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Acquisitions and Divestitures - Table (Details) - USD ($) $ in Millions | Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2016
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill | $ 17,537 | $ 17,516 | $ 16,090
2017 Acquisitions |  |  |
Business Acquisition [Line Items] |  |  |
Goodwill |  | 1,427 |
Net assets assumed |  | 340 |
Total fair value consideration |  | 2,455 |
2017 Acquisitions | Intangible Assets |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  | 603 |
2017 Acquisitions | In-process research and development |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  | $ 85 |

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