Segment Disclosure - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Segment Reporting Information [Line Items]
Total revenue	$ 970,321	$ 834,381
Adjusted operating income	148,348	87,516
Operating Segments
Segment Reporting Information [Line Items]
Adjusted operating income	$ 286,820	$ 186,933
Adjusted operating margin	30.00%	22.00%
Operating Segments | Semiconductor & System Design:
Segment Reporting Information [Line Items]
Total revenue	$ 878,368	$ 748,744
Adjusted operating income	$ 278,876	$ 178,851
Adjusted operating margin	32.00%	24.00%
Operating Segments | Software Integrity:
Segment Reporting Information [Line Items]
Total revenue	$ 91,953	$ 85,637
Adjusted operating income	$ 7,944	$ 8,082
Adjusted operating margin	9.00%	9.00%