| Cover | Nov. 14, 2019 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 14, 2019 |
| Entity File Number | 001-32431 |
| Entity Registrant Name | Dolby Laboratories, Inc. |
| Entity Central Index Key | 0001308547 |
| Entity Tax Identification Number | 90-0199783 |
| Entity Incorporation, State or Country Code | DE |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A common stock, $0.001 par value |
| Trading Symbol | DLB |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
