v2.4.0.8
Document And Entity Information (USD $)
In Billions, except Share data, unless otherwise specified
12 Months Ended
Sep. 27, 2013
Mar. 29, 2013
Oct. 25, 2013
Class A Common Stock [Member]
Oct. 25, 2013
Class B Common Stock [Member]
Entity Registrant Name Dolby Laboratories, Inc.      
Entity Central Index Key 0001308547      
Current Fiscal Year End Date --09-27      
Entity Filer Category Large Accelerated Filer      
Document Type 10-K      
Document Period End Date Sep. 27, 2013      
Document Fiscal Year Focus 2013      
Document Fiscal Period Focus FY      
Amendment Flag false      
Entity Common Stock, Shares Outstanding     47,290,710 54,471,875
Entity Well-known Seasoned Issuer Yes      
Entity Voluntary Filers No      
Entity Current Reporting Status Yes      
Entity Public Float   $ 1.2