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Segment Disclosure (Tables)
 12 Months Ended
Oct. 31, 2025
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information, by Segment
Information by reportable segment is as follows:
 Year Ended October 31,
 202520242023
 (in thousands)
Total Segments:
      Revenue$7,054,178 $6,127,436 $5,318,014 
      Cost of revenue and operating expenses
4,421,327 3,765,377 3,389,987 
      Adjusted operating income2,632,851 2,362,059 1,928,027 
      Adjusted operating margin37 %39 %36 %
Design Automation:
      Revenue$5,302,340 $4,221,122 $3,775,288 
      Cost of revenue and operating expenses
3,088,814 2,589,237 2,361,362 
      Adjusted operating income2,213,526 1,631,885 1,413,926 
      Adjusted operating margin42 %39 %37 %
Design IP:
Revenue$1,751,838 $1,906,314 $1,542,726 
      Cost of revenue and operating expenses
1,332,513 1,176,140 1,028,625 
Adjusted operating income419,325 730,174 514,101 
Adjusted operating margin24 %38 %33 %
Schedule of Reconciliation of Operating Profit (Loss) from Segments to Consolidated The unallocated expenses managed at a consolidated level, including amortization of acquired intangible assets, stock-based compensation, changes in the fair value of deferred compensation plan, restructuring charges, and acquisition/divestiture related items, are presented in the table below to provide a reconciliation of the total adjusted operating income from segments to our consolidated operating income from continuing operations:
 Year Ended October 31,
 202520242023
 (in thousands)
Total segment adjusted operating income$2,632,851 $2,362,059 $1,928,027 
Reconciling items:
      Amortization of acquired intangible assets(504,383)(124,234)(54,576)
      Stock-based compensation expense(893,294)(657,935)(513,094)
      Deferred compensation plan(65,492)(85,446)(20,196)
      Restructuring charges— — (53,091)
      Acquisition/divestiture related items(254,755)(138,733)(13,831)
Total operating income$914,927 $1,355,711 $1,273,239 
Schedule of Revenues Related to Operations by Geographic Areas Revenue and property and equipment, net, related to operations in the United States and other geographic areas are:
 Year Ended October 31,
 202520242023
 (in thousands)
Revenue:
United States
$3,100,095 $2,739,756 $2,462,009 
Europe
888,524 614,584 514,780 
China
814,324 989,524 855,023 
Korea
946,999 773,018 625,502 
Other
1,304,236 1,010,554 860,700 
Consolidated$7,054,178 $6,127,436 $5,318,014 
Schedule of Property and Equipment by Geographic Areas
 As of October 31,
 20252024
 (in thousands)
Property and Equipment, net:
United States
$327,803 $335,306 
Other368,890 227,700 
Total$696,693 $563,006