete Tax Expense (Benefit)	(1)	3	(3)	(3)
Related to Settlement of Audit
Income Tax Disclosure
Discrete Tax Expense (Benefit)			(7)
Incremental taxes					$ 7
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	14
U.S. Research & Development Tax Credit Extension
Income Tax Disclosure
Discrete Tax Expense (Benefit)				(5)
Pension Curtailment and Settlement
Income Tax Disclosure
Discrete Tax Expense (Benefit)			11	6
Return To Provision Adjustment
Income Tax Disclosure
Discrete Tax Expense (Benefit)	(5)	7		(9)
Return To Provision Adjustment - out of period [Member]
Income Tax Disclosure
Discrete Tax Expense (Benefit)		5
Realization of tax credits [Member]
Income Tax Disclosure
Discrete Tax Expense (Benefit)	$ 4	(8)
Miscellaneous Other Return To Provision Adjustment [Member] [Member]
Income Tax Disclosure
Discrete Tax Expense (Benefit)		2
Other Discrete Items
Income Tax Disclosure
Discrete Tax Expense (Benefit)		$ 2	$ (6)	$ 2

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