Revenue - Schedule of Disaggregation of Revenue (Details) - Product Concentration Risk - Revenues	12 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue percentage by product group	100.00%	100.00%	100.00%
EDA
Disaggregation of Revenue [Line Items]
Revenue percentage by product group	62.00%	66.40%	69.20%
Design IP
Disaggregation of Revenue [Line Items]
Revenue percentage by product group	24.80%	31.10%	29.00%
Ansys
Disaggregation of Revenue [Line Items]
Revenue percentage by product group	10.70%	0.00%	0.00%
Other
Disaggregation of Revenue [Line Items]
Revenue percentage by product group	2.50%	2.50%	1.80%