v3.5.0.2
Document and Entity Information - shares
9 Months Ended
Oct. 02, 2016
Nov. 01, 2016
Document Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Oct. 02, 2016  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q3  
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   322,699,760