Revenue - Schedule of Disaggregation of Revenue (Details) - Product Concentration Risk - Revenue	3 Months Ended		6 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue percentage by product group	100.00%	100.00%	100.00%	100.00%
EDA
Disaggregation of Revenue [Line Items]
Revenue percentage by product group	50.20%	57.40%	50.00%	56.30%
IP & System Integration
Disaggregation of Revenue [Line Items]
Revenue percentage by product group	40.70%	33.10%	41.10%	34.00%
Software Integrity Products & Services
Disaggregation of Revenue [Line Items]
Revenue percentage by product group	8.80%	9.20%	8.60%	9.30%
Other
Disaggregation of Revenue [Line Items]
Revenue percentage by product group	0.30%	0.30%	0.30%	0.40%