Goodwill and Intangible Assets - Summary of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2023	Oct. 31, 2022
Goodwill [Roll Forward]
Beginning Balance	$ 3,842,234	$ 3,575,785
Additions	229,351	318,775
Adjustments	3,097	1,285
Effect of foreign currency translation	(4,346)	(53,611)
Ending balance	4,070,336	3,842,234
Design Automation
Goodwill [Roll Forward]
Beginning Balance	2,176,337	2,156,732
Additions	229,351	68,923
Adjustments	0	1,285
Effect of foreign currency translation	(5,006)	(50,603)
Ending balance	2,400,682	2,176,337
Design IP
Goodwill [Roll Forward]
Beginning Balance	944,734	947,742
Additions	0	0
Adjustments	0	0
Effect of foreign currency translation	649	(3,008)
Ending balance	945,383	944,734
Software Integrity
Goodwill [Roll Forward]
Beginning Balance	721,163	471,311
Additions	0	249,852
Adjustments	3,097	0
Effect of foreign currency translation	11	0
Ending balance	$ 724,271	$ 721,163