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Goodwill and Intangible Assets | 3 Months Ended
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Jan. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets |
|  | Semiconductor Solutions |  | Infrastructure Software |  | Total
|  | (In millions)
Balance as of November 1, 2020 |  | $ | 25,959 |  |  | $ | 17,488 |  |  | $ | 43,447 |
Acquisition |  | — |  |  | 10 |  |  | 10 |
Balance as of January 31, 2021 |  | $ | 25,959 |  |  | $ | 17,498 |  |  | $ | 43,457 |
Intangible Assets
|  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value
|  | (In millions)
As of January 31, 2021: |  |  |  |  |  |
Purchased technology |  | $ | 24,126 |  |  | $ | (14,797) |  |  | $ | 9,329 |
Customer contracts and related relationships |  | 8,392 |  |  | (3,525) |  |  | 4,867 |
Order backlog |  | 2,579 |  |  | (1,965) |  |  | 614 |
Trade names |  | 797 |  |  | (341) |  |  | 456 |
Other |  | 252 |  |  | (124) |  |  | 128 |
Intangible assets subject to amortization |  | 36,146 |  |  | (20,752) |  |  | 15,394 |
In-process research and development |  | 25 |  |  | — |  |  | 25 |
Total |  | $ | 36,171 |  |  | $ | (20,752) |  |  | $ | 15,419 |
As of November 1, 2020: |  |  |  |  |  |
Purchased technology |  | $ | 24,119 |  |  | $ | (13,925) |  |  | $ | 10,194 |
Customer contracts and related relationships |  | 8,389 |  |  | (3,179) |  |  | 5,210 |
Order backlog |  | 2,579 |  |  | (1,836) |  |  | 743 |
Trade names |  | 797 |  |  | (322) |  |  | 475 |
Other |  | 252 |  |  | (117) |  |  | 135 |
Intangible assets subject to amortization |  | 36,136 |  |  | (19,379) |  |  | 16,757 |
In-process research and development |  | 25 |  |  | — |  |  | 25 |
Total |  | $ | 36,161 |  |  | $ | (19,379) |  |  | $ | 16,782 |
Based on the amount of intangible assets subject to amortization at January 31, 2021, the expected amortization expense for each of the next five years and thereafter was as follows:
Fiscal Year: |  | Expected Amortization Expense
|  | (In millions)
2021 (remainder) |  | $ | 4,047 |
2022 |  | 4,367 |
2023 |  | 3,237 |
2024 |  | 2,367 |
2025 |  | 656 |
Thereafter |  | 720 |
Total |  | $ | 15,394 |
The weighted-average remaining amortization periods by intangible asset category were as follows:
Amortizable intangible assets: |  | January 31, 2021
|  | (In years)
Purchased technology |  | 5
Customer contracts and related relationships |  | 4
Order backlog |  | 2
Trade names |  | 9
Other |  | 9

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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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