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Goodwill and Intangible Assets | 12 Months Ended
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Nov. 04, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | Goodwill and Intangible Assets Goodwill
|  | Wired Infrastructure |  | Wireless Communications |  | Enterprise Storage |  | Industrial & Other |  | Total
|  | (In millions)
Balance as of October 30, 2016 |  | $ | 17,641 |  |  | $ | 5,952 |  |  | $ | 995 |  |  | $ | 144 |  |  | $ | 24,732 |
Broadcom Merger adjustments |  | (25 | ) |  | (7 | ) |  | — |  |  | — |  |  | (32 | )
Acquisitions |  | 6 |  |  | — |  |  | — |  |  | — |  |  | 6 |
Balance as of October 29, 2017 |  | 17,622 |  |  | 5,945 |  |  | 995 |  |  | 144 |  |  | 24,706 |
Acquisitions |  | 83 |  |  | — |  |  | 2,117 |  |  | 7 |  |  | 2,207 |
Balance as of November 4, 2018 |  | $ | 17,705 |  |  | $ | 5,945 |  |  | $ | 3,112 |  |  | $ | 151 |  |  | $ | 26,913 |
During each of the fourth quarters of fiscal years 2018, 2017 and 2016, we completed our annual impairment assessments and concluded that goodwill was not impaired in any of these years. Intangible Assets
|  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value
|  | (In millions)
As of November 4, 2018: |  |  |  |  |  |
Purchased technology |  | $ | 15,806 |  |  | $ | (6,816 | ) |  | $ | 8,990 |
Customer contracts and related relationships |  | 1,792 |  |  | (878 | ) |  | 914 |
Trade names |  | 578 |  |  | (170 | ) |  | 408 |
Other |  | 239 |  |  | (53 | ) |  | 186 |
Intangible assets subject to amortization |  | 18,415 |  |  | (7,917 | ) |  | 10,498 |
IPR&D |  | 264 |  |  | — |  |  | 264 |
Total |  | $ | 18,679 |  |  | $ | (7,917 | ) |  | $ | 10,762 |
As of October 29, 2017: |  |  |  |  |  |
Purchased technology |  | $ | 12,724 |  |  | $ | (4,265 | ) |  | $ | 8,459 |
Customer contracts and related relationships |  | 4,240 |  |  | (3,100 | ) |  | 1,140 |
Trade names |  | 528 |  |  | (117 | ) |  | 411 |
Other |  | 135 |  |  | (25 | ) |  | 110 |
Intangible assets subject to amortization |  | 17,627 |  |  | (7,507 | ) |  | 10,120 |
IPR&D |  | 712 |  |  | — |  |  | 712 |
Total |  | $ | 18,339 |  |  | $ | (7,507 | ) |  | $ | 10,832 |
Based on the amount of intangible assets subject to amortization at November 4, 2018, the expected amortization expense for each of the next five fiscal years and thereafter was as follows:
Fiscal Year: |  | Expected Amortization Expense
|  | (In millions)
2019 |  | $ | 2,882 |
2020 |  | 2,437 |
2021 |  | 1,945 |
2022 |  | 1,441 |
2023 |  | 650 |
Thereafter |  | 1,143 |
Total |  | $ | 10,498 |
The weighted-average amortization periods remaining by intangible asset category were as follows:
Amortizable intangible assets: |  | November 4, 2018 |  | October 29, 2017
|  | (In years)
Purchased technology |  | 6 |  | 5
Customer contracts and related relationships |  | 5 |  | 4
Trade names |  | 12 |  | 13
Other |  | 10 |  | 10

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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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