Subsequent Event	3 Months Ended
	Apr. 03, 2021
Subsequent Events [Abstract]
SUBSEQUENT EVENT	SUBSEQUENT EVENTOn April 14, 2021, Cadence acquired all of the outstanding equity of Pointwise, Inc. (“Pointwise”), a leader in mesh generation for CFD. The addition of Pointwise’s technologies and experienced team supports Cadence’s Intelligent System Design™ strategy and further broadens its System Design and Analysis portfolio, complementing recently acquired NUMECA. The consideration will be allocated to the assets acquired and liabilities assumed based on their respective estimated fair values on the acquisition date. Due to the timing of the acquisition, the initial accounting for the acquisition is incomplete. As such, Cadence is not able to disclose certain information relating to the acquisition, including the preliminary fair value of assets acquired and liabilities assumed. Cadence expects to complete the initial accounting for its acquisition of Pointwise during the second quarter of fiscal 2021.