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Goodwill and Intangible Assets - Summary of Goodwill (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Oct. 31, 2020 | Oct. 31, 2019
Goodwill [Roll Forward] |  |
Beginning Balance | $ 3,171,179 | $ 3,143,249
Additions | 173,732 | 23,690
Adjustments | 59 |
Effect of foreign currency translation | 20,144 | 4,240
Ending balance | 3,365,114 | 3,171,179
Semiconductor And System Design |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 2,758,926 | 2,730,990
Additions | 160,447 | 23,690
Adjustments | 59 |
Effect of foreign currency translation | 20,080 | 4,246
Ending balance | 2,939,512 | 2,758,926
Software Integrity |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 412,253 | 412,259
Additions | 13,285 | 0
Adjustments | 0 |
Effect of foreign currency translation | 64 | (6)
Ending balance | $ 425,602 | $ 412,253

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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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