REVENUE - Revenue by Product Category (Details) - Product Concentration Risk - Revenue Benchmark		3 Months Ended		9 Months Ended
		Sep. 30, 2026 Rate	Sep. 30, 2025 Rate	Sep. 30, 2026 Rate	Sep. 30, 2025 Rate
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Revenue percentage by product category		100.00%	100.00%	100.00%	100.00%
Core EDA
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Revenue percentage by product category	[1]	69.00%	71.00%	69.00%	71.00%
Semiconductor IP
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Revenue percentage by product category		15.00%	14.00%	15.00%	14.00%
System Design and Analysis
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Revenue percentage by product category		16.00%	15.00%	16.00%	15.00%

[1] Includes immaterial amount of revenue accounted for under leasing arrangements.