| **Inventories (Tables)**            | 6 Months Ended                                                                                                                                                                                                                                                                        |
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| **Inventory Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                  |
| Schedule of inventories             | The following table presents the components of Inventories, net in our Consolidated Balance Sheets:(in millions)April 30, 2020 October 31, 2019Finished products$635 $640Work in process17 21Raw materials360 250Total inventories, net$1,012 $911 |

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| - Definition
Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.
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