Reconciliation of cash, cash equivalents and restricted cash as shown on the statements of financial condition: Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] DW SEF Dw Sef Llc [Member] DW SEF LLC (DW SEF) is a swap execution facility regulated by the Commodities Future Trading Commission. Fed Funds Effective Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Fair value adjustments or credit losses Debt Securities, Available-for-Sale, Allowance for Credit Loss, Not Previously Recorded TWL Tradeweb Llc [Member] Tradeweb LLC (TWL) is a registered broker-dealer under the Securities Exchange Act of 1934, a member of the Financial Industry Regulatory Authority, a registered independent introducing broker with the Commodities Future Trading Commission and a member of the National Futures Association. Statistical Measurement [Domain] Statistical Measurement [Domain] Related Party Transactions Related Party Transactions Disclosure [Text Block] Stock repurchase program, remaining authorized repurchase amount Share Repurchase Program, Remaining Authorized, Amount Income Tax Disclosure [Table] Income Tax Disclosure [Table] Disclosure of information pertaining to income taxes. 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Trading Symbol Trading Symbol Business Segment and Geographic Information Segment Reporting Information [Line Items] Unsettled share repurchases included in other liabilities Unsettled Share Repurchases Included In Other Liabilities Unsettled Share Repurchases Included In Other Liabilities Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest All Trading Arrangements All Trading Arrangements [Member] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] TW SEF Tw Sef Llc [Member] TW SEF LLC (TW SEF) is a swap execution facility regulated by the Commodities Future Trading Commission. 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Activities related to exchanges of LLC Interests (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Distributions to non-controlling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Pay vs Performance Disclosure [Line Items] Crypto Asset [Axis] Crypto Asset [Axis] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Percentage of amount of U.S. federal, state and local income or franchise tax savings Tax Receivable Agreement, Percentage Of Amount Of Federal, State And Local Income Or Franchise Tax Savings The percentage of amount of U.S. federal, state and local income or franchise tax savings under the tax receivable agreement. Accounts receivable Increase (Decrease) in Accounts Receivable Derivative [Table] Derivative [Table] Tax receivable agreement liability adjustment Tax receivable agreement liability adjustment Tax Receivable Agreement Liability, Adjustment Tax Receivable Agreement Liability, Adjustment Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Proceeds from stock-based compensation exercises Proceeds from Stock Options Exercised Award Timing Disclosures [Line Items] Other Performance Measure, Amount Other Performance Measure, Amount Common stock, shares outstanding (in shares) Common stock beginning balance (in shares) Common stock ending balance (in shares) Common Stock, Shares, Outstanding Securities sold under agreements to repurchase Increase (Decrease) in Financial Instruments Sold, Not yet Purchased General and administrative Other General and Administrative Expense, Net Of Reclassification Other General and Administrative Expense, Net Of Reclassification Increase/(decrease) in Tradeweb Markets Inc.’s additional paid-in capital as a result of ownership changes in TWM LLC Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests TWEU Tradeweb Eu Bv [Member] Tradeweb EU B.V. (TWEU) is a trading venue and approved publication arrangement regulated by the Netherlands Authority for the Financial Markets. 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Comprehensive Income (Loss), Net of Tax, Attributable to Parent Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Tax Receivable Agreement Tax Receivable Agreement Liability Disclosure [Text Block] The entire disclosure of tax receivable agreement liability. 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TESL Tradeweb Execution Services Limited [Member] Tradeweb Execution Services Limited Broker-Dealer [Abstract] Conversion ratio Noncontrolling Interest, Conversion Ratio The conversion ratio of shares of non-controlling interests. 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Tax Receivable Agreement Tax Receivable Agreement No definition available. Liabilities Derivative Liability Securities Sold Under Agreements to Repurchase Repurchase and Resale Agreements Policy [Policy Text Block] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Subsequent Event [Line Items] Subsequent Event [Line Items] Schedule of Regulatory Capital Requirements Schedule Of Regulatory Capital Requirements [Table Text Block] Tabular disclosure of the regulatory capital requirements and regulatory capital for entities subject to regulation. Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Other assets Other assets Other Assets Common stock, shares authorized (in shares) Common Stock, Shares Authorized Cash paid for acquisitions, net of cash acquired Cash paid for acquisition, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Diluted (in shares) Weighted average shares of Class A and Class B common stock outstanding - Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Axis] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Total stockholders’ equity attributable to Tradeweb Markets Inc. Equity, Attributable to Parent Justin Peterson Trading Arrangement, Vesting Of Previously Awarded Performance Based Restricted Stock Units [Member] Justin Peterson Trading Arrangement, Vesting Of Previously Awarded Performance Based Restricted Stock Units Other assets – Memberships in clearing organizations Receivables from Clearing Organizations Foreign Currency Call Option Foreign Exchange Option Foreign Exchange Option [Member] Hedging Designation [Domain] Hedging Designation [Domain] Number of LLC Interests held by non-controlling interests (in shares) Minority Interest Number Of Interests Held By Noncontrolling Owners The equity interest of noncontrolling shareholders. 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Subsidiary, Ownership Percentage, Parent Business Segment and Geographic Information Revenues from External Customers and Long-Lived Assets [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Number of shares authorized (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Schedule of Fair Value Measurement Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Transaction costs Business Combination, Acquisition Related Costs All Executive Categories All Executive Categories [Member] Dilutive securities (in shares) Dilutive effect (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Adjustments to non-controlling interests Minority Interest, Increase (Decrease) From Adjustments Amount of increase (decrease) in noncontrolling interest from adjustments. TDIFC Tradeweb Limited [Member] TDIFC Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Goodwill recognized expected to be tax deductible Business Acquisition, Goodwill, Expected Tax Deductible Amount Assets Assets [Abstract] Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax Document Type Document Type Commitment fee, percentage Line of Credit Facility, Commitment Fee Percentage Derivative Contract [Domain] Derivative Contract [Domain] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Software Development Costs Internal Use Software, Policy [Policy Text Block] Schedule of Information Regarding Revenue by Client Sector Schedule of Segment Reporting Information, by Segment [Table Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Average price per share (in dollars per share) Shares Acquired, Average Cost Per Share Transaction fees and commissions Transaction fees and commissions Transaction Fee Revenue [Member] Transaction fee revenues, both variable and fixed, recorded at a point in time when the trade occurs. William Hult Trading Arrangement, Shares Issued Upon Vesting In Settlement Of Dividend Equivalent Rights [Member] Rule Trading Arrangement, Shares Issued Upon Vesting In Settlement Of Dividend Equivalent Rights Excess Regulatory Capital Excess Regulatory Capital Amount by which the entity's regulatory capital (as defined) exceeds the requirement. Principal amount Debt Securities, Available-for-Sale, Amortized Cost Subscription fees Subscription Fee And Market Data Revenue [Member] Subscription fee revenue from granting access to institutional investors to the entity's electronic marketplaces and fees from the sale of market data to Refinitiv. Sara Furber Trading Arrangement, Vesting Of Previously Awarded Performance Based Restricted Stock Units [Member] Sara Furber Trading Arrangement, Vesting Of Previously Awarded Performance Based Restricted Stock Units Schedule of Recognized Revenue and Remaining Deferred Revenue Balance Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Restricted Cash Restricted Assets Disclosure [Text Block] Risk-Free Interest Rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Subsequent Event [Table] Subsequent Event [Table] Maximum Maximum [Member] Restricted Cash Equivalents [Abstract] Restricted Cash Equivalents [Abstract] Amortization expense Amortization of Intangible Assets Investments in Available-for-Sale Debt Securities Debt Securities, Available-for-Sale, Premium on Purchased Options [Policy Text Block] Deferred revenue Deferred revenue balance - beginning of period Deferred revenue balance - ending of period Deferred revenue Contract with Customer, Liability Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Adjusted For Refinitiv Transaction Adjusted For Refinitiv Transaction [Member] Reflects a new basis of accounting resulting from the Refinitiv transaction. Performance period Share-Based Compensation Arrangement by Share-Based Payment Award, Performance Period Share-Based Compensation Arrangement by Share-Based Payment Award, Performance Period International Non-US [Member] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Accounting Policies [Abstract] Accounting Policies [Abstract] Liabilities Liabilities [Abstract] Revenues Revenue: Revenues [Abstract] Fair Value Measurement Fair Value Measurement, Policy [Policy Text Block] Acquisitions Business Combination Disclosure [Text Block] Current Fiscal Year End Date Current Fiscal Year End Date Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Remaining percentage of tax benefits Tax Receivable Agreement Remaining Percentage of Amount of Federal State and Local Income or Franchise Tax Savings The remaining percentage of amount of U.S. federal, state and local income or franchise tax savings under the tax receivable agreement. Statistical Measurement [Axis] Statistical Measurement [Axis] PEO Name PEO Name Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income before taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Award Type [Domain] Award Type [Domain] Name Outstanding Recovery, Individual Name Cash and cash equivalents Less: Cash acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Impairment of goodwill Goodwill, Impairment Loss Schedule of Antidilutive Shares Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Total purchase consideration - cash paid and stock issued Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Deferred tax asset Deferred Income Tax Assets, Net Non-PEO NEO Non-PEO NEO [Member] Useful life of intangible assets Finite-Lived Intangible Asset, Useful Life Title of Individual [Axis] Title and Position [Axis] Credit adjustment spread Debt Instrument, Credit Adjustment Spread Debt Instrument, Credit Adjustment Spread Additional Paid-In Capital Additional Paid-in Capital [Member] Award Timing Predetermined Award Timing Predetermined [Flag] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Change in Contract with Customer Change In Contract with Customer, Liability [Roll Forward] Change In Contract with Customer, Liability Deferred tax liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Customer Relationships Intangible assets - Customer relationships Customer Relationships [Member] Recent Accounting Pronouncements and Recent SEC Final Rules New Accounting Pronouncements, Policy [Policy Text Block] Diluted (in dollars per share) Earnings per share - Diluted (in dollars per share) Earnings Per Share, Diluted General and administrative Other General and Administrative Expense Class of Stock [Axis] Class of Stock [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Title of Individual [Domain] Title and Position [Domain] ICDLC Institutional Cash Distributors [Member] Institutional Cash Distributors Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Name Measure Name Entity Interactive Data Current Entity Interactive Data Current Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Regulatory Capital Requirements Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Ownership [Axis] Ownership [Axis] Vesting percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Realized and unrealized (losses) gains Gain (Loss), Foreign Currency Transaction, before Tax Furniture, Equipment, Purchased Software and Leasehold Improvements Furniture Equipment And Purchased Software [Member] Furniture, equipment and purchased software. Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Customer [Axis] Customer [Axis] Less: Distributed and undistributed earnings allocated to unvested RSUs and unsettled vested PRSUs Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Total LLC Interests outstanding Minority Interest Total Ownership Percentage The total ownership interest on noncontrolling interest expressed as a percentage. Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Other Stockholders Other Stockholders [Member] Other Stockholders Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Equity Members' Equity [Abstract] Realized and unrealized gain (loss) on derivative contracts Realized and unrealized gains (losses) on derivative contracts Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Provision for income taxes Income Tax Expense (Benefit) Interest rate Debt Instrument, Interest Rate, Stated Percentage Gross notional amount Derivative, Notional Amount Derivative asset Derivative Asset Supplemental disclosure of cash flow information Supplemental Cash Flow Information [Abstract] Net income attributable to outstanding shares of Class A and Class B common stock - Diluted Net Income (Loss) Available to Common Stockholders, Diluted Increase (decrease) in operating liabilities: Increase (Decrease) in Operating Liabilities [Abstract] Total revenue Total revenue Revenues Revenue from Contract with Customer, Excluding Assessed Tax Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Effective tax rate Effective Income Tax Rate Reconciliation, Percent Tradeweb Markets LLC Tradeweb Markets LLC [Member] Tradeweb Markets LLC. Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Operating income Operating income Operating Income (Loss) Accounts receivable, net of allowance for credit losses of $206 and $284 at September 30, 2024 and December 31, 2023, respectively Accounts receivable Account Receivable Excluding Receivable From Brokers And Dealers And Clearing Organizations, Net Of Allowance Account receivable excluding receivable from brokers and dealers and clearing organizations, net of allowance. Variable Rate [Domain] Variable Rate [Domain] Business Acquisition [Line Items] Business Acquisition [Line Items] Total liabilities and equity Liabilities and Equity Subsequent Events Subsequent Events [Text Block] Dividends Dividends Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] All Adjustments to Compensation All Adjustments to Compensation [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Additional paid-in capital Additional Paid in Capital Steven Berns Trading Arrangement, Class A Common Stock [Member] Steven Berns Trading Arrangement, Class A Common Stock Hedging Designation [Axis] Hedging Designation [Axis] ICD Acquisition ICD [Member] ICD Noncontrolling Interest [Table] Noncontrolling Interest [Table] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Legal Entity [Axis] Legal Entity [Axis] Issuance, allocated to consideration transferred for the business combination Stock Issued During Period, Value, Pre-Acquisition Stock Issued During Period, Value, Pre-Acquisition Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Axis] Liquid Financial Assets Liquid Financial Assets Liquid financial assets calculated under the Commodity Exchange Act. PSUs Phantom Share Units (PSUs) [Member] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Measurement Input Type [Axis] Measurement Input Type [Axis] Individual: Individual [Axis] Significant unobservable input Debt Securities, Available-for-Sale, Measurement Input Payroll taxes paid for stock-based compensation Share-based payment arrangement, decrease for tax withholding obligation Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Restricted cash Restricted cash Restricted cash Restricted Cash Maturity (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Product and Service [Axis] Product and Service [Axis] Entity Address, State or Province Entity Address, State or Province Furniture, Equipment, Purchased Software and Leasehold Improvements Property, Plant and Equipment [Line Items] Statement [Line Items] Statement [Line Items] Measurement Input Type [Domain] Measurement Input Type [Domain] Deposits with clearing organizations Increase (Decrease) in Deposit Assets Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Schedule of Balances From Transactions with Affiliates Included in the Consolidated Statements Schedule of Related Party Transactions [Table Text Block] Schedule of Outstanding Shares Of Common Stock Schedule of Stockholders Equity [Table Text Block] Corporates Corporate Client Sector [Member] Corporate Client Sector Expenses Operating Expenses [Abstract] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Deferred Offering Costs Deferred Charges, Policy [Policy Text Block] Purchase consideration, net of cash acquired Business Combination, Consideration Transferred Liabilities and Equity Liabilities and Equity [Abstract] Justin Peterson Trading Arrangement, Vesting Of Previously Awarded Restricted Stock Units [Member] Justin Peterson Trading Arrangement, Vesting Of Previously Awarded Restricted Stock Units Software development costs Software Development [Member] Allowance for Credit Losses Credit Loss, Financial Instrument [Policy Text Block] Shares contributed by refinitiv owner (in shares) Stock Contributed During Period Acquiree Majority Owner Stock Contributed During Period Acquiree Majority Owner Cash paid for foreign currency call option, net of sale proceeds Payments for Derivative Instrument, Investing Activities Risks and Uncertainties [Abstract] Risks and Uncertainties [Abstract] TWD Tradeweb Direct Llc [Member] Tradeweb Direct LLC (TWD) is a registered broker-dealer under the Securities Exchange Act of 1934, and a member of the Financial Industry Regulatory Authority. Technology and communications Technology and communications Communications and Information Technology Required Liquid Financial Assets Required Liquid Financial Assets Amount of liquid financial assets required to be maintained under the Commodity Exchange Act. Minimum Minimum [Member] Restatement Determination Date Restatement Determination Date Other Other Other fees Financial Service, Other [Member] Adoption Date Trading Arrangement Adoption Date Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Yieldbroker Acquisition Yieldbroker Acquisition [Member] Yieldbroker Acquisition Related Party Transactions [Abstract] Related Party Transactions [Abstract] Receivable and due from affiliates Receivable and due from affiliates Other Receivables One Month SOFR One Month Secured Overnight Financing Rate [Member] One Month Secured Overnight Financing Rate Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Withholding taxes payable relating to stock-based compensation settlements included in accrued compensation Noncash Financing Activities, Taxes Payable Relating to Stock-based Compensation Settlements Noncash Financing Activities, Taxes Payable Relating to Stock-based Compensation Settlements Justin Peterson [Member] Justin Peterson Lease right-of-use assets Operating Lease, Right-of-Use Asset Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Other Income (Loss) Other Operating Income (Expense) [Member] Foreign currency translation adjustment, tax benefit Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Credit loss expense (reversal) Accounts Receivable, Credit Loss Expense (Reversal) Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Revenue Business Acquisition, Pro Forma Revenue Tradeweb Markets Inc Tradeweb Markets Inc [Member] Tradeweb Markets Inc., the reporting entity. Derivative Instrument [Axis] Derivative Instrument [Axis] Letter of credit issued Long-Term Debt, Gross Exercise Price Award Exercise Price Deposits with clearing organizations Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits with Clearing Organizations Earnings Per Share Earnings Per Share [Text Block] Accrued compensation Increase (Decrease) in Employee Related Liabilities Arrangement Duration Trading Arrangement Duration Justin Peterson Trading Arrangement, Shares Issued Upon Vesting In Settlement Of Dividend Equivalent Rights [Member] Justin Peterson Trading Arrangement, Shares Issued Upon Vesting In Settlement Of Dividend Equivalent Rights Subsequent Event Subsequent Event [Member] Issuance, amortized into stock-based compensation expense Stock Issued During Period, Value, Post-Acquisition Stock Issued During Period, Value, Post-Acquisition Weighted-average grant-date fair value (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Accrued compensation Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Employees Related Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Employees Related Liabilities Income Tax Income Tax, Policy [Policy Text Block] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Tax receivable agreement liability and deferred taxes arising from LLC Interest ownership exchanges and the issuance of common stock from equity incentive plans Adjustments to Additional Paid in Capital Tax Receivable Agreement Liability and Deferred Taxes Reorganization Transaction and IPO Amount of decrease to additional paid in capital (APIC) resulting from tax receivable agreement liability and deferred taxes arising from the reorganization transactions and IPO. Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Change from net income attributable to Tradeweb Markets Inc. and transfers (to) from non-controlling interests Net Income Attributable To Parent And Transfers (To) From Noncontrolling Interest The amount of net income (loss) attributable to parent and transfers (to) from noncontrolling interests. Revolving credit facility, term Debt Instrument, Term All Individuals All Individuals [Member] TEL Tradeweb Europe Limited [Member] Tradeweb Europe Limited (TEL) is a Multilateral Trading Facility regulated by the Financial Conduct Authority in the UK, which maintains branches in Asia which are regulated by certain Asian securities regulators. PEO PEO [Member] Variable Rate [Axis] Variable Rate [Axis] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Entities [Table] Entities [Table] Name Trading Arrangement, Individual Name Other income (loss), net Other Nonoperating Income (Expense) Statement of Stockholders' Equity [Abstract] Intangible assets, net of accumulated amortization Intangible Assets, Net (Excluding Goodwill) Receivable from and Payable to Broker and Dealers and Clearing Organizations Industry-Specific Policies, Broker-Dealer [Policy Text Block] Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Proceeds from unwinding of out-of-the-money derivative Proceeds from Derivative Instrument, Investing Activities Cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract] Refinitiv Refinitiv [Member] Refinitiv, formerly the Thomson Reuters Financial & Risk Business. Schedule of Financial Resources and Liquid Financial Resources Futures Commission Merchant, Minimum Financial Requirement [Table Text Block] Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Dividends payable Dividends Payable Subscription fees Subscription fees Subscription Fee Revenue [Member] Subscription fee revenue from granting access to institutional investors to the entity's electronic marketplaces. Assets Assets, Fair Value Disclosure [Abstract] Issuance of common stock for business acquisitions Stock Issued Dividends Payments of Ordinary Dividends Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Related Party [Domain] Related and Nonrelated Parties [Domain] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Local Phone Number Local Phone Number Revenues Disaggregation of Revenue [Abstract] Additional adjustment Debt Instrument, Adjustment In Addition To Credit Adjustment Spread Debt Instrument, Adjustment In Addition To Credit Adjustment Spread Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Deferred tax liability Deferred Income Tax Liabilities, Net Annualized Volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Convertible Notes Payable Convertible Notes Payable [Member] Share repurchases pursuant to the share repurchase program (in shares) Stock Repurchased During Period, Shares Award requisite service period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period Other assets Increase (Decrease) in Other Operating Assets Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] PEO Total Compensation Amount PEO Total Compensation Amount Intangible assets - Tradename Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Occupancy Occupancy Occupancy, Net Receivable from brokers and dealers and clearing organizations Receivable from brokers and dealers and clearing organizations Receivable from Broker-Dealer and Clearing Organization Variable Variable Pricing [Member] Contract with customer in which amount of consideration is based on variable components such as transaction based fees. Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Income Statement Location [Axis] Statement of Income Location, Balance [Axis] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Offering costs incurred Payments of Stock Issuance Costs Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Justin Peterson Trading Arrangement, Shares Issued Upon Vesting In Settlement Of Dividend Equivalent Rights Subject To Restricted Stock Awards Accrued During Vesting Period [Member] Justin Peterson Trading Arrangement, Shares Issued Upon Vesting In Settlement Of Dividend Equivalent Rights Subject To Restricted Stock Awards Accrued During Vesting Period Scott Zucker Trading Arrangement, Vesting Of Previously Awarded Restricted Stock Units [Member] Scott Zucker Trading Arrangement, Vesting Of Previously Awarded Restricted Stock Units Common Stock Common Stock [Member] Measure: Measure [Axis] Minimum performance modifier, percent Share-based Compensation Arrangement by Share-based Payment Award, Minimum Performance Modifier Share-based Compensation Arrangement by Share-based Payment Award, Minimum Performance Modifier Stock split ratio, common stock Stockholders' Equity Note, Stock Split, Conversion Ratio Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Issuance of common stock from equity incentive plans (in shares) Stock Issued During Period, Shares, New Issues Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Entity Emerging Growth Company Entity Emerging Growth Company Share-based payment arrangement, accelerated cost Share-Based Payment Arrangement, Accelerated Cost Total Liabilities, Fair Value Disclosure Segment Reporting [Abstract] Segment Reporting [Abstract] Number of shares withheld (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Intangible Assets Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Entity Central Index Key Entity Central Index Key Financial Resources Futures Commission Merchant, Commodity Exchange Act, Adjusted Net Capital General and Administrative Expense General and Administrative Expense [Member] 2019 Omnibus Equity Incentive Plan Omnibus2019 Equity Incentive Plan [Member] Represents the information pertaining to omnibus 2019 equity incentive plan. Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount William Hult Trading Arrangement, Class A Common Stock [Member] William Hult Trading Arrangement, Class A Common Stock Accounts payable, accrued expenses and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Equity Component [Domain] Equity Component [Domain] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Bridge Loan Bridge Loan [Member] Business Segment and Geographic Information Segment Reporting Disclosure [Text Block] Securities sold under agreements to repurchase Securities Sold under Agreements to Repurchase Total Fair Value Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Payable to brokers and dealers and clearing organizations Payable to brokers and dealers and clearing organizations Broker-Dealer, Payable to Other Broker-Dealer and Clearing Organization Distributions to non-controlling interests Payments Of Capital Distribution To Noncontrolling Interest Amount of cash outflow in the form of capital distribution to noncontrolling interests. Adjustments to reconcile net income to net cash provided by (used in) operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition RSUs and RSAs Restricted Stock [Member] Professional fees Professional fees Professional Fees Entity Shell Company Entity Shell Company Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Class B Common Stock Common Class B [Member] Title Trading Arrangement, Individual Title DW Dealerweb [Member] Dealerweb Inc. (DW) is a registered broker-dealer under the Securities Exchange Act of 1934, a member of the Financial Industry Regulatory Authority, a registered independent introducing broker with the Commodities Future Trading Commission and a member of the National Futures Association. William Hult Trading Arrangement, Vesting Of Previously Awarded Performance Based Restricted Stock Units [Member] William Hult Trading Arrangement, Vesting Of Previously Awarded Performance Based Restricted Stock Units Consolidated Entities [Axis] Consolidated Entities [Axis] Statement [Table] Statement [Table] Effect of foreign currency exchange rate changes Contract With Customer, Liability, Foreign Currency Exchange Rate Contract With Customer, Liability, Foreign Currency Exchange Rate NFI Acquisition NFI Acquisition [Member] NFI Acquisition Accounts payable, accrued expenses and other liabilities Accounts payable, accrued expenses and other liabilities Accounts Payable and Accrued Liabilities Measurement Frequency [Domain] Measurement Frequency [Domain] Significant Accounting Policies Significant Accounting Policies [Text Block] Net Income Per Share Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Scott Zucker [Member] Scott Zucker City Area Code City Area Code (Increase) decrease in operating assets: Increase (Decrease) in Operating Assets [Abstract] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Quoted Prices in active Markets for Identical Assets (Level 1) Quoted Prices in active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Foreign currency translation adjustments, with no tax benefit for each of the three and nine months ended September 30, 2024 and 2023 Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Steven Berns Trading Arrangement, Vesting Of Previously Awarded Restricted Stock Units [Member] Steven Berns Trading Arrangement, Vesting Of Previously Awarded Restricted Stock Units Broker-dealer, self-funded remaining difference between the fail to deliver and fail to receive Broker-Dealer, Self-Funded Remaining Difference Between Fail To Deliver And Fail To Receive Broker-Dealer, Self-Funded Remaining Difference Between Fail To Deliver And Fail To Receive Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] New billings Contract With Customer Liability, New Billings Amount of deferred revenue recognized for new billing arising during the current reporting period. Non-cash investing and financing activities Noncash Investing and Financing Items [Abstract] Share repurchases pursuant to share repurchase programs Payments for Repurchase of Common Stock Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Equity investment without readily determinable fair values Equity Securities without Readily Determinable Fair Value, Amount Future minimum lease payments for lease not yet commenced Unrecorded Unconditional Purchase Obligation Subsequent Event Type [Axis] Subsequent Event Type [Axis] Income Taxes Income Tax Disclosure [Text Block] 2028 Lessee, Operating Lease, Liability, to be Paid, Year Four Accordion feature Line of Credit Facility, Accordion Feature, Increase Limit Line of Credit Facility, Accordion Feature, Increase Limit Earnings per share attributable to Tradeweb Markets Inc. Class A and B common stockholders: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Numerator: Net Income (Loss) Attributable to Parent [Abstract] Awarded during 2022 and prior Awarded During 2022 And Prior [Member] Awarded During 2022 And Prior Excess Liquid Financial Assets Excess Liquid Financial Assets The amount by which actual liquid financial assets exceeds (does not exceed) required liquid financial assets under the Commodity Exchange Act Retained earnings Retained Earnings (Accumulated Deficit) Class of Stock [Domain] Class of Stock [Domain] Target performance modifier, percent Share-based Compensation Arrangement by Share-based Payment Award, Target Performance Modifier Share-based Compensation Arrangement by Share-based Payment Award, Target Performance Modifier Related Party Transactions Related Party Transaction [Line Items] Total LLC Interests outstanding (in shares) Minority Interest Total Number Of Interests The total number of shares of the subsidiary. Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Equity Awards Adjustments Equity Awards Adjustments [Member] Lease liabilities Lease liability Operating Lease, Liability Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Class D Common Stock Common Class D [Member] Classification of common stock that has different rights than provided to other classes of common stock, representing interest in a corporation. Underlying Securities Award Underlying Securities Amount Receivable from/payable to brokers and dealers and clearing organizations, net Increase (Decrease) in Receivable from Broker-Dealer and Clearing Organization Credit Facility [Axis] Credit Facility [Axis] Business acquisition depreciation and amortization Business Acquisition, Pro Forma Depreciation And Amortization Business Acquisition, Pro Forma Depreciation And Amortization TWJ Tradeweb Japan Kk [Member] Tradeweb Japan K.K. (TWJ) is a security house regulated by the Japanese Financial Services Agency and the Japan Securities Dealers Association. Amendment Flag Amendment Flag Entity Registrant Name Entity Registrant Name All-cash acquisition Payments to Acquire Businesses, Gross Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Fair Value as of Grant Date Award Grant Date Fair Value Subsequent Events [Abstract] Subsequent Events [Abstract] Affiliated Entity Affiliated Entity [Member] Significant Observable Inputs (Level 2) Significant Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Geographical [Domain] Geographical [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Schedule of Breakdown of Revenues Between Fixed and Variable Revenues Disaggregation of Revenue [Table Text Block] Issuance of common stock from equity incentive plans Stock Issued During Period, Value, New Issues Entity Address, Postal Zip Code Entity Address, Postal Zip Code Schedule of Total Stock-based Compensation Expense Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Pushdown Accounting Consolidation, Policy [Policy Text Block] LSEG market data fees Market Data Revenue [Member] Market data revenue earned from the sale of market data to Refinitiv, which redistributes the data. Includes real-time market data fees and historical data sets. Voting power percentage Voting power percentage Voting power percentage. Restatement Determination Date: Restatement Determination Date [Axis] PRSUs Equity Settled Performance Based Restricted Stock Units [Member] Equity Settled Performance Based Restricted Stock Units [Member] Title of 12(b) Security Title of 12(b) Security Common stock, value Common Stock, Value, Issued Tax receivable agreement liability Tax receivable agreement liability Tax Receivable Agreement Liability The carrying amount as on the balance sheet date of tax receivable agreement liability. Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Issuance of common stock for business acquisitions Stock Issued During Period, Value, Acquisitions Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Regulatory Capital Regulatory Capital Regulatory capital as calculated for each entity under applicable regulations. Sara Furber Trading Arrangement, Shares Issued Upon Vesting In Settlement Of Dividend Equivalent Rights Subject To Restricted Stock Awards Accrued During Vesting Period [Member] Sara Furber Trading Arrangement, Shares Issued Upon Vesting In Settlement Of Dividend Equivalent Rights Subject To Restricted Stock Awards Accrued During Vesting Period Canton Coins Canton Coins [Member] Canton Coins Issuance of common stock for business acquisitions (in shares) Stock Issued During Period, Shares, Acquisitions Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Intangible Assets Finite-Lived Intangible Assets [Line Items] Effect of exchange rate changes on cash, cash equivalents and restricted cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Equity Investments Without Readily Determinable Fair Values Equity Securities without Readily Determinable Fair Value [Policy Text Block] Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Preferred stock, $0.00001 par value; 250,000,000 shares authorized; none issued or outstanding Preferred Stock, Value, Issued Useful life Property, Plant and Equipment, Useful Life Revenue recognized Contract With Customer, Liability, Revenue Recognized Including New Billings Contract With Customer, Liability, Revenue Recognized Including New Billings Non-Controlling Interests Noncontrolling Interest Disclosure [Text Block] Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Basic (in dollars per share) Earnings per share - Basic (in dollars per share) Earnings Per Share, Basic Cash acquired from acquisition Cash Acquired from Acquisition Receivable and due from affiliates/payable and due to affiliates, net Increase (Decrease) Due from Affiliates Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Regulatory Capital Requirements Regulatory Capital Requirements [Text Block] The entire disclosure of capital requirements and required financial resources under applicable regulations. Total 2024 Business Combinations Twenty Twenty Four Business Acquisitions [Member] Twenty Twenty Four Business Acquisitions Ownership [Domain] Ownership [Domain] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table] Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table] Furniture, equipment, software and leasehold improvement additions included in accounts payable Capital Expenditures Incurred but Not yet Paid Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Amortization expense Amortization Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Four Lessee, Operating Lease, Liability, to be Paid, after Year Four Net income attributable to outstanding shares of Class A and Class B common stock - Basic Net Income (Loss) Available to Common Stockholders, Basic Furniture, Equipment, Purchased Software and Leasehold Improvements Property, Plant and Equipment, Policy [Policy Text Block] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Number of claims dismissed Loss Contingency, Claims Dismissed, Number Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Total assets Assets Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Increase/(decrease) in Tradeweb Markets Inc.’s additional paid-in capital as a result of ownership changes in TWM LLC Noncontrolling Interest, Increase from Subsidiary Equity Issuance Purchases of furniture, equipment, software and leasehold improvements Payments to Acquire Property, Plant, and Equipment Sara Fuber Trading Arrangement, Shares Issued Upon Vesting In Settlement Of Dividend Equivalent Rights Subject To Restricted Stock Awards Accrued During Vesting Period [Member] Sara Fuber Trading Arrangement, Shares Issued Upon Vesting In Settlement Of Dividend Equivalent Rights Subject To Restricted Stock Awards Accrued During Vesting Period Deferred revenue Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Commitments and contingencies (Note 13) Commitments and Contingencies Stock-Based Compensation Share-Based Payment Arrangement [Policy Text Block] Business Combinations Business Combinations Policy [Policy Text Block] Termination Date Trading Arrangement Termination Date Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Fair Value of Financial Instruments Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] 2026 Lessee, Operating Lease, Liability, to be Paid, Year Two Stockholders' Equity and Stock-Based Compensation Plans Share-Based Payment Arrangement [Text Block] Regulatory Capital Requirement Regulatory Capital Requirement Amount of regulatory capital required to be maintained for each entity under applicable regulations. Payable and due to affiliates Payable and due to affiliates Other Liabilities Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Entity Address, City or Town Entity Address, City or Town Schedule of Final Purchase Price Allocated Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Leases Lessee, Leases [Policy Text Block] Sara Fuber Trading Arrangement, Vesting Of Previously Awarded Restricted Stock Units [Member] Sara Fuber Trading Arrangement, Vesting Of Previously Awarded Restricted Stock Units Noncontrolling Interest [Abstract] Noncontrolling Interest [Abstract] Total stock-based compensation expense Share-Based Payment Arrangement, Expense Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] Net income attributable to Tradeweb Markets Inc. Net income attributable to Tradeweb Markets Inc. Net income attributable to Tradeweb Markets Inc. Net Income (Loss) Attributable to Parent Net Income (Loss) Attributable to Parent Trading Arrangement: Trading Arrangement [Axis] Schedule of Financial Instruments Not Measured at Fair Value Fair Value, by Balance Sheet Grouping [Table Text Block] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] TWM LLC TWM LLC [Member] TWM LLC Loss Contingencies [Table] Loss Contingencies [Table] Business Acquisition [Axis] Business Acquisition [Axis] Credit Risk Allowance for Credit Losses [Text Block] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Weighted average unvested RSUs and unsettled vested PRSUs that were considered participating securities (in shares) Participating Securities, Distributed and Undistributed Earnings (Loss), Shares Participating Securities, Distributed and Undistributed Earnings (Loss), Shares Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] TESBV Tradeweb Execution Services B.V. [Member] Tradeweb Execution Services B.V. Entity File Number Entity File Number Liabilities Liabilities, Fair Value Disclosure [Abstract] Consolidated Entities [Domain] Consolidated Entities [Domain] Revenue Revenue from Contract with Customer [Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Steven Berns [Member] Steven Berns Non- Controlling Interests Noncontrolling Interest [Member] Income Statement [Abstract] Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One Aggregate value of share repurchase Treasury Stock, Value, Acquired, Cost Method Lease liabilities Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation Weighted average shares outstanding: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Initial term of lease Term lease Lessee, Operating Lease, Term of Contract Total assets measured at fair value Assets, Fair Value Disclosure Name Forgone Recovery, Individual Name Remainder of 2024 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Award Date [Domain] Award Date [Domain] Document Period End Date Document Period End Date Contract with Customer, Basis of Pricing [Domain] Contract with Customer, Basis of Pricing [Domain] Schedule of the Impact on Equity Due to Changes in the Company’s Ownership Interest in Noncontrolling Interest Schedule Of Impact On Equity Due To Changes In The Company’s Ownership Interest In Noncontrolling Interest [Table Text Block] Tabular disclosure of impact on equity due to changes in the Company’s ownership interest in noncontrolling interest. Other (income) loss, net Other Noncash Income (Expense) Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Total future lease payments Lessee, Operating Lease, Liability, to be Paid Deferred revenue Increase (Decrease) in Deferred Revenue Insider Trading Arrangements [Line Items] Market Data Market Data Client Sector [Member] The market data client sector. Scott Zucker Trading Arrangement, Shares Issued Upon Vesting In Performance Based Settlement Of Dividend Equivalent Rights [Member] Scott Zucker Trading Arrangement, Shares Issued Upon Vesting In Performance Based Settlement Of Dividend Equivalent Rights Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Deposits with clearing organizations Deposits with clearing organizations Deposits with Clearing Organizations and Others, Securities 2027 Lessee, Operating Lease, Liability, to be Paid, Year Three PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Accounts payable, accrued expenses and other liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Revenue recognized that was previously deferred Contract with Customer, Liability, Revenue Recognized Adjustment to Compensation: Adjustment to Compensation [Axis] Net transfers (to) from non-controlling interests Transfers From (To) Noncontrolling Interests Amount of net transfers from (to) non controlling interest. Less: Net income attributable to non-controlling interests Less: Net income attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Document Transition Report Document Transition Report Document Quarterly Report Document Quarterly Report Institutional Institutional Client Sector [Member] The institutional client sector. Operating loss Operating income Business Acquisition, Pro Forma Operating Income (Loss) Business Acquisition, Pro Forma Operating Income (Loss) Customer [Domain] Customer [Domain] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Current Reporting Status Entity Current Reporting Status Retained Earnings Retained Earnings [Member] Income Tax Disclosure [Line Items] Income Tax Disclosure [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Ownership percentage, continuing LLC owners Number of LLC Interests held by non-controlling interests Subsidiary, Ownership Percentage, Noncontrolling Owner Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Retail Retail Client Sector [Member] The retail client sector. Public Investors Public Investors [Member] This member stands for public investors, collectively. Related Party [Axis] Related and Nonrelated Parties [Axis] Basic (in shares) Weighted average shares of Class A and Class B common stock outstanding - Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Lease right-of-use assets Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Right-Of-Use Asset Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Right-Of-Use Asset Capitalized software development costs Payments for Software ICDEU ICD Europa [Member] ICD Europa Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Software development costs, net of accumulated amortization Capitalized Computer Software, Net Amortization of pushdown accounting allocation Amortization Period Pushdown Accounting Adjustment Amortization period for pushdown accounting adjustments. Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest RSUs and RSAs Restricted Stock Units (RSUs) [Member] Cash and restricted cash Restricted Cash and Cash Equivalents, Fair Value Disclosure Restricted Cash and Cash Equivalents, Fair Value Disclosure Equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Executive Category: Executive Category [Axis] Termination penalties Line Of Credit Facility, Termination Penalties Line Of Credit Facility, Termination Penalties Required Financial Resources Futures Commission Merchant, Commodity Exchange Act, Required Net Capital Cash paid for investments Payments to Acquire Investments Name Awards Close in Time to MNPI Disclosures, Individual Name Prepaid expense Prepaid Expense Estimated tax liability Accrued Income Taxes Deferred tax asset Other Noncash Income Tax Expense Entity Filer Category Entity Filer Category Tax receivable agreement, payment term Tax Receivable Agreement, Term Tax Receivable Agreement, Term Income Statement Location [Domain] Statement of Income Location, Balance [Domain] Commitments and Contingencies Loss Contingencies [Line Items] Letter of Credit Letter of Credit [Member] Company Selected Measure Name Company Selected Measure Name