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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 |  |

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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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