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STOCKHOLDERS' EQUITY Stock Repurchases (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018	Nov. 19, 2018	May 28, 2015
Share Repurchase Program [Line Items]
Stock Repurchased and Retired During Period, Value	$ 469	$ 723	$ 422
2015 Repurchase Program [Member]
Share Repurchase Program [Line Items]
Stock Repurchase Program, Authorized Amount					$ 1,140
Stock Repurchased and Retired During Period, Shares			6.4
Stock Repurchased and Retired During Period, Value			$ 422
Remaining authorized repurchase amount		$ 188
2019 Repurchase Program [Member]
Share Repurchase Program [Line Items]
Stock Repurchase Program, Authorized Amount				$ 1,750
Stock Repurchased and Retired During Period, Shares	5.2	10.4
Stock Repurchased and Retired During Period, Value	$ 469	$ 723
Remaining authorized repurchase amount	558
Retained Earnings
Share Repurchase Program [Line Items]
Stock Repurchased and Retired During Period, Value	398	580	335
Additional Paid-in Capital
Share Repurchase Program [Line Items]
Stock Repurchased and Retired During Period, Value	$ 71	$ 143	$ 87

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Number of shares that have been repurchased and retired during the period.

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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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