3.25.3 html 379 632 1 true 114 0 false 6 false false R1.htm 0000001 - Document - Cover Sheet http://www.dolby.com/role/Cover Cover Cover 1 false false R2.htm 0000002 - Document - Audit Information Sheet http://www.dolby.com/role/AuditInformation Audit Information Cover 2 false false R3.htm 9952151 - Statement - Consolidated Balance Sheets Sheet http://www.dolby.com/role/ConsolidatedBalanceSheets Consolidated Balance Sheets Statements 3 false false R4.htm 9952152 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://www.dolby.com/role/ConsolidatedBalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) Statements 4 false false R5.htm 9952153 - Statement - Consolidated Statements Of Operations Sheet http://www.dolby.com/role/ConsolidatedStatementsOfOperations Consolidated Statements Of Operations Statements 5 false false R6.htm 9952154 - Statement - Consolidated Statements of Comprehensive Income Statement Sheet http://www.dolby.com/role/ConsolidatedStatementsofComprehensiveIncomeStatement Consolidated Statements of Comprehensive Income Statement Statements 6 false false R7.htm 9952155 - Statement - Consolidated Statements of Comprehensive Income Statement (Parenthetical) Sheet http://www.dolby.com/role/ConsolidatedStatementsofComprehensiveIncomeStatementParenthetical Consolidated Statements of Comprehensive Income Statement (Parenthetical) Statements 7 false false R8.htm 9952156 - Statement - Consolidated Statements Of Stockholders' Equity Sheet http://www.dolby.com/role/ConsolidatedStatementsOfStockholdersEquity Consolidated Statements Of Stockholders' Equity Statements 8 false false R9.htm 9952157 - Statement - Consolidated Statements Of Stockholders' Equity And Comprehensive Income (Parenthetical) Sheet http://www.dolby.com/role/ConsolidatedStatementsOfStockholdersEquityAndComprehensiveIncomeParenthetical Consolidated Statements Of Stockholders' Equity And Comprehensive Income (Parenthetical) Statements 9 false false R10.htm 9952158 - Statement - Consolidated Statements Of Cash Flows Sheet http://www.dolby.com/role/ConsolidatedStatementsOfCashFlows Consolidated Statements Of Cash Flows Statements 10 false false R11.htm 9952159 - Disclosure - Basis Of Presentation Sheet http://www.dolby.com/role/BasisOfPresentation Basis Of Presentation Notes 11 false false R12.htm 9952160 - Disclosure - Summary Of Significant Accounting Policies Sheet http://www.dolby.com/role/SummaryOfSignificantAccountingPolicies Summary Of Significant Accounting Policies Notes 12 false false R13.htm 9952161 - Disclosure - Revenue Recognition Sheet http://www.dolby.com/role/RevenueRecognition Revenue Recognition Notes 13 false false R14.htm 9952162 - Disclosure - Composition Of Certain Financial Statement Captions Sheet http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptions Composition Of Certain Financial Statement Captions Notes 14 false false R15.htm 9952163 - Disclosure - Fair Value Measurements Sheet http://www.dolby.com/role/FairValueMeasurements Fair Value Measurements Notes 15 false false R16.htm 9952164 - Disclosure - Property, Plant & Equipment Sheet http://www.dolby.com/role/PropertyPlantEquipment Property, Plant & Equipment Notes 16 false false R17.htm 9952165 - Disclosure - Leases Sheet http://www.dolby.com/role/Leases Leases Notes 17 false false R18.htm 9952166 - Disclosure - Goodwill & Intangible Assets Sheet http://www.dolby.com/role/GoodwillIntangibleAssets Goodwill & Intangible Assets Notes 18 false false R19.htm 9952167 - Disclosure - Stockholders' Equity And Stock-Based Compensation Sheet http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensation Stockholders' Equity And Stock-Based Compensation Notes 19 false false R20.htm 9952168 - Disclosure - Accumulated Other Comprehensive Income Sheet http://www.dolby.com/role/AccumulatedOtherComprehensiveIncome Accumulated Other Comprehensive Income Notes 20 false false R21.htm 9952169 - Disclosure - Earnings Per Share Sheet http://www.dolby.com/role/EarningsPerShare Earnings Per Share Notes 21 false false R22.htm 9952170 - Disclosure - Income Taxes Sheet http://www.dolby.com/role/IncomeTaxes Income Taxes Notes 22 false false R23.htm 9952171 - Disclosure - Restructuring Sheet http://www.dolby.com/role/Restructuring Restructuring Notes 23 false false R24.htm 9952172 - Disclosure - Commitments And Contingencies Sheet http://www.dolby.com/role/CommitmentsAndContingencies Commitments And Contingencies Notes 24 false false R25.htm 9952173 - Disclosure - Business Combinations Sheet http://www.dolby.com/role/BusinessCombinations Business Combinations Notes 25 false false R26.htm 9952174 - Disclosure - Operating Segments and Geographic Data Sheet http://www.dolby.com/role/OperatingSegmentsandGeographicData Operating Segments and Geographic Data Notes 26 false false R27.htm 9952175 - Disclosure - Legal Matters Sheet http://www.dolby.com/role/LegalMatters Legal Matters Notes 27 false false R28.htm 9952176 - Disclosure - Related Party Transactions Sheet http://www.dolby.com/role/RelatedPartyTransactions Related Party Transactions Notes 28 false false R29.htm 9952177 - Disclosure - Retirement Plans Sheet http://www.dolby.com/role/RetirementPlans Retirement Plans Notes 29 false false R30.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 30 false false R31.htm 995447 - Disclosure - Insider Trading Policies and Procedures Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc Insider Trading Policies and Procedures Notes 31 false false R32.htm 995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure Sheet http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure Cybersecurity Risk Management and Strategy Disclosure Notes 32 false false R33.htm 9955511 - Disclosure - Basis Of Presentation (Policies) Sheet http://www.dolby.com/role/BasisOfPresentationPolicies Basis Of Presentation (Policies) Policies http://www.dolby.com/role/SummaryOfSignificantAccountingPolicies 33 false false R34.htm 9955512 - Disclosure - Summary Of Significant Accounting Policies (Policies) Sheet http://www.dolby.com/role/SummaryOfSignificantAccountingPoliciesPolicies Summary Of Significant Accounting Policies (Policies) Policies http://www.dolby.com/role/SummaryOfSignificantAccountingPolicies 34 false false R35.htm 9955513 - Disclosure - Summary Of Significant Accounting Policies (Tables) Sheet http://www.dolby.com/role/SummaryOfSignificantAccountingPoliciesTables Summary Of Significant Accounting Policies (Tables) Tables http://www.dolby.com/role/SummaryOfSignificantAccountingPolicies 35 false false R36.htm 9955514 - Disclosure - Revenue Recognition (Tables) Sheet http://www.dolby.com/role/RevenueRecognitionTables Revenue Recognition (Tables) Tables http://www.dolby.com/role/RevenueRecognition 36 false false R37.htm 9955515 - Disclosure - Composition Of Certain Financial Statement Captions (Tables) Sheet http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptionsTables Composition Of Certain Financial Statement Captions (Tables) Tables http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptions 37 false false R38.htm 9955516 - Disclosure - Investments and Fair Value Measurements (Tables) Sheet http://www.dolby.com/role/InvestmentsandFairValueMeasurementsTables Investments and Fair Value Measurements (Tables) Tables 38 false false R39.htm 9955517 - Disclosure - Property, Plant & Equipment (Tables) Sheet http://www.dolby.com/role/PropertyPlantEquipmentTables Property, Plant & Equipment (Tables) Tables http://www.dolby.com/role/PropertyPlantEquipment 39 false false R40.htm 9955518 - Disclosure - Leases (Tables) Sheet http://www.dolby.com/role/LeasesTables Leases (Tables) Tables http://www.dolby.com/role/Leases 40 false false R41.htm 9955519 - Disclosure - Goodwill & Intangible Assets (Tables) Sheet http://www.dolby.com/role/GoodwillIntangibleAssetsTables Goodwill & Intangible Assets (Tables) Tables http://www.dolby.com/role/GoodwillIntangibleAssets 41 false false R42.htm 9955520 - Disclosure - Stockholders' Equity And Stock-Based Compensation (Tables) Sheet http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationTables Stockholders' Equity And Stock-Based Compensation (Tables) Tables http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensation 42 false false R43.htm 9955521 - Disclosure - Accumulated Other Comprehensive Income (Tables) Sheet http://www.dolby.com/role/AccumulatedOtherComprehensiveIncomeTables Accumulated Other Comprehensive Income (Tables) Tables http://www.dolby.com/role/AccumulatedOtherComprehensiveIncome 43 false false R44.htm 9955522 - Disclosure - Per Share Data (Tables) Sheet http://www.dolby.com/role/PerShareDataTables Per Share Data (Tables) Tables 44 false false R45.htm 9955523 - Disclosure - Income Taxes (Tables) Sheet http://www.dolby.com/role/IncomeTaxesTables Income Taxes (Tables) Tables http://www.dolby.com/role/IncomeTaxes 45 false false R46.htm 9955524 - Disclosure - Restructuring (Tables) Sheet http://www.dolby.com/role/RestructuringTables Restructuring (Tables) Tables http://www.dolby.com/role/Restructuring 46 false false R47.htm 9955525 - Disclosure - Commitments And Contingencies (Tables) Sheet http://www.dolby.com/role/CommitmentsAndContingenciesTables Commitments And Contingencies (Tables) Tables http://www.dolby.com/role/CommitmentsAndContingencies 47 false false R48.htm 9955526 - Disclosure - Business Combination (Tables) Sheet http://www.dolby.com/role/BusinessCombinationTables Business Combination (Tables) Tables http://www.dolby.com/role/BusinessCombinations 48 false false R49.htm 9955527 - Disclosure - Operating Segments and Geographic Data (Tables) Sheet http://www.dolby.com/role/OperatingSegmentsandGeographicDataTables Operating Segments and Geographic Data (Tables) Tables http://www.dolby.com/role/OperatingSegmentsandGeographicData 49 false false R50.htm 9955528 - Disclosure - Related Party Transactions (Tables) Sheet http://www.dolby.com/role/RelatedPartyTransactionsTables Related Party Transactions (Tables) Tables http://www.dolby.com/role/RelatedPartyTransactions 50 false false R51.htm 9955529 - Disclosure - Retirement Plans Retirement Plans (Tables) Sheet http://www.dolby.com/role/RetirementPlansRetirementPlansTables Retirement Plans Retirement Plans (Tables) Tables 51 false false R52.htm 9955530 - Disclosure - Summary Of Significant Accounting Policies (Narrative) (Details) Sheet http://www.dolby.com/role/SummaryOfSignificantAccountingPoliciesNarrativeDetails Summary Of Significant Accounting Policies (Narrative) (Details) Details http://www.dolby.com/role/SummaryOfSignificantAccountingPoliciesTables 52 false false R53.htm 9955531 - Disclosure - Summary Of Significant Accounting Policies (Schedule Of Property, Plant, And Equipment, Estimated Useful Life) (Details) Sheet http://www.dolby.com/role/SummaryOfSignificantAccountingPoliciesScheduleOfPropertyPlantAndEquipmentEstimatedUsefulLifeDetails Summary Of Significant Accounting Policies (Schedule Of Property, Plant, And Equipment, Estimated Useful Life) (Details) Details http://www.dolby.com/role/SummaryOfSignificantAccountingPoliciesTables 53 false false R54.htm 9955532 - Disclosure - Revenue Recognition (Narrative) (Details) Sheet http://www.dolby.com/role/RevenueRecognitionNarrativeDetails Revenue Recognition (Narrative) (Details) Details http://www.dolby.com/role/RevenueRecognitionTables 54 false false R55.htm 9955533 - Disclosure - Revenue Recognition (Performance Obligation) (Details) Sheet http://www.dolby.com/role/RevenueRecognitionPerformanceObligationDetails Revenue Recognition (Performance Obligation) (Details) Details http://www.dolby.com/role/RevenueRecognitionTables 55 false false R56.htm 9955534 - Disclosure - Revenue Recognition (Schedule of Disaggregation of Revenue) (Details) Sheet http://www.dolby.com/role/RevenueRecognitionScheduleofDisaggregationofRevenueDetails Revenue Recognition (Schedule of Disaggregation of Revenue) (Details) Details http://www.dolby.com/role/RevenueRecognitionTables 56 false false R57.htm 9955535 - Disclosure - Revenue Recognition (Summary of Contract Assets and Liabilities) (Details) Sheet http://www.dolby.com/role/RevenueRecognitionSummaryofContractAssetsandLiabilitiesDetails Revenue Recognition (Summary of Contract Assets and Liabilities) (Details) Details http://www.dolby.com/role/RevenueRecognitionTables 57 false false R58.htm 9955536 - Disclosure - Composition Of Certain Financial Statement Captions (Narrative) (Details) Sheet http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptionsNarrativeDetails Composition Of Certain Financial Statement Captions (Narrative) (Details) Details http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptionsTables 58 false false R59.htm 9955537 - Disclosure - Composition Of Certain Financial Statement Captions (Schedule Of Accounts Receivable) (Details) Sheet http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptionsScheduleOfAccountsReceivableDetails Composition Of Certain Financial Statement Captions (Schedule Of Accounts Receivable) (Details) Details http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptionsTables 59 false false R60.htm 9955538 - Disclosure - Composition Of Certain Financial Statement Captions (Schedule Of Allowance For Doubtful Accounts) (Details) Sheet http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptionsScheduleOfAllowanceForDoubtfulAccountsDetails Composition Of Certain Financial Statement Captions (Schedule Of Allowance For Doubtful Accounts) (Details) Details http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptionsTables 60 false false R61.htm 9955539 - Disclosure - Composition Of Certain Financial Statement Captions (Schedule Of Inventories) (Details) Sheet http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptionsScheduleOfInventoriesDetails Composition Of Certain Financial Statement Captions (Schedule Of Inventories) (Details) Details http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptionsTables 61 false false R62.htm 9955540 - Disclosure - Composition Of Certain Financial Statement Captions (Schedule Of Prepaid Expenses And Other Current Assets) (Details) Sheet http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptionsScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails Composition Of Certain Financial Statement Captions (Schedule Of Prepaid Expenses And Other Current Assets) (Details) Details http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptionsTables 62 false false R63.htm 9955541 - Disclosure - Composition Of Certain Financial Statement Captions (Schedule Of Accrued Liabilities) (Details) Sheet http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptionsScheduleOfAccruedLiabilitiesDetails Composition Of Certain Financial Statement Captions (Schedule Of Accrued Liabilities) (Details) Details http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptionsTables 63 false false R64.htm 9955542 - Disclosure - Composition Of Certain Financial Statement Captions (Schedule Of Other Non-Current Liabilities) (Details) Sheet http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptionsScheduleOfOtherNonCurrentLiabilitiesDetails Composition Of Certain Financial Statement Captions (Schedule Of Other Non-Current Liabilities) (Details) Details http://www.dolby.com/role/CompositionOfCertainFinancialStatementCaptionsTables 64 false false R65.htm 9955543 - Disclosure - Investments and Fair Value Measurements (Schedule Of Financial Assets Carried At Fair Value) (Details) Sheet http://www.dolby.com/role/InvestmentsandFairValueMeasurementsScheduleOfFinancialAssetsCarriedAtFairValueDetails Investments and Fair Value Measurements (Schedule Of Financial Assets Carried At Fair Value) (Details) Details http://www.dolby.com/role/InvestmentsandFairValueMeasurementsTables 65 false false R66.htm 9955544 - Disclosure - Investments & Fair Value Measurements - AFS Maturities (Details) Sheet http://www.dolby.com/role/InvestmentsFairValueMeasurementsAFSMaturitiesDetails Investments & Fair Value Measurements - AFS Maturities (Details) Details 66 false false R67.htm 9955545 - Disclosure - Investments and Fair Value Measurements (Narrative) (Details) Sheet http://www.dolby.com/role/InvestmentsandFairValueMeasurementsNarrativeDetails Investments and Fair Value Measurements (Narrative) (Details) Details http://www.dolby.com/role/InvestmentsandFairValueMeasurementsTables 67 false false R68.htm 9955546 - Disclosure - Property, Plant & Equipment (Details) Sheet http://www.dolby.com/role/PropertyPlantEquipmentDetails Property, Plant & Equipment (Details) Details http://www.dolby.com/role/PropertyPlantEquipmentTables 68 false false R69.htm 9955547 - Disclosure - Leases (Narrative) (Details) Sheet http://www.dolby.com/role/LeasesNarrativeDetails Leases (Narrative) (Details) Details http://www.dolby.com/role/LeasesTables 69 false false R70.htm 9955548 - Disclosure - Leases (Lease Cost Components) (Details) Sheet http://www.dolby.com/role/LeasesLeaseCostComponentsDetails Leases (Lease Cost Components) (Details) Details http://www.dolby.com/role/LeasesTables 70 false false R71.htm 9955549 - Disclosure - Leases (Supplemental Cash Flow Information Schedule) (Details) Sheet http://www.dolby.com/role/LeasesSupplementalCashFlowInformationScheduleDetails Leases (Supplemental Cash Flow Information Schedule) (Details) Details http://www.dolby.com/role/LeasesTables 71 false false R72.htm 9955550 - Disclosure - Leases (Supplemental Balance Sheet Information Schedule) (Details) Sheet http://www.dolby.com/role/LeasesSupplementalBalanceSheetInformationScheduleDetails Leases (Supplemental Balance Sheet Information Schedule) (Details) Details http://www.dolby.com/role/LeasesTables 72 false false R73.htm 9955551 - Disclosure - Leases (Maturities of Lessee Lease Liabilities Schedule) (Details) Sheet http://www.dolby.com/role/LeasesMaturitiesofLesseeLeaseLiabilitiesScheduleDetails Leases (Maturities of Lessee Lease Liabilities Schedule) (Details) Details http://www.dolby.com/role/LeasesTables 73 false false R74.htm 9955552 - Disclosure - Leases (Maturities of Lessor Lease Payments Schedule) (Details) Sheet http://www.dolby.com/role/LeasesMaturitiesofLessorLeasePaymentsScheduleDetails Leases (Maturities of Lessor Lease Payments Schedule) (Details) Details http://www.dolby.com/role/LeasesTables 74 false false R75.htm 9955553 - Disclosure - Goodwill & Intangible Assets (Details) Sheet http://www.dolby.com/role/GoodwillIntangibleAssetsDetails Goodwill & Intangible Assets (Details) Details http://www.dolby.com/role/GoodwillIntangibleAssetsTables 75 false false R76.htm 9955554 - Disclosure - Goodwill & Intangible Assets - Future Amortization of Intangible Assets (Details) Sheet http://www.dolby.com/role/GoodwillIntangibleAssetsFutureAmortizationofIntangibleAssetsDetails Goodwill & Intangible Assets - Future Amortization of Intangible Assets (Details) Details 76 false false R77.htm 9955555 - Disclosure - Stockholders' Equity And Stock-Based Compensation (Summary Of Information On Performance-Based Restricted Stock Units Granted To Executive Officers That Have Not Yet Vested) (Details) Sheet http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationSummaryOfInformationOnPerformanceBasedRestrictedStockUnitsGrantedToExecutiveOfficersThatHaveNotYetVestedDetails Stockholders' Equity And Stock-Based Compensation (Summary Of Information On Performance-Based Restricted Stock Units Granted To Executive Officers That Have Not Yet Vested) (Details) Details http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationTables 77 false false R78.htm 9955556 - Disclosure - Stockholders' Equity And Stock-Based Compensation (Narrative) (Details) Sheet http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationNarrativeDetails Stockholders' Equity And Stock-Based Compensation (Narrative) (Details) Details http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationTables 78 false false R79.htm 9955557 - Disclosure - Stockholders' Equity And Stock-Based Compensation (Summary Of Stock Options Issued To Officers, Directors, And Employees Under 2000 Stock Incentive Plan And 2005 Stock Plan) (Details) Sheet http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationSummaryOfStockOptionsIssuedToOfficersDirectorsAndEmployeesUnder2000StockIncentivePlanAnd2005StockPlanDetails Stockholders' Equity And Stock-Based Compensation (Summary Of Stock Options Issued To Officers, Directors, And Employees Under 2000 Stock Incentive Plan And 2005 Stock Plan) (Details) Details http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationTables 79 false false R80.htm 9955558 - Disclosure - Stockholders' Equity And Stock-Based Compensation (Summary Of Restricted Stock Units Issued To Officers, Directors, And Employees Under 2005 Stock Incentive Plan) (Details) Sheet http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationSummaryOfRestrictedStockUnitsIssuedToOfficersDirectorsAndEmployeesUnder2005StockIncentivePlanDetails Stockholders' Equity And Stock-Based Compensation (Summary Of Restricted Stock Units Issued To Officers, Directors, And Employees Under 2005 Stock Incentive Plan) (Details) Details http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationTables 80 false false R81.htm 9955559 - Disclosure - Stockholders' Equity And Stock-Based Compensation (RSU Vest Date Fair Value) (Details) Sheet http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationRSUVestDateFairValueDetails Stockholders' Equity And Stock-Based Compensation (RSU Vest Date Fair Value) (Details) Details http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationTables 81 false false R82.htm 9955560 - Disclosure - Stockholders' Equity And Stock-Based Compensation (Schedule Of Fair Value Of Stock-Based Awards Estimated Using Weighted-Average Assumptions) (Details) Sheet http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationScheduleOfFairValueOfStockBasedAwardsEstimatedUsingWeightedAverageAssumptionsDetails Stockholders' Equity And Stock-Based Compensation (Schedule Of Fair Value Of Stock-Based Awards Estimated Using Weighted-Average Assumptions) (Details) Details http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationTables 82 false false R83.htm 9955561 - Disclosure - Stockholders' Equity And Stock-Based Compensation (Summary Of Weighted-Average Fair Value Of Stock Options Granted And Total Intrinsic Value Of Stock Options Exercised) (Details) Sheet http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationSummaryOfWeightedAverageFairValueOfStockOptionsGrantedAndTotalIntrinsicValueOfStockOptionsExercisedDetails Stockholders' Equity And Stock-Based Compensation (Summary Of Weighted-Average Fair Value Of Stock Options Granted And Total Intrinsic Value Of Stock Options Exercised) (Details) Details http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationTables 83 false false R84.htm 9955562 - Disclosure - Stockholders' Equity And Stock-Based Compensation (Forfeiture Rates) (Details) Sheet http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationForfeitureRatesDetails Stockholders' Equity And Stock-Based Compensation (Forfeiture Rates) (Details) Details http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationTables 84 false false R85.htm 9955563 - Disclosure - Stockholders' Equity And Stock-Based Compensation (Schedule Of Stock-Based Compensation Expense By Plan) (Details) Sheet http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationScheduleOfStockBasedCompensationExpenseByPlanDetails Stockholders' Equity And Stock-Based Compensation (Schedule Of Stock-Based Compensation Expense By Plan) (Details) Details http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationTables 85 false false R86.htm 9955564 - Disclosure - Stockholders' Equity And Stock-Based Compensation (Schedule of Stock-Based Compensation By Classification) (Details) Sheet http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationScheduleofStockBasedCompensationByClassificationDetails Stockholders' Equity And Stock-Based Compensation (Schedule of Stock-Based Compensation By Classification) (Details) Details http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationTables 86 false false R87.htm 9955565 - Disclosure - Stockholders' Equity And Stock-Based Compensation (Stock Repurchase) (Details) Sheet http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationStockRepurchaseDetails Stockholders' Equity And Stock-Based Compensation (Stock Repurchase) (Details) Details http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationTables 87 false false R88.htm 9955566 - Disclosure - Stockholders' Equity And Stock-Based Compensation Stockholders' Equity And Stock- Based Compensation - Dividends Declared (Details) Sheet http://www.dolby.com/role/StockholdersEquityAndStockBasedCompensationStockholdersEquityAndStockBasedCompensationDividendsDeclaredDetails Stockholders' Equity And Stock-Based Compensation Stockholders' Equity And Stock- Based Compensation - Dividends Declared (Details) Details 88 false false R89.htm 9955567 - Disclosure - Accumulated Other Comprehensive Income (Details) Sheet http://www.dolby.com/role/AccumulatedOtherComprehensiveIncomeDetails Accumulated Other Comprehensive Income (Details) Details http://www.dolby.com/role/AccumulatedOtherComprehensiveIncomeTables 89 false false R90.htm 9955568 - Disclosure - Per Share Data (Details) Sheet http://www.dolby.com/role/PerShareDataDetails Per Share Data (Details) Details http://www.dolby.com/role/PerShareDataTables 90 false false R91.htm 9955569 - Disclosure - Income Taxes (Narrative) (Details) Sheet http://www.dolby.com/role/IncomeTaxesNarrativeDetails Income Taxes (Narrative) (Details) Details http://www.dolby.com/role/IncomeTaxesTables 91 false false R92.htm 9955570 - Disclosure - Income Taxes (Components Of Income Before Provision For Income Taxes) (Details) Sheet http://www.dolby.com/role/IncomeTaxesComponentsOfIncomeBeforeProvisionForIncomeTaxesDetails Income Taxes (Components Of Income Before Provision For Income Taxes) (Details) Details http://www.dolby.com/role/IncomeTaxesTables 92 false false R93.htm 9955571 - Disclosure - Income Taxes (Schedule Of Provision For Income Taxes ) (Details) Sheet http://www.dolby.com/role/IncomeTaxesScheduleOfProvisionForIncomeTaxesDetails Income Taxes (Schedule Of Provision For Income Taxes ) (Details) Details http://www.dolby.com/role/IncomeTaxesTables 93 false false R94.htm 9955572 - Disclosure - Income Taxes (Summary Of Tax Effects Of The Temporary Differences Between Carrying Amounts And Amounts Used For Tax) (Details) Sheet http://www.dolby.com/role/IncomeTaxesSummaryOfTaxEffectsOfTheTemporaryDifferencesBetweenCarryingAmountsAndAmountsUsedForTaxDetails Income Taxes (Summary Of Tax Effects Of The Temporary Differences Between Carrying Amounts And Amounts Used For Tax) (Details) Details http://www.dolby.com/role/IncomeTaxesTables 94 false false R95.htm 9955573 - Disclosure - Income Taxes (Reconciliation Of Federal Statutory Tax Rate To Our Effective Tax Rate) (Details) Sheet http://www.dolby.com/role/IncomeTaxesReconciliationOfFederalStatutoryTaxRateToOurEffectiveTaxRateDetails Income Taxes (Reconciliation Of Federal Statutory Tax Rate To Our Effective Tax Rate) (Details) Details http://www.dolby.com/role/IncomeTaxesTables 95 false false R96.htm 9955574 - Disclosure - Income Taxes (Aggregate Changes In Balance Of Gross Unrecognized Tax Benefits, Excluding Interest And Penalties) (Details) Sheet http://www.dolby.com/role/IncomeTaxesAggregateChangesInBalanceOfGrossUnrecognizedTaxBenefitsExcludingInterestAndPenaltiesDetails Income Taxes (Aggregate Changes In Balance Of Gross Unrecognized Tax Benefits, Excluding Interest And Penalties) (Details) Details http://www.dolby.com/role/IncomeTaxesTables 96 false false R97.htm 9955575 - Disclosure - Income Taxes (Interest and Penalties on Unrecognized Tax Benefits) (Details) Sheet http://www.dolby.com/role/IncomeTaxesInterestandPenaltiesonUnrecognizedTaxBenefitsDetails Income Taxes (Interest and Penalties on Unrecognized Tax Benefits) (Details) Details http://www.dolby.com/role/IncomeTaxesTables 97 false false R98.htm 9955576 - Disclosure - Restructuring (Narrative) (Details) Sheet http://www.dolby.com/role/RestructuringNarrativeDetails Restructuring (Narrative) (Details) Details http://www.dolby.com/role/RestructuringTables 98 false false R99.htm 9955577 - Disclosure - Restructuring (Summary of Changes in Restructuring Accruals) (Details) Sheet http://www.dolby.com/role/RestructuringSummaryofChangesinRestructuringAccrualsDetails Restructuring (Summary of Changes in Restructuring Accruals) (Details) Details http://www.dolby.com/role/RestructuringTables 99 false false R100.htm 9955579 - Disclosure - Commitments And Contingencies (Schedule Of Contractual Obligations And Commitments) (Details) Sheet http://www.dolby.com/role/CommitmentsAndContingenciesScheduleOfContractualObligationsAndCommitmentsDetails Commitments And Contingencies (Schedule Of Contractual Obligations And Commitments) (Details) Details http://www.dolby.com/role/CommitmentsAndContingenciesTables 100 false false R101.htm 9955580 - Disclosure - Business Combination (Additional Information) (Details) Sheet http://www.dolby.com/role/BusinessCombinationAdditionalInformationDetails Business Combination (Additional Information) (Details) Details http://www.dolby.com/role/BusinessCombinationTables 101 false false R102.htm 9955581 - Disclosure - Business Combination (Total Consideration for the Acquisition) (Details) Sheet http://www.dolby.com/role/BusinessCombinationTotalConsiderationfortheAcquisitionDetails Business Combination (Total Consideration for the Acquisition) (Details) Details http://www.dolby.com/role/BusinessCombinationTables 102 false false R103.htm 9955582 - Disclosure - Business Combination (Recognized Identifiable Assets Acquired and Liabilities Assumed) (Details) Sheet http://www.dolby.com/role/BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedDetails Business Combination (Recognized Identifiable Assets Acquired and Liabilities Assumed) (Details) Details http://www.dolby.com/role/BusinessCombinationTables 103 false false R104.htm 9955583 - Disclosure - Business Combination (Intangible Assets Acquired) (Details) Sheet http://www.dolby.com/role/BusinessCombinationIntangibleAssetsAcquiredDetails Business Combination (Intangible Assets Acquired) (Details) Details http://www.dolby.com/role/BusinessCombinationTables 104 false false R105.htm 9955584 - Disclosure - Operating Segments and Geographic Data (Financial Information and Significant Segment Expenses) (Details) Sheet http://www.dolby.com/role/OperatingSegmentsandGeographicDataFinancialInformationandSignificantSegmentExpensesDetails Operating Segments and Geographic Data (Financial Information and Significant Segment Expenses) (Details) Details http://www.dolby.com/role/OperatingSegmentsandGeographicDataTables 105 false false R106.htm 9955585 - Disclosure - Operating Segments and Geographic Data (Revenue By Geographic Region) (Details) Sheet http://www.dolby.com/role/OperatingSegmentsandGeographicDataRevenueByGeographicRegionDetails Operating Segments and Geographic Data (Revenue By Geographic Region) (Details) Details http://www.dolby.com/role/OperatingSegmentsandGeographicDataTables 106 false false R107.htm 9955586 - Disclosure - Operating Segments and Geographic Data (Schedule Of Concentration Of Revenue From Individual Geographic Regions) (Details) Sheet http://www.dolby.com/role/OperatingSegmentsandGeographicDataScheduleOfConcentrationOfRevenueFromIndividualGeographicRegionsDetails Operating Segments and Geographic Data (Schedule Of Concentration Of Revenue From Individual Geographic Regions) (Details) Details http://www.dolby.com/role/OperatingSegmentsandGeographicDataTables 107 false false R108.htm 9955587 - Disclosure - Operating Segments and Geographic Data (Schedule Of Long-Lived Assets, Net Of Accumulated Depreciation, By Geographic Region) (Details) Sheet http://www.dolby.com/role/OperatingSegmentsandGeographicDataScheduleOfLongLivedAssetsNetOfAccumulatedDepreciationByGeographicRegionDetails Operating Segments and Geographic Data (Schedule Of Long-Lived Assets, Net Of Accumulated Depreciation, By Geographic Region) (Details) Details http://www.dolby.com/role/OperatingSegmentsandGeographicDataTables 108 false false R109.htm 9955588 - Disclosure - Related Party Transactions (Details) Sheet http://www.dolby.com/role/RelatedPartyTransactionsDetails Related Party Transactions (Details) Details http://www.dolby.com/role/RelatedPartyTransactionsTables 109 false false R110.htm 9955589 - Disclosure - Retirement Plans (Details) Sheet http://www.dolby.com/role/RetirementPlansDetails Retirement Plans (Details) Details http://www.dolby.com/role/RetirementPlansRetirementPlansTables 110 false false All Reports Book All Reports dlb-20250926.htm dlb-20250926.xsd dlb-20250926_cal.xml dlb-20250926_def.xml dlb-20250926_lab.xml dlb-20250926_pre.xml dlb-20250926_g1.jpg dlb-20250926_g2.jpg http://fasb.org/srt/2025 http://fasb.org/us-gaap/2025 http://xbrl.sec.gov/cyd/2025 http://xbrl.sec.gov/dei/2025 http://xbrl.sec.gov/ecd/2025 true true