Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Jul. 01, 2017	Sep. 06, 2017	Dec. 31, 2016
Document Documentand Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jul. 01, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Trading Symbol	ktcc
Entity Registrant Name	KEY TRONIC CORP
Entity Central Index Key	0000719733
Current Fiscal Year End Date	--07-01
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		10,759,680
Entity Public Float			$ 79.8