v3.10.0.1
Document And Entity Information - shares
6 Months Ended
Sep. 30, 2018
Nov. 02, 2018
Document Information [Abstract]    
Entity Registrant Name INTEGRATED DEVICE TECHNOLOGY INC  
Entity Central Index Key 0000703361  
Current Fiscal Year End Date --03-31  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   129,020,313
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2018  
Emerging Growth Company false  
Smaller Reporting Company false