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REVENUE - Contract Assets and Liability (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Apr. 30, 2021 | Apr. 30, 2020 | Oct. 31, 2020
Contract Asset |  |  |
Contract Assets (Unbilled Accounts Receivable) | $ 165 |  | $ 153
Contract Liability |  |  |
Contract liability ending balance as of October 31, 2019 | 446 |  |
Net revenue deferred in the period | 304 |  |
Revenue recognized that was included in the contract liability balance at the beginning of the period | (267) | $ 226 |
Change in deferrals from customer cash advances, net of revenue recognized | 7 |  |
Currency Translation and Other Adjustment | 7 |  |
Contract liability ending balance as of April 30, 2020 | $ 497 |  |

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