v3.3.1.900
Document And Entity Information - shares
3 Months Ended
Jan. 01, 2016
Jan. 29, 2016
Entity Registrant Name Dolby Laboratories, Inc.  
Entity Central Index Key 0001308547  
Current Fiscal Year End Date --09-30  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Jan. 01, 2016  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Class A Common Stock [Member]    
Entity Common Stock, Shares Outstanding   52,221,668
Class B Common Stock [Member]    
Entity Common Stock, Shares Outstanding   48,574,390