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STOCKHOLDERS' EQUITY Stock Repurchases (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Jan. 31, 2017	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014	May 28, 2015
Share Repurchase Program [Line Items]
Cost to repurchase shares of common stock under share repurchase program		$ 434	$ 267	$ 200
2014 Share Repurchase Program [Member]
Share Repurchase Program [Line Items]
Weighted average count of diluted shares		335.0
Number of treasury shares acquired		2.4	6.0	4.0
Cost to repurchase shares of common stock under share repurchase program		$ 98	$ 267	$ 200
2015 Repurchase Program [Member]
Share Repurchase Program [Line Items]
Stock Repurchase Program, Authorized Amount					$ 1,140
Number of treasury shares acquired		8.3
Cost to repurchase shares of common stock under share repurchase program		$ 336
Remaining authorized repurchase amount		$ 804
Subsequent Event [Member]
Share Repurchase Program [Line Items]
Number of treasury shares retired	292.5
Aggregate cost of treasury shares retired.	$ 10,600
Subsequent Event [Member] | 2015 Repurchase Program [Member]
Share Repurchase Program [Line Items]
Number of treasury shares acquired	2.5
Cost to repurchase shares of common stock under share repurchase program	$ 111
Retained Earnings | Subsequent Event [Member]
Share Repurchase Program [Line Items]
Aggregate cost of treasury shares retired.	6,700
Additional Paid-in Capital | Subsequent Event [Member]
Share Repurchase Program [Line Items]
Aggregate cost of treasury shares retired.	$ 3,900

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The approximate number of weighted average diluted shares the new repurchase program announced on November 22, 2013, is designed to maintain.

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The cash outflow to reacquire common stock during the period.

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Amount of decrease of par value, additional paid in capital (APIC) and retained earnings of common and preferred stock retired from treasury when treasury stock is accounted for under the cost method.

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Number of shares that have been repurchased during the period and are being held in treasury.

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