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GOODWILL AND OTHER INTANGIBLE ASSETS (Finite-Lived Assets and Future Amortization Expense) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018
Goodwill [Line Items] |  |  |
Finite-lived Intangible Assets Amortization Expense [Table Text Block] | Amortization of other intangible assets was $220 million in 2020, $210 million in 2019 and $204 million in 2018. Estimated intangible assets amortization expense for each of the five succeeding fiscal years is as follows:
| Amortization expense
| (in millions)
2021 | $ | 166 |
2022 | 88 |
2023 | 65 |
2024 | 26 |
2025 | 9 |
Thereafter | 5 |
Goodwill impairment | $ 0 | $ 0 | $ 709
Goodwill arising from acquisitions | 314 | 30 |
Intangible assets acquired from an acquisition | 88 | 56 |
Finite-Lived Intangible Assets, Translation Adjustments | 2 | 1 |
Amortization of Intangible Assets | 220 | $ 210 | 204
Amortization Expense, Maturity Schedule [Abstract] |  |  |
2020 | 166 |  |
2021 | 88 |  |
2022 | 65 |  |
2023 | 26 |  |
2024 | 9 |  |
Thereafter | $ 5 |  |
Ixia Solutions Group [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill impairment |  |  | $ 709

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