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Supplementary Financial Information - Schedule of Inventory (Details) - USD ($) $ in Millions | Jul. 31, 2025 | Oct. 31, 2024
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Finished goods | $ 4,800 | $ 4,338
Purchased parts and fabricated assemblies | 3,556 | 3,382
Inventory | $ 8,356 | $ 7,720

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