v3.7.0.1
Document and Entity Information - shares
3 Months Ended
Apr. 02, 2017
Apr. 27, 2017
Document Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Apr. 02, 2017  
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q1  
Trading Symbol CY  
Entity Registrant Name CYPRESS SEMICONDUCTOR CORP /DE/  
Entity Central Index Key 0000791915  
Current Fiscal Year End Date --01-01  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   329,438,101