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STOCKHOLDERS' EQUITY - Stock Repurchase Program (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020	Feb. 18, 2021	Nov. 19, 2018
2019 Repurchase Program [Member]
Share repurchase program
Share repurchase program authorized amount						$ 1,750
Shares repurchased and retired during period, (Shares)		362,000	3,050,000.00	2,751,000
Shares repurchased and retired during period, (Value)		$ 33	$ 365	$ 219
Remaining authorized repurchase amount under share repurchase program					$ 193
2021 Repurchase Program [Member]
Share repurchase program
Share repurchase program authorized amount					$ 2,000
Shares repurchased and retired during period, (Shares)	804,352		2,192,000
Shares repurchased and retired during period, (Value)	$ 113		$ 287
Remaining authorized repurchase amount under share repurchase program	$ 1,713		$ 1,713

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Amount of stock repurchase plan authorized.

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

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