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SHARE-BASED COMPENSATION Allocated Share-based compensation expense (Details) - USD ($) $ in Millions | 12 Months Ended
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Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018
Share-based compensation disclosures |  |  |
Share-based compensation expense | $ 84 | $ 72 | $ 71
Cost of Product and Services |  |  |
Share-based compensation disclosures |  |  |
Share-based compensation expense | 21 | 18 | 16
Research and Development |  |  |
Share-based compensation disclosures |  |  |
Share-based compensation expense | 9 | 7 | 7
Selling, General and Administrative |  |  |
Share-based compensation disclosures |  |  |
Share-based compensation expense | 54 | 47 | $ 48
Inventories |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount |  |  |
Share-based compensation expense | $ 0 | $ 0 |

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