3.26.1 html 319 380 1 true 112 0 false 14 false false R1.htm 0000001 - Document - Cover Sheet http://www.nasdaq.com/role/Cover Cover Cover 1 false false R2.htm 9952151 - Statement - Condensed Consolidated Balance Sheets Sheet http://www.nasdaq.com/role/CondensedConsolidatedBalanceSheets Condensed Consolidated Balance Sheets Statements 2 false false R3.htm 9952152 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) Sheet http://www.nasdaq.com/role/CondensedConsolidatedBalanceSheetsParenthetical Condensed Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 9952153 - Statement - Condensed Consolidated Statements of Income Sheet http://www.nasdaq.com/role/CondensedConsolidatedStatementsofIncome Condensed Consolidated Statements of Income Statements 4 false false R5.htm 9952154 - Statement - Condensed Consolidated Statements of Comprehensive Income Sheet http://www.nasdaq.com/role/CondensedConsolidatedStatementsofComprehensiveIncome Condensed Consolidated Statements of Comprehensive Income Statements 5 false false R6.htm 9952155 - Statement - Condensed Consolidated Statements of Changes in Stockholders??? Equity Sheet http://www.nasdaq.com/role/CondensedConsolidatedStatementsofChangesinStockholdersEquity Condensed Consolidated Statements of Changes in Stockholders??? Equity Statements 6 false false R7.htm 9952156 - Statement - Condensed Consolidated Statements of Cash Flows Sheet http://www.nasdaq.com/role/CondensedConsolidatedStatementsofCashFlows Condensed Consolidated Statements of Cash Flows Statements 7 false false R8.htm 9952157 - Disclosure - Organization and Nature of Operations Sheet http://www.nasdaq.com/role/OrganizationandNatureofOperations Organization and Nature of Operations Notes 8 false false R9.htm 9952158 - Disclosure - Basis of Presentation and Principles of Consolidation Sheet http://www.nasdaq.com/role/BasisofPresentationandPrinciplesofConsolidation Basis of Presentation and Principles of Consolidation Notes 9 false false R10.htm 9952159 - Disclosure - Revenue from Contracts with Customers Sheet http://www.nasdaq.com/role/RevenuefromContractswithCustomers Revenue from Contracts with Customers Notes 10 false false R11.htm 9952160 - Disclosure - Divestitures Sheet http://www.nasdaq.com/role/Divestitures Divestitures Notes 11 false false R12.htm 9952161 - Disclosure - Goodwill and Acquired Intangible Assets Sheet http://www.nasdaq.com/role/GoodwillandAcquiredIntangibleAssets Goodwill and Acquired Intangible Assets Notes 12 false false R13.htm 9952162 - Disclosure - Investments Sheet http://www.nasdaq.com/role/Investments Investments Notes 13 false false R14.htm 9952163 - Disclosure - Deferred Revenue Sheet http://www.nasdaq.com/role/DeferredRevenue Deferred Revenue Notes 14 false false R15.htm 9952164 - Disclosure - Debt Obligations Sheet http://www.nasdaq.com/role/DebtObligations Debt Obligations Notes 15 false false R16.htm 9952165 - Disclosure - Retirement Plans Sheet http://www.nasdaq.com/role/RetirementPlans Retirement Plans Notes 16 false false R17.htm 9952166 - Disclosure - Share-Based Compensation Sheet http://www.nasdaq.com/role/ShareBasedCompensation Share-Based Compensation Notes 17 false false R18.htm 9952167 - Disclosure - Nasdaq Stockholders??? Equity Sheet http://www.nasdaq.com/role/NasdaqStockholdersEquity Nasdaq Stockholders??? Equity Notes 18 false false R19.htm 9952168 - Disclosure - Earnings Per Share Sheet http://www.nasdaq.com/role/EarningsPerShare Earnings Per Share Notes 19 false false R20.htm 9952169 - Disclosure - Fair Value of Financial Instruments Sheet http://www.nasdaq.com/role/FairValueofFinancialInstruments Fair Value of Financial Instruments Notes 20 false false R21.htm 9952170 - Disclosure - Clearing Operations Sheet http://www.nasdaq.com/role/ClearingOperations Clearing Operations Notes 21 false false R22.htm 9952171 - Disclosure - Leases Sheet http://www.nasdaq.com/role/Leases Leases Notes 22 false false R23.htm 9952172 - Disclosure - Income Taxes Sheet http://www.nasdaq.com/role/IncomeTaxes Income Taxes Notes 23 false false R24.htm 9952173 - Disclosure - Commitments, Contingencies and Guarantees Sheet http://www.nasdaq.com/role/CommitmentsContingenciesandGuarantees Commitments, Contingencies and Guarantees Notes 24 false false R25.htm 9952174 - Disclosure - Business Segments Sheet http://www.nasdaq.com/role/BusinessSegments Business Segments Notes 25 false false R26.htm 9952175 - Disclosure - Restructuring Charges Sheet http://www.nasdaq.com/role/RestructuringCharges Restructuring Charges Notes 26 false false R27.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 27 false false R28.htm 9955511 - Disclosure - Basis of Presentation and Principles of Consolidation (Policies) Sheet http://www.nasdaq.com/role/BasisofPresentationandPrinciplesofConsolidationPolicies Basis of Presentation and Principles of Consolidation (Policies) Policies 28 false false R29.htm 9955512 - Disclosure - Revenue from Contracts with Customers (Tables) Sheet http://www.nasdaq.com/role/RevenuefromContractswithCustomersTables Revenue from Contracts with Customers (Tables) Tables http://www.nasdaq.com/role/RevenuefromContractswithCustomers 29 false false R30.htm 9955513 - Disclosure - Goodwill and Acquired Intangible Assets (Tables) Sheet http://www.nasdaq.com/role/GoodwillandAcquiredIntangibleAssetsTables Goodwill and Acquired Intangible Assets (Tables) Tables http://www.nasdaq.com/role/GoodwillandAcquiredIntangibleAssets 30 false false R31.htm 9955514 - Disclosure - Investments (Tables) Sheet http://www.nasdaq.com/role/InvestmentsTables Investments (Tables) Tables http://www.nasdaq.com/role/Investments 31 false false R32.htm 9955515 - Disclosure - Deferred Revenue (Tables) Sheet http://www.nasdaq.com/role/DeferredRevenueTables Deferred Revenue (Tables) Tables http://www.nasdaq.com/role/DeferredRevenue 32 false false R33.htm 9955516 - Disclosure - Debt Obligations (Tables) Sheet http://www.nasdaq.com/role/DebtObligationsTables Debt Obligations (Tables) Tables http://www.nasdaq.com/role/DebtObligations 33 false false R34.htm 9955517 - Disclosure - Retirement Plans (Tables) Sheet http://www.nasdaq.com/role/RetirementPlansTables Retirement Plans (Tables) Tables http://www.nasdaq.com/role/RetirementPlans 34 false false R35.htm 9955518 - Disclosure - Share-Based Compensation (Tables) Sheet http://www.nasdaq.com/role/ShareBasedCompensationTables Share-Based Compensation (Tables) Tables http://www.nasdaq.com/role/ShareBasedCompensation 35 false false R36.htm 9955519 - Disclosure - Nasdaq Stockholders??? Equity (Tables) Sheet http://www.nasdaq.com/role/NasdaqStockholdersEquityTables Nasdaq Stockholders??? Equity (Tables) Tables http://www.nasdaq.com/role/NasdaqStockholdersEquity 36 false false R37.htm 9955520 - Disclosure - Earnings Per Share (Tables) Sheet http://www.nasdaq.com/role/EarningsPerShareTables Earnings Per Share (Tables) Tables http://www.nasdaq.com/role/EarningsPerShare 37 false false R38.htm 9955521 - Disclosure - Fair Value of Financial Instruments (Tables) Sheet http://www.nasdaq.com/role/FairValueofFinancialInstrumentsTables Fair Value of Financial Instruments (Tables) Tables http://www.nasdaq.com/role/FairValueofFinancialInstruments 38 false false R39.htm 9955522 - Disclosure - Clearing Operations (Tables) Sheet http://www.nasdaq.com/role/ClearingOperationsTables Clearing Operations (Tables) Tables http://www.nasdaq.com/role/ClearingOperations 39 false false R40.htm 9955523 - Disclosure - Leases (Tables) Sheet http://www.nasdaq.com/role/LeasesTables Leases (Tables) Tables http://www.nasdaq.com/role/Leases 40 false false R41.htm 9955524 - Disclosure - Income Taxes (Tables) Sheet http://www.nasdaq.com/role/IncomeTaxesTables Income Taxes (Tables) Tables http://www.nasdaq.com/role/IncomeTaxes 41 false false R42.htm 9955525 - Disclosure - Business Segments (Tables) Sheet http://www.nasdaq.com/role/BusinessSegmentsTables Business Segments (Tables) Tables http://www.nasdaq.com/role/BusinessSegments 42 false false R43.htm 9955526 - Disclosure - Restructuring Charges (Tables) Sheet http://www.nasdaq.com/role/RestructuringChargesTables Restructuring Charges (Tables) Tables http://www.nasdaq.com/role/RestructuringCharges 43 false false R44.htm 9955527 - Disclosure - Organization and Nature of Operations (Details) Sheet http://www.nasdaq.com/role/OrganizationandNatureofOperationsDetails Organization and Nature of Operations (Details) Details http://www.nasdaq.com/role/OrganizationandNatureofOperations 44 false false R45.htm 9955528 - Disclosure - Revenue from Contracts with Customers (Revenue by Product, Service and Segment) (Details) Sheet http://www.nasdaq.com/role/RevenuefromContractswithCustomersRevenuebyProductServiceandSegmentDetails Revenue from Contracts with Customers (Revenue by Product, Service and Segment) (Details) Details http://www.nasdaq.com/role/RevenuefromContractswithCustomersTables 45 false false R46.htm 9955529 - Disclosure - Revenue from Contracts with Customers (Narrative) (Details) Sheet http://www.nasdaq.com/role/RevenuefromContractswithCustomersNarrativeDetails Revenue from Contracts with Customers (Narrative) (Details) Details http://www.nasdaq.com/role/RevenuefromContractswithCustomersTables 46 false false R47.htm 9955530 - Disclosure - Revenue from Contracts with Customers (Remaining Performance Obligation) (Details) Sheet http://www.nasdaq.com/role/RevenuefromContractswithCustomersRemainingPerformanceObligationDetails Revenue from Contracts with Customers (Remaining Performance Obligation) (Details) Details http://www.nasdaq.com/role/RevenuefromContractswithCustomersTables 47 false false R48.htm 9955531 - Disclosure - Divestitures (Details) Sheet http://www.nasdaq.com/role/DivestituresDetails Divestitures (Details) Details http://www.nasdaq.com/role/Divestitures 48 false false R49.htm 9955532 - Disclosure - Goodwill and Acquired Intangible Assets (Schedule of Changes in Goodwill) (Details) Sheet http://www.nasdaq.com/role/GoodwillandAcquiredIntangibleAssetsScheduleofChangesinGoodwillDetails Goodwill and Acquired Intangible Assets (Schedule of Changes in Goodwill) (Details) Details http://www.nasdaq.com/role/GoodwillandAcquiredIntangibleAssetsTables 49 false false R50.htm 9955533 - Disclosure - Goodwill and Acquired Intangible Assets (Narrative) (Details) Sheet http://www.nasdaq.com/role/GoodwillandAcquiredIntangibleAssetsNarrativeDetails Goodwill and Acquired Intangible Assets (Narrative) (Details) Details http://www.nasdaq.com/role/GoodwillandAcquiredIntangibleAssetsTables 50 false false R51.htm 9955534 - Disclosure - Goodwill and Acquired Intangible Assets (Finite-Lived Intangible Assets) (Details) Sheet http://www.nasdaq.com/role/GoodwillandAcquiredIntangibleAssetsFiniteLivedIntangibleAssetsDetails Goodwill and Acquired Intangible Assets (Finite-Lived Intangible Assets) (Details) Details http://www.nasdaq.com/role/GoodwillandAcquiredIntangibleAssetsTables 51 false false R52.htm 9955535 - Disclosure - Goodwill and Acquired Intangible Assets (Finite-Lived Intangible Assets Amortization Expense) (Details) Sheet http://www.nasdaq.com/role/GoodwillandAcquiredIntangibleAssetsFiniteLivedIntangibleAssetsAmortizationExpenseDetails Goodwill and Acquired Intangible Assets (Finite-Lived Intangible Assets Amortization Expense) (Details) Details http://www.nasdaq.com/role/GoodwillandAcquiredIntangibleAssetsTables 52 false false R53.htm 9955536 - Disclosure - Goodwill and Acquired Intangible Assets (Estimated Future Amortization Expense) (Details) Sheet http://www.nasdaq.com/role/GoodwillandAcquiredIntangibleAssetsEstimatedFutureAmortizationExpenseDetails Goodwill and Acquired Intangible Assets (Estimated Future Amortization Expense) (Details) Details http://www.nasdaq.com/role/GoodwillandAcquiredIntangibleAssetsTables 53 false false R54.htm 9955537 - Disclosure - Investments (Schedule of Investments) (Details) Sheet http://www.nasdaq.com/role/InvestmentsScheduleofInvestmentsDetails Investments (Schedule of Investments) (Details) Details http://www.nasdaq.com/role/InvestmentsTables 54 false false R55.htm 9955538 - Disclosure - Investments (Narrative) (Details) Sheet http://www.nasdaq.com/role/InvestmentsNarrativeDetails Investments (Narrative) (Details) Details http://www.nasdaq.com/role/InvestmentsTables 55 false false R56.htm 9955539 - Disclosure - Deferred Revenue (Changes in Deferred Revenue) (Details) Sheet http://www.nasdaq.com/role/DeferredRevenueChangesinDeferredRevenueDetails Deferred Revenue (Changes in Deferred Revenue) (Details) Details http://www.nasdaq.com/role/DeferredRevenueTables 56 false false R57.htm 9955540 - Disclosure - Deferred Revenue (Estimated Deferred Revenue) (Details) Sheet http://www.nasdaq.com/role/DeferredRevenueEstimatedDeferredRevenueDetails Deferred Revenue (Estimated Deferred Revenue) (Details) Details http://www.nasdaq.com/role/DeferredRevenueTables 57 false false R58.htm 9955541 - Disclosure - Debt Obligations (Changes in Debt Obligations) (Details) Sheet http://www.nasdaq.com/role/DebtObligationsChangesinDebtObligationsDetails Debt Obligations (Changes in Debt Obligations) (Details) Details http://www.nasdaq.com/role/DebtObligationsTables 58 false false R59.htm 9955542 - Disclosure - Debt Obligations (Senior Unsecured Notes and Net Investment Hedge) (Details) Notes http://www.nasdaq.com/role/DebtObligationsSeniorUnsecuredNotesandNetInvestmentHedgeDetails Debt Obligations (Senior Unsecured Notes and Net Investment Hedge) (Details) Details http://www.nasdaq.com/role/DebtObligationsTables 59 false false R60.htm 9955543 - Disclosure - Debt Obligations (Credit Facilities) (Details) Sheet http://www.nasdaq.com/role/DebtObligationsCreditFacilitiesDetails Debt Obligations (Credit Facilities) (Details) Details http://www.nasdaq.com/role/DebtObligationsTables 60 false false R61.htm 9955544 - Disclosure - Debt Obligations (Other Credit Facilities) (Details) Sheet http://www.nasdaq.com/role/DebtObligationsOtherCreditFacilitiesDetails Debt Obligations (Other Credit Facilities) (Details) Details http://www.nasdaq.com/role/DebtObligationsTables 61 false false R62.htm 9955545 - Disclosure - Retirement Plans (Narrative) (Details) Sheet http://www.nasdaq.com/role/RetirementPlansNarrativeDetails Retirement Plans (Narrative) (Details) Details http://www.nasdaq.com/role/RetirementPlansTables 62 false false R63.htm 9955546 - Disclosure - Retirement Plans (Cost of Retirement Plans) (Details) Sheet http://www.nasdaq.com/role/RetirementPlansCostofRetirementPlansDetails Retirement Plans (Cost of Retirement Plans) (Details) Details http://www.nasdaq.com/role/RetirementPlansTables 63 false false R64.htm 9955547 - Disclosure - Share-Based Compensation (Narrative) (Details) Sheet http://www.nasdaq.com/role/ShareBasedCompensationNarrativeDetails Share-Based Compensation (Narrative) (Details) Details http://www.nasdaq.com/role/ShareBasedCompensationTables 64 false false R65.htm 9955548 - Disclosure - Share-Based Compensation (Schedule of Share-Based Compensation Expense) (Details) Sheet http://www.nasdaq.com/role/ShareBasedCompensationScheduleofShareBasedCompensationExpenseDetails Share-Based Compensation (Schedule of Share-Based Compensation Expense) (Details) Details http://www.nasdaq.com/role/ShareBasedCompensationTables 65 false false R66.htm 9955549 - Disclosure - Share-Based Compensation (Schedule of Restricted Stock Activity) (Details) Sheet http://www.nasdaq.com/role/ShareBasedCompensationScheduleofRestrictedStockActivityDetails Share-Based Compensation (Schedule of Restricted Stock Activity) (Details) Details http://www.nasdaq.com/role/ShareBasedCompensationTables 66 false false R67.htm 9955550 - Disclosure - Share-Based Compensation (Schedule of PSU Activity) (Details) Sheet http://www.nasdaq.com/role/ShareBasedCompensationScheduleofPSUActivityDetails Share-Based Compensation (Schedule of PSU Activity) (Details) Details http://www.nasdaq.com/role/ShareBasedCompensationTables 67 false false R68.htm 9955551 - Disclosure - Share-Based Compensation (Schedule of Stock Option Activity) (Details) Sheet http://www.nasdaq.com/role/ShareBasedCompensationScheduleofStockOptionActivityDetails Share-Based Compensation (Schedule of Stock Option Activity) (Details) Details http://www.nasdaq.com/role/ShareBasedCompensationTables 68 false false R69.htm 9955552 - Disclosure - Nasdaq Stockholders' Equity (Narrative) (Details) Sheet http://www.nasdaq.com/role/NasdaqStockholdersEquityNarrativeDetails Nasdaq Stockholders' Equity (Narrative) (Details) Details 69 false false R70.htm 9955553 - Disclosure - Nasdaq Stockholders' Equity (Common Stock in Treasury) (Details) Sheet http://www.nasdaq.com/role/NasdaqStockholdersEquityCommonStockinTreasuryDetails Nasdaq Stockholders' Equity (Common Stock in Treasury) (Details) Details 70 false false R71.htm 9955554 - Disclosure - Nasdaq Stockholders' Equity (Schedule of Dividends Declared) (Details) Sheet http://www.nasdaq.com/role/NasdaqStockholdersEquityScheduleofDividendsDeclaredDetails Nasdaq Stockholders' Equity (Schedule of Dividends Declared) (Details) Details 71 false false R72.htm 9955555 - Disclosure - Earnings Per Share (Details) Sheet http://www.nasdaq.com/role/EarningsPerShareDetails Earnings Per Share (Details) Details http://www.nasdaq.com/role/EarningsPerShareTables 72 false false R73.htm 9955556 - Disclosure - Fair Value of Financial Instruments (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) Sheet http://www.nasdaq.com/role/FairValueofFinancialInstrumentsScheduleofFinancialAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetails Fair Value of Financial Instruments (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) Details http://www.nasdaq.com/role/FairValueofFinancialInstrumentsTables 73 false false R74.htm 9955557 - Disclosure - Fair Value of Financial Instruments (Narrative) (Details) Sheet http://www.nasdaq.com/role/FairValueofFinancialInstrumentsNarrativeDetails Fair Value of Financial Instruments (Narrative) (Details) Details http://www.nasdaq.com/role/FairValueofFinancialInstrumentsTables 74 false false R75.htm 9955558 - Disclosure - Clearing Operations (Schedule of Clearing Member Default Fund Contributions And Margin Deposits) (Details) Sheet http://www.nasdaq.com/role/ClearingOperationsScheduleofClearingMemberDefaultFundContributionsAndMarginDepositsDetails Clearing Operations (Schedule of Clearing Member Default Fund Contributions And Margin Deposits) (Details) Details http://www.nasdaq.com/role/ClearingOperationsTables 75 false false R76.htm 9955559 - Disclosure - Clearing Operations (Narrative) (Details) Sheet http://www.nasdaq.com/role/ClearingOperationsNarrativeDetails Clearing Operations (Narrative) (Details) Details http://www.nasdaq.com/role/ClearingOperationsTables 76 false false R77.htm 9955560 - Disclosure - Clearing Operations (Investment Policy) (Details) Sheet http://www.nasdaq.com/role/ClearingOperationsInvestmentPolicyDetails Clearing Operations (Investment Policy) (Details) Details http://www.nasdaq.com/role/ClearingOperationsTables 77 false false R78.htm 9955561 - Disclosure - Clearing Operations (Schedule of Derivative Contracts) (Details) Sheet http://www.nasdaq.com/role/ClearingOperationsScheduleofDerivativeContractsDetails Clearing Operations (Schedule of Derivative Contracts) (Details) Details http://www.nasdaq.com/role/ClearingOperationsTables 78 false false R79.htm 9955562 - Disclosure - Leases (Summary of Supplemental Balance Sheet Information Related to Operating Leases) (Details) Sheet http://www.nasdaq.com/role/LeasesSummaryofSupplementalBalanceSheetInformationRelatedtoOperatingLeasesDetails Leases (Summary of Supplemental Balance Sheet Information Related to Operating Leases) (Details) Details http://www.nasdaq.com/role/LeasesTables 79 false false R80.htm 9955563 - Disclosure - Leases (Leases Cost) (Details) Sheet http://www.nasdaq.com/role/LeasesLeasesCostDetails Leases (Leases Cost) (Details) Details http://www.nasdaq.com/role/LeasesTables 80 false false R81.htm 9955564 - Disclosure - Leases (Operating Lease Maturity) (Details) Sheet http://www.nasdaq.com/role/LeasesOperatingLeaseMaturityDetails Leases (Operating Lease Maturity) (Details) Details http://www.nasdaq.com/role/LeasesTables 81 false false R82.htm 9955565 - Disclosure - Leases (Narrative) (Details) Sheet http://www.nasdaq.com/role/LeasesNarrativeDetails Leases (Narrative) (Details) Details http://www.nasdaq.com/role/LeasesTables 82 false false R83.htm 9955566 - Disclosure - Leases (Leases Terms and Discount Rate) (Details) Sheet http://www.nasdaq.com/role/LeasesLeasesTermsandDiscountRateDetails Leases (Leases Terms and Discount Rate) (Details) Details http://www.nasdaq.com/role/LeasesTables 83 false false R84.htm 9955567 - Disclosure - Leases (Supplemental Cash Flow Information) (Details) Sheet http://www.nasdaq.com/role/LeasesSupplementalCashFlowInformationDetails Leases (Supplemental Cash Flow Information) (Details) Details http://www.nasdaq.com/role/LeasesTables 84 false false R85.htm 9955568 - Disclosure - Income Taxes (Details) Sheet http://www.nasdaq.com/role/IncomeTaxesDetails Income Taxes (Details) Details http://www.nasdaq.com/role/IncomeTaxesTables 85 false false R86.htm 9955569 - Disclosure - Commitments, Contingencies and Guarantees (Details) Sheet http://www.nasdaq.com/role/CommitmentsContingenciesandGuaranteesDetails Commitments, Contingencies and Guarantees (Details) Details http://www.nasdaq.com/role/CommitmentsContingenciesandGuarantees 86 false false R87.htm 9955570 - Disclosure - Business Segments (Narrative) (Details) Sheet http://www.nasdaq.com/role/BusinessSegmentsNarrativeDetails Business Segments (Narrative) (Details) Details http://www.nasdaq.com/role/BusinessSegmentsTables 87 false false R88.htm 9955571 - Disclosure - Business Segments (Schedule of Operating Segments) (Details) Sheet http://www.nasdaq.com/role/BusinessSegmentsScheduleofOperatingSegmentsDetails Business Segments (Schedule of Operating Segments) (Details) Details http://www.nasdaq.com/role/BusinessSegmentsTables 88 false false R89.htm 9955572 - Disclosure - Business Segments (Corporate Items) (Details) Sheet http://www.nasdaq.com/role/BusinessSegmentsCorporateItemsDetails Business Segments (Corporate Items) (Details) Details http://www.nasdaq.com/role/BusinessSegmentsTables 89 false false R90.htm 9955573 - Disclosure - Business Segments (Geographic Data) (Details) Sheet http://www.nasdaq.com/role/BusinessSegmentsGeographicDataDetails Business Segments (Geographic Data) (Details) Details http://www.nasdaq.com/role/BusinessSegmentsTables 90 false false R91.htm 9955574 - Disclosure - Restructuring Charges (Narrative) (Details) Sheet http://www.nasdaq.com/role/RestructuringChargesNarrativeDetails Restructuring Charges (Narrative) (Details) Details http://www.nasdaq.com/role/RestructuringChargesTables 91 false false R92.htm 9955575 - Disclosure - Restructuring Charges (Summary of Restructuring Plan) (Details) Sheet http://www.nasdaq.com/role/RestructuringChargesSummaryofRestructuringPlanDetails Restructuring Charges (Summary of Restructuring Plan) (Details) Details http://www.nasdaq.com/role/RestructuringChargesTables 92 false false All Reports Book All Reports ndaq-20260331.htm ndaq-20260331.xsd ndaq-20260331_cal.xml ndaq-20260331_def.xml ndaq-20260331_lab.xml ndaq-20260331_pre.xml ndaq-20260331_g1.gif ndaq-20260331_g2.gif ndaq-20260331_g3.gif ndaq-20260331_g4.gif http://fasb.org/us-gaap/2025 http://xbrl.sec.gov/dei/2025 http://xbrl.sec.gov/ecd/2025 true true