Revenue (Details)	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Oct. 01, 2022		Sep. 30, 2023		Oct. 01, 2022
Revenue from External Customer [Line Items]
Percentage of product and maintenance revenue by product group	100.00%	100.00%		100.00%		100.00%
Custom Integrated Circuit (“IC”) Design and Simulation
Revenue from External Customer [Line Items]
Percentage of product and maintenance revenue by product group	22.00%	22.00%		21.00%		22.00%
Digital IC Design and Signoff
Revenue from External Customer [Line Items]
Percentage of product and maintenance revenue by product group	28.00%	29.00%		27.00%		28.00%
Functional Verification, including Emulation and Prototyping Hardware*
Revenue from External Customer [Line Items]
Percentage of product and maintenance revenue by product group	26.00%	25.00%	[1]	29.00%	[1]	26.00%	[1]
Intellectual Property (“IP”)
Revenue from External Customer [Line Items]
Percentage of product and maintenance revenue by product group	11.00%	12.00%		11.00%		13.00%
System Design and Analysis
Revenue from External Customer [Line Items]
Percentage of product and maintenance revenue by product group	13.00%	12.00%		12.00%		11.00%

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