Document And Entity Information (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Mar. 29, 2015	May 15, 2015	Sep. 28, 2014
Document Information [Abstract]
Entity Registrant Name	INTEGRATED DEVICE TECHNOLOGY INC
Entity Central Index Key	0000703361
Current Fiscal Year End Date	--03-29
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 2,036
Entity Common Stock, Shares Outstanding		148,354,809
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false
Document Period End Date	Mar. 29, 2015