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STOCKHOLDERS' EQUITY - Stock Repurchase Program (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017	May 28, 2015
Share repurchase program
Aggregate cost of shares repurchased			$ 93	$ 194
Treasury Stock Retired
Number of treasury shares retired (is shares)	711,000	1,600,000	1,300,000	4,100,000
Aggregate cost of treasury shares retired	$ 49	$ 83	$ 93	$ 194
2015 Repurchase Program
Share repurchase program
Share repurchase program authorized amount					$ 1,140
Shares repurchased (in shares)	674,000	1,600,000	1,300,000	4,100,000
Aggregate cost of shares repurchased	$ 46	$ 83	$ 93	$ 194
Remaining authorized repurchase amount under share repurchase program	$ 517		$ 517

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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 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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