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INVENTORY (Details) - USD ($) $ in Millions | 12 Months Ended
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Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Inventory-related excess and obsolescence charges | $ 29 | $ 27 | $ 25
Finished goods | 342 | 317 |
Purchased parts and fabricated assemblies | 415 | 388 |
Total inventory | $ 757 | $ 705 |

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