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GOODWILL AND OTHER INTANGIBLE ASSETS | 6 Months Ended
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Apr. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL AND OTHER INTANGIBLE ASSETS | GOODWILL AND OTHER INTANGIBLE ASSETS The goodwill balances as of April 30, 2019 and October 31, 2018 and the activity for the six months ended April 30, 2019 for each of our reportable operating segments were as follows. Prior period amounts have been reclassified to conform to our organizational change as described in Note 16, "Segment Information."
| Communications Solutions Group |  | Electronic Industrial Solutions Group |  | Ixia Solutions Group |  | Total
| (in millions)
Balance as of October 31, 2018: |  |  |  |  |  |  |
Goodwill | $ | 497 |  |  | $ | 267 |  |  | $ | 1,116 |  |  | $ | 1,880 |
Accumulated impairment losses | — |  |  | — |  |  | (709 | ) |  | (709 | )
Goodwill as reported | 497 |  |  | 267 |  |  | 407 |  |  | 1,171 |
Foreign currency translation impact | 3 |  |  | — |  |  | — |  |  | 3 |
Balance as of April 30, 2019 | $ | 500 |  |  | $ | 267 |  |  | $ | 407 |  |  | $ | 1,174 |
Components of goodwill as of April 30, 2019: |  |  |  |  |  |  |
Goodwill | $ | 500 |  |  | $ | 267 |  |  | $ | 1,116 |  |  | $ | 1,883 |
Accumulated impairment losses | — |  |  | — |  |  | (709 | ) |  | (709 | )
Goodwill as reported | $ | 500 |  |  | $ | 267 |  |  | $ | 407 |  |  | $ | 1,174 |
The company has not identified any triggering events that indicate an impairment of goodwill in the six months ended April 30, 2019. Other intangible assets as of April 30, 2019 and October 31, 2018 consisted of the following:
| Other Intangible Assets as of April 30, 2019 |  | Other Intangible Assets as of October 31, 2018
| Gross Carrying Amount |  | Accumulated Amortization and Impairments |  | Net Book Value |  | Gross Carrying Amount |  | Accumulated Amortization and Impairments |  | Net Book Value
| (in millions)
Developed technology | $ | 835 |  |  | $ | 494 |  |  | $ | 341 |  |  | $ | 835 |  |  | $ | 415 |  |  | $ | 420 |
Backlog | 13 |  |  | 13 |  |  | — |  |  | 13 |  |  | 13 |  |  | — |
Trademark/Tradename | 33 |  |  | 17 |  |  | 16 |  |  | 33 |  |  | 14 |  |  | 19 |
Customer relationships | 304 |  |  | 120 |  |  | 184 |  |  | 304 |  |  | 100 |  |  | 204 |
Non-compete agreements | 1 |  |  | — |  |  | 1 |  |  | 1 |  |  | — |  |  | 1 |
Total amortizable intangible assets | 1,186 |  |  | 644 |  |  | 542 |  |  | 1,186 |  |  | 542 |  |  | 644 |
In-Process R&D | 1 |  |  | — |  |  | 1 |  |  | 1 |  |  | — |  |  | 1 |
Total | $ | 1,187 |  |  | $ | 644 |  |  | $ | 543 |  |  | $ | 1,187 |  |  | $ | 542 |  |  | $ | 645 |
During the six months ended April 30, 2019, there was no foreign exchange translation impact to other intangible assets. For both the three and six months ended April 30, 2019 and 2018, amortization of other intangible assets was $51 million and $102 million, respectively. Estimated intangible assets amortization expense for each of the five succeeding fiscal years is as follows:
| Amortization expense
| (in millions)
2019 (remainder) | $ | 101 |
2020 | 196 |
2021 | 128 |
2022 | 52 |
2023 | 44 |
Thereafter | 21 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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