Document And Entity Information (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended
	Jan. 01, 2012	Jan. 29, 2012	Sep. 26, 2010
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			$ 671
Entity Common Stock, Shares Outstanding		141,392,129
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jan. 01, 2012