v3.19.2
Cover - shares
9 Months Ended
Jun. 28, 2019
Jul. 26, 2019
Document Type 10-Q  
Entity Current Reporting Status true  
Document Period End Date Jun. 28, 2019  
Document Transition Report false  
Entity File Number 001-32431  
Entity Registrant Name DOLBY LABORATORIES, INC.  
Entity Central Index Key 0001308547  
Current Fiscal Year End Date --09-27  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 90-0199783  
Entity Address, Address Line One 1275 Market Street  
Entity Address, City or Town San Francisco  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94103-1410  
City Area Code 415  
Local Phone Number 558-0200  
Title of 12(b) Security Class A common stock, $0.001 par value  
Trading Symbol DLB  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Class A Common Stock [Member]    
Entity Common Stock, Shares Outstanding   64,493,982
Class B Common Stock [Member]    
Entity Common Stock, Shares Outstanding   36,276,393