Document And Entity Information	3 Months Ended
	Sep. 28, 2014	Oct. 24, 2014
Document And Entity Information [Abstract]
Entity Registrant Name	LINEAR TECHNOLOGY CORP /CA/
Entity Central Index Key	0000791907
Current Fiscal Year End Date	--06-28
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 28, 2014
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		238,531,669