Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Apr. 01, 2018	May 14, 2018	Oct. 01, 2017
Document Information [Abstract]
Entity Registrant Name	INTEGRATED DEVICE TECHNOLOGY INC
Entity Central Index Key	0000703361
Current Fiscal Year End Date	--04-01
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 2,620
Entity Common Stock, Shares Outstanding (in shares)		129,264,653
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false
Document Period End Date	Apr. 01, 2018