| Component: (Network and Table) | |
|---|---|
| Network | 2402404 - Disclosure - Summary Of Significant Accounting Policies (Schedule Of Property, Plant, And Equipment, Estimated Useful Life) (Details) (http://www.dolby.com/role/SummaryOfSignificantAccountingPoliciesScheduleOfPropertyPlantAndEquipmentEstimatedUsefulLifeDetails) |
| Table | Significant Accounting Policies [Table] |
| Reporting Entity [Axis] | 0001308547 (http://www.sec.gov/CIK) |
| Period [Axis] | 2011-10-01 - 2012-09-28 |
| Property, Plant and Equipment [Line Items] | Property, Plant and Equipment by Type [Axis] | ||||
|---|---|---|---|---|---|
| Leasehold Improvements [Member] | Building [Member] | Machinery and Equipment [Member] | Furniture and Fixtures [Member] | Systems And Software Member | |
Property, plant, and equipment, useful life, minimum, years | 3 | 5 | 3 | ||
Property, plant, and equipment, useful life, maximum, years | 40 | 8 | 8 | 5 | |
Property, plant, and equipment, useful life, years | Lesser of useful life or related lease term | ||||