3.22.1 html 247 287 1 false 72 0 false 9 false false R1.htm 0001001 - Document - Cover Page Sheet http://www.illumina.com/role/CoverPage Cover Page Cover 1 false false R2.htm 1001002 - Statement - Condensed Consolidated Balance Sheets Sheet http://www.illumina.com/role/CondensedConsolidatedBalanceSheets Condensed Consolidated Balance Sheets Statements 2 false false R3.htm 1002003 - Statement - Condensed Consolidated Statements of Income Sheet http://www.illumina.com/role/CondensedConsolidatedStatementsofIncome Condensed Consolidated Statements of Income Statements 3 false false R4.htm 1003004 - Statement - Condensed Consolidated Statements of Comprehensive Income Sheet http://www.illumina.com/role/CondensedConsolidatedStatementsofComprehensiveIncome Condensed Consolidated Statements of Comprehensive Income Statements 4 false false R5.htm 1004005 - Statement - Condensed Consolidated Statements of Stockholders??? Equity Sheet http://www.illumina.com/role/CondensedConsolidatedStatementsofStockholdersEquity Condensed Consolidated Statements of Stockholders??? Equity Statements 5 false false R6.htm 1005006 - Statement - Condensed Consolidated Statements of Cash Flows Sheet http://www.illumina.com/role/CondensedConsolidatedStatementsofCashFlows Condensed Consolidated Statements of Cash Flows Statements 6 false false R7.htm 2101101 - Disclosure - Organization and Significant Accounting Policies Sheet http://www.illumina.com/role/OrganizationandSignificantAccountingPolicies Organization and Significant Accounting Policies Notes 7 false false R8.htm 2106102 - Disclosure - Revenue Sheet http://www.illumina.com/role/Revenue Revenue Notes 8 false false R9.htm 2111103 - Disclosure - Investments and Fair Value Measurements Sheet http://www.illumina.com/role/InvestmentsandFairValueMeasurements Investments and Fair Value Measurements Notes 9 false false R10.htm 2117104 - Disclosure - Debt Sheet http://www.illumina.com/role/Debt Debt Notes 10 false false R11.htm 2122105 - Disclosure - Stockholders??? Equity Sheet http://www.illumina.com/role/StockholdersEquity Stockholders??? Equity Notes 11 false false R12.htm 2133106 - Disclosure - Supplemental Balance Sheet Details Sheet http://www.illumina.com/role/SupplementalBalanceSheetDetails Supplemental Balance Sheet Details Notes 12 false false R13.htm 2141107 - Disclosure - Legal Proceedings Sheet http://www.illumina.com/role/LegalProceedings Legal Proceedings Notes 13 false false R14.htm 2143108 - Disclosure - Income Taxes Sheet http://www.illumina.com/role/IncomeTaxes Income Taxes Notes 14 false false R15.htm 2145109 - Disclosure - Segment Information Sheet http://www.illumina.com/role/SegmentInformation Segment Information Notes 15 false false R16.htm 2202201 - Disclosure - Organization and Significant Accounting Policies (Policies) Sheet http://www.illumina.com/role/OrganizationandSignificantAccountingPoliciesPolicies Organization and Significant Accounting Policies (Policies) Policies http://www.illumina.com/role/OrganizationandSignificantAccountingPolicies 16 false false R17.htm 2303301 - Disclosure - Organization and Significant Accounting Policies (Tables) Sheet http://www.illumina.com/role/OrganizationandSignificantAccountingPoliciesTables Organization and Significant Accounting Policies (Tables) Tables http://www.illumina.com/role/OrganizationandSignificantAccountingPolicies 17 false false R18.htm 2307302 - Disclosure - Revenue (Tables) Sheet http://www.illumina.com/role/RevenueTables Revenue (Tables) Tables http://www.illumina.com/role/Revenue 18 false false R19.htm 2312303 - Disclosure - Investments and Fair Value Measurements (Tables) Sheet http://www.illumina.com/role/InvestmentsandFairValueMeasurementsTables Investments and Fair Value Measurements (Tables) Tables http://www.illumina.com/role/InvestmentsandFairValueMeasurements 19 false false R20.htm 2318304 - Disclosure - Debt (Tables) Sheet http://www.illumina.com/role/DebtTables Debt (Tables) Tables http://www.illumina.com/role/Debt 20 false false R21.htm 2323305 - Disclosure - Stockholders??? Equity (Tables) Sheet http://www.illumina.com/role/StockholdersEquityTables Stockholders??? Equity (Tables) Tables http://www.illumina.com/role/StockholdersEquity 21 false false R22.htm 2334306 - Disclosure - Supplemental Balance Sheet Details (Tables) Sheet http://www.illumina.com/role/SupplementalBalanceSheetDetailsTables Supplemental Balance Sheet Details (Tables) Tables http://www.illumina.com/role/SupplementalBalanceSheetDetails 22 false false R23.htm 2346307 - Disclosure - Segment Information (Tables) Sheet http://www.illumina.com/role/SegmentInformationTables Segment Information (Tables) Tables http://www.illumina.com/role/SegmentInformation 23 false false R24.htm 2404401 - Disclosure - Organization and Significant Accounting Policies - Narrative - Accounting Pronouncements Adopted in 2022 (Details) Sheet http://www.illumina.com/role/OrganizationandSignificantAccountingPoliciesNarrativeAccountingPronouncementsAdoptedin2022Details Organization and Significant Accounting Policies - Narrative - Accounting Pronouncements Adopted in 2022 (Details) Details 24 false false R25.htm 2405402 - Disclosure - Organization and Significant Accounting Policies - Summary of Calculation of Weighted Average Shares used to Calculate Basic and Diluted Earnings Per Share (Details) Sheet http://www.illumina.com/role/OrganizationandSignificantAccountingPoliciesSummaryofCalculationofWeightedAverageSharesusedtoCalculateBasicandDilutedEarningsPerShareDetails Organization and Significant Accounting Policies - Summary of Calculation of Weighted Average Shares used to Calculate Basic and Diluted Earnings Per Share (Details) Details 25 false false R26.htm 2408403 - Disclosure - Revenue - Disaggregation of Revenue (Details) Sheet http://www.illumina.com/role/RevenueDisaggregationofRevenueDetails Revenue - Disaggregation of Revenue (Details) Details 26 false false R27.htm 2409404 - Disclosure - Revenue - Remaining Performance Obligation (Details) Sheet http://www.illumina.com/role/RevenueRemainingPerformanceObligationDetails Revenue - Remaining Performance Obligation (Details) Details 27 false false R28.htm 2410405 - Disclosure - Revenue - Narrative (Details) Sheet http://www.illumina.com/role/RevenueNarrativeDetails Revenue - Narrative (Details) Details 28 false false R29.htm 2413406 - Disclosure - Investments and Fair Value Measurements - Narrative (Details) Sheet http://www.illumina.com/role/InvestmentsandFairValueMeasurementsNarrativeDetails Investments and Fair Value Measurements - Narrative (Details) Details 29 false false R30.htm 2414407 - Disclosure - Investments and Fair Value Measurements - Marketable Equity Securities (Details) Sheet http://www.illumina.com/role/InvestmentsandFairValueMeasurementsMarketableEquitySecuritiesDetails Investments and Fair Value Measurements - Marketable Equity Securities (Details) Details 30 false false R31.htm 2415408 - Disclosure - Investments and Fair Value Measurements - Fair Value Hierarchy of Assets and Liabilities (Details) Sheet http://www.illumina.com/role/InvestmentsandFairValueMeasurementsFairValueHierarchyofAssetsandLiabilitiesDetails Investments and Fair Value Measurements - Fair Value Hierarchy of Assets and Liabilities (Details) Details 31 false false R32.htm 2416409 - Disclosure - Investments and Fair Value Measurements - Changes in Estimated Fair Value of Acquisition Related Contingent Consideration Liabilities (Details) Sheet http://www.illumina.com/role/InvestmentsandFairValueMeasurementsChangesinEstimatedFairValueofAcquisitionRelatedContingentConsiderationLiabilitiesDetails Investments and Fair Value Measurements - Changes in Estimated Fair Value of Acquisition Related Contingent Consideration Liabilities (Details) Details 32 false false R33.htm 2419410 - Disclosure - Debt - Summary of Term Debt Obligations (Details) Sheet http://www.illumina.com/role/DebtSummaryofTermDebtObligationsDetails Debt - Summary of Term Debt Obligations (Details) Details 33 false false R34.htm 2420411 - Disclosure - Debt - Narrative (Details) Sheet http://www.illumina.com/role/DebtNarrativeDetails Debt - Narrative (Details) Details 34 false false R35.htm 2421412 - Disclosure - Debt - Summary of Convertible Debt Obligations (Details) Sheet http://www.illumina.com/role/DebtSummaryofConvertibleDebtObligationsDetails Debt - Summary of Convertible Debt Obligations (Details) Details 35 false false R36.htm 2424413 - Disclosure - Stockholders??? Equity - Narrative (Details) Sheet http://www.illumina.com/role/StockholdersEquityNarrativeDetails Stockholders??? Equity - Narrative (Details) Details 36 false false R37.htm 2425414 - Disclosure - Stockholders??? Equity - Summary of Restricted Stock Activity and Related Information (Details) Sheet http://www.illumina.com/role/StockholdersEquitySummaryofRestrictedStockActivityandRelatedInformationDetails Stockholders??? Equity - Summary of Restricted Stock Activity and Related Information (Details) Details 37 false false R38.htm 2426415 - Disclosure - Stockholders??? Equity - Summary of Stock Option Activity Under all Stock Option Plans (Details) Sheet http://www.illumina.com/role/StockholdersEquitySummaryofStockOptionActivityUnderallStockOptionPlansDetails Stockholders??? Equity - Summary of Stock Option Activity Under all Stock Option Plans (Details) Details 38 false false R39.htm 2427416 - Disclosure - Stockholders??? Equity - Narrative - Liability - Classified Award (Details) Sheet http://www.illumina.com/role/StockholdersEquityNarrativeLiabilityClassifiedAwardDetails Stockholders??? Equity - Narrative - Liability - Classified Award (Details) Details 39 false false R40.htm 2428417 - Disclosure - Stockholders??? Equity - Liability - Classified Awards (Details) Sheet http://www.illumina.com/role/StockholdersEquityLiabilityClassifiedAwardsDetails Stockholders??? Equity - Liability - Classified Awards (Details) Details 40 false false R41.htm 2429418 - Disclosure - Stockholders??? Equity - Narrative - Employee Stock Purchase Plan (Details) Sheet http://www.illumina.com/role/StockholdersEquityNarrativeEmployeeStockPurchasePlanDetails Stockholders??? Equity - Narrative - Employee Stock Purchase Plan (Details) Details 41 false false R42.htm 2430419 - Disclosure - Stockholders??? Equity - Narrative - Share Repurchases (Details) Sheet http://www.illumina.com/role/StockholdersEquityNarrativeShareRepurchasesDetails Stockholders??? Equity - Narrative - Share Repurchases (Details) Details 42 false false R43.htm 2431420 - Disclosure - Stockholders??? Equity - Summary of Share-based Compensation Expense for all Stock Awards (Details) Sheet http://www.illumina.com/role/StockholdersEquitySummaryofSharebasedCompensationExpenseforallStockAwardsDetails Stockholders??? Equity - Summary of Share-based Compensation Expense for all Stock Awards (Details) Details 43 false false R44.htm 2432421 - Disclosure - Stockholders??? Equity- Summary of Assumptions Used to Estimate the Weighted Average Fair Value Per Share (Details) Sheet http://www.illumina.com/role/StockholdersEquitySummaryofAssumptionsUsedtoEstimatetheWeightedAverageFairValuePerShareDetails Stockholders??? Equity- Summary of Assumptions Used to Estimate the Weighted Average Fair Value Per Share (Details) Details 44 false false R45.htm 2435422 - Disclosure - Supplemental Balance Sheet Details - Schedule of Accounts Receivable (Details) Sheet http://www.illumina.com/role/SupplementalBalanceSheetDetailsScheduleofAccountsReceivableDetails Supplemental Balance Sheet Details - Schedule of Accounts Receivable (Details) Details 45 false false R46.htm 2436423 - Disclosure - Supplemental Balance Sheet Details - Summary of Inventory (Details) Sheet http://www.illumina.com/role/SupplementalBalanceSheetDetailsSummaryofInventoryDetails Supplemental Balance Sheet Details - Summary of Inventory (Details) Details 46 false false R47.htm 2437424 - Disclosure - Supplemental Balance Sheet Details - Summary of Accrued Liabilities (Details) Sheet http://www.illumina.com/role/SupplementalBalanceSheetDetailsSummaryofAccruedLiabilitiesDetails Supplemental Balance Sheet Details - Summary of Accrued Liabilities (Details) Details 47 false false R48.htm 2438425 - Disclosure - Supplemental Balance Sheet Details - Summary of Changes in Reserve for Product Warranties (Details) Sheet http://www.illumina.com/role/SupplementalBalanceSheetDetailsSummaryofChangesinReserveforProductWarrantiesDetails Supplemental Balance Sheet Details - Summary of Changes in Reserve for Product Warranties (Details) Details 48 false false R49.htm 2439426 - Disclosure - Supplemental Balance Sheet Details - Narrative - Warranties (Details) Sheet http://www.illumina.com/role/SupplementalBalanceSheetDetailsNarrativeWarrantiesDetails Supplemental Balance Sheet Details - Narrative - Warranties (Details) Details 49 false false R50.htm 2440427 - Disclosure - Supplemental Balance Sheet Details - Narrative - Derivatives (Details) Sheet http://www.illumina.com/role/SupplementalBalanceSheetDetailsNarrativeDerivativesDetails Supplemental Balance Sheet Details - Narrative - Derivatives (Details) Details 50 false false R51.htm 2442428 - Disclosure - Legal Proceedings (Details) Sheet http://www.illumina.com/role/LegalProceedingsDetails Legal Proceedings (Details) Details http://www.illumina.com/role/LegalProceedings 51 false false R52.htm 2444429 - Disclosure - Income Taxes (Details) Sheet http://www.illumina.com/role/IncomeTaxesDetails Income Taxes (Details) Details http://www.illumina.com/role/IncomeTaxes 52 false false R53.htm 2447430 - Disclosure - Segment Information - Summary of Operating Performance and Assets by Segment (Details) Sheet http://www.illumina.com/role/SegmentInformationSummaryofOperatingPerformanceandAssetsbySegmentDetails Segment Information - Summary of Operating Performance and Assets by Segment (Details) Details 53 false false All Reports Book All Reports ilmn-20220403.htm fy22q1ex311.htm fy22q1ex312.htm fy22q1ex321.htm fy22q1ex322.htm ilmn-20220403.xsd ilmn-20220403_cal.xml ilmn-20220403_def.xml ilmn-20220403_lab.xml ilmn-20220403_pre.xml ilmn-20220403_g1.jpg http://fasb.org/us-gaap/2021-01-31 http://xbrl.sec.gov/dei/2021q4 true true