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GOODWILL AND OTHER INTANGIBLE ASSETS Textuals (Details) - USD ($) |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jan. 20, 2017 | Apr. 30, 2017 | Jan. 31, 2017 | Apr. 30, 2016 | Apr. 30, 2017 | Apr. 30, 2016
Finite-Lived Intangible Assets |  |  |  |  |  |
Additions to goodwill |  |  |  |  | $ 51,000,000 |
Addition to other intangible assets |  |  |  |  | 26,000,000 |
Fully amortized intangible assets removed |  |  |  |  | 131,000,000 |
Foreign exchange translation impact to other intangible assets |  |  |  |  | 1,000,000 |
Impairment of IPR&D |  |  | $ 0 | $ 0 | 0 | $ 0
Goodwill, Impairment Loss |  |  |  |  | 0 |
Amortization of intangible assets during the period |  | $ 31,000,000 |  | $ 40,000,000 | $ 62,000,000 | $ 83,000,000
Multiplicom |  |  |  |  |  |
Acquisition |  |  |  |  |  |
Purchase price of acquisition | $ 72,000,000 |  |  |  |  |

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