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OVERVIEW, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 6 Months Ended
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Apr. 30, 2021
Restricted Cash [Abstract] |
Restrictions on Cash and Cash Equivalents | Restricted Cash and Restricted Cash Equivalents. Restricted cash and restricted cash equivalents are included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. A reconciliation of cash, cash equivalents and restricted cash to the condensed consolidated balance sheet follows:
| April 30, |  | October 31
| 2021 |  | 2020
| (in millions)
Cash and cash equivalents | $ | 1,380 |  |  | $ | 1,441 |
Restricted cash included in other assets | 7 |  |  | 6 |
Total cash, cash equivalents and restricted cash | $ | 1,387 |  |  | $ | 1,447 |

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