Cover - USD ($) $ in Billions	12 Months Ended
Cover - USD ($) $ in Billions	Sep. 26, 2025	Oct. 24, 2025	Mar. 28, 2025
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Sep. 26, 2025
Document Transition Report	false
Entity File Number	001-32431
Entity Registrant Name	DOLBY LABORATORIES, INC.
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 Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 3.0
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant’s Definitive Proxy Statement to be filed with the Commission pursuant to Regulation 14A in connection with the registrant’s 2026 Annual Meeting of Stockholders, to be filed subsequent to the date hereof, are incorporated by reference into Part III of this Report. Such Definitive Proxy Statement will be filed with the Securities and Exchange Commission not later than 120 days after the conclusion of the registrant’s fiscal year ended September 26, 2025. Except with respect to information specifically incorporated by reference in this Form 10-K, the Definitive Proxy Statement is not deemed to be filed as part of this Form 10-K.
Entity Central Index Key	0001308547
Current Fiscal Year End Date	--09-26
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
Amendment Flag	false
Class A Common Stock [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		60,845,846
Common Class B [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		34,660,045

Dolby Laboratories, Inc. 10-K