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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