v2.4.0.8
Document And Entity Information
6 Months Ended
Mar. 27, 2015
Apr. 24, 2015
Class A Common Stock [Member]
Apr. 24, 2015
Class B Common Stock [Member]
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-Q    
Document Period End Date Mar. 27, 2015    
Document Fiscal Year Focus 2015    
Document Fiscal Period Focus Q2    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   51,647,278 51,068,661