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OVERVIEW, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Millions | Apr. 30, 2021 | Oct. 31, 2020 | Apr. 30, 2020 | Oct. 31, 2019
--- | --- | --- | --- | ---
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents |  |  |  |
Cash and cash equivalents | $ 1,380 | $ 1,441 |  |
Restricted Cash | 7 | 6 |  |
Cash, cash equivalents, restricted cash and restricted cash equivalents | 1,387 | 1,447 | $ 1,329 | $ 1,388
Variable Interest Entity |  |  |  |
Assets | 10,398 | 9,627 |  |
Fair Value of Financial Instruments |  |  |  |
Fair value of senior notes in excess of carrying value | 79 | 162 |  |
Variable Interest Entity, Not Primary Beneficiary [Member] |  |  |  |
Variable Interest Entity |  |  |  |
Assets | 53 | 67 |  |
Other Assets |  |  |  |
Operating Leases |  |  |  |
Right-of-Use Asset | 186 | 175 |  |
Other accrued and long-term liabilities |  |  |  |
Operating Leases |  |  |  |
Present value of future minimum lease payments | $ 191 | $ 178 |  |

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