v2.4.0.6
Document And Entity Information
6 Months Ended
Mar. 30, 2012
Apr. 19, 2012
Class A Common Stock [Member]
Apr. 19, 2012
Class B Common Stock [Member]
Entity Registrant Name Dolby Laboratories, Inc.    
Entity Central Index Key 0001308547    
Current Fiscal Year End Date --09-28    
Entity Filer Category Large Accelerated Filer    
Document Type 10-Q    
Document Period End Date Mar. 30, 2012    
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus Q2    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   49,694,379 57,183,964