v3.26.1
Per Share Data (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Jun. 26, 2026
Jun. 27, 2025
Jun. 26, 2026
Jun. 27, 2025
Schedule Of Earnings Per Share Basic And Diluted [Line Items]        
Net income attributable to Dolby Laboratories, Inc. $ 28,602 $ 46,071 $ 176,844 $ 205,686
Weighted average shares outstanding-basic (in shares) 94,242 95,897 94,975 95,947
Potential common shares from options to purchase common stock (in shares) 16 316 32 395
Potential common shares from restricted stock units (in shares) 230 660 805 1,147
Potential common shares from ESPP (in shares) 30 27 47 48
Weighted average shares outstanding-diluted (in shares) 94,518 96,900 95,859 97,537
Net income per share attributable to Dolby Laboratories, Inc. - Basic (in usd per share) $ 0.30 $ 0.48 $ 1.86 $ 2.14
Net income per share attributable to Dolby Laboratories, Inc. - Diluted (in usd per share) $ 0.30 $ 0.48 $ 1.84 $ 2.11
Stock options        
Schedule Of Earnings Per Share Basic And Diluted [Line Items]        
Anti-dilutive securities, excluded from calculations (in shares) 3,421 1,516 2,934 1,425
Restricted stock units        
Schedule Of Earnings Per Share Basic And Diluted [Line Items]        
Anti-dilutive securities, excluded from calculations (in shares) 1,785 41 31 6
Employee stock purchase plan        
Schedule Of Earnings Per Share Basic And Diluted [Line Items]        
Anti-dilutive securities, excluded from calculations (in shares) 21 6 3 1