Document And Entity Information - USD ($) $ in Billions	12 Months Ended
	Sep. 25, 2015	Oct. 30, 2015	Mar. 27, 2015
Entity Registrant Name	Dolby Laboratories, Inc.
Entity Central Index Key	0001308547
Current Fiscal Year End Date	--09-25
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Sep. 25, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 1.1
Class A Common Stock [Member]
Entity Common Stock, Shares Outstanding		51,635,498
Class B Common Stock [Member]
Entity Common Stock, Shares Outstanding		49,215,750