Segment Disclosure - Reportable Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 5,842,619	$ 5,081,542	$ 4,204,193
Adjusted operating income	1,269,259	1,162,038	734,790
Operating Segments
Segment Reporting Information [Line Items]
Revenues	5,842,619	5,081,542	4,204,193
Adjusted operating income	$ 2,048,045	$ 1,675,102	$ 1,281,389
Adjusted operating margin	35.00%	33.00%	30.00%
Operating Segments | Design Automation
Segment Reporting Information [Line Items]
Revenues	$ 3,775,287	$ 3,300,173	$ 2,754,737
Adjusted operating income	$ 1,439,666	$ 1,206,561	$ 924,605
Adjusted operating margin	38.00%	37.00%	34.00%
Operating Segments | Design IP
Segment Reporting Information [Line Items]
Revenues	$ 1,542,726	$ 1,315,541	$ 1,055,672
Adjusted operating income	$ 532,055	$ 421,547	$ 318,473
Adjusted operating margin	34.00%	32.00%	30.00%
Operating Segments | Software Integrity
Segment Reporting Information [Line Items]
Revenues	$ 524,606	$ 465,828	$ 393,784
Adjusted operating income	$ 76,324	$ 46,994	$ 38,311
Adjusted operating margin	15.00%	10.00%	10.00%