Business Combinations (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2024 USD ($)	Jul. 31, 2023 USD ($)	Jul. 31, 2024 USD ($) acquisition	Jul. 31, 2023 USD ($)	Oct. 31, 2023 USD ($)
Business Acquisition [Line Items]
Number of acquisitions | acquisition			3
Goodwill	$ 3,444,349		$ 3,444,349		$ 3,346,065
Transaction costs	53,000	$ 4,800	110,200	$ 9,800
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Consideration transferred			159,300
Intangible assets	78,900		78,900
Goodwill	97,500		97,500
Net tangible liabilities	17,100		17,100
Goodwill, expected tax deductible amount	0		0
Series of Individually Immaterial Business Acquisitions | Design Automation reporting unit
Business Acquisition [Line Items]
Goodwill	62,700		62,700
Series of Individually Immaterial Business Acquisitions | Design IP reporting unit
Business Acquisition [Line Items]
Goodwill	$ 34,800		$ 34,800