STOCKHOLDERS' EQUITY - Stock Repurchase Program (Details) - 2019 Repurchase Program [Member] - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019	Nov. 19, 2018
Share repurchase program
Share repurchase program authorized amount					$ 1,750
Shares repurchased and retired during period, (Shares)	362,000	8,000,000.0	2,800,000	9,800,000
Shares repurchased and retired during period, (Value)	$ 33	$ 549	$ 219	$ 674
Remaining authorized repurchase amount under share repurchase program	$ 808		$ 808

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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-Publisher FASB
-Name Accounting Standards Codification
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration