Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] DW SEF Dw Sef Llc [Member] DW SEF LLC (DW SEF) is a swap execution facility regulated by the Commodities Future Trading Commission. Maximum Maximum [Member] Pre-Funded Warrants Pre-Funded Warrants [Member] Pre-Funded Warrants Unrealized gain on available-for-sale debt security, tax expense OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax 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] Title of 12(b) Security Title of 12(b) Security Net income attributable to outstanding shares of Class A and Class B common stock - Diluted Net Income (Loss) Available to Common Stockholders, Diluted Subsequent Event Subsequent Event [Member] Document Fiscal Year Focus Document Fiscal Year Focus Adjustment to Compensation, Amount Adjustment to Compensation Amount ICDLT Institutional Cash Distributors Limited [Member] Institutional Cash Distributors Limited Software development costs, net of accumulated amortization Intangible Asse, Finite-Lived, Software Development Costs, Net Intangible Asse, Finite-Lived, Software Development Costs, Net Customer [Axis] Customer [Axis] Segment Reporting [Abstract] Segment Reporting [Abstract] Wholesale Wholesale Client Sector [Member] The wholesale client sector. 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Digital assets received as revenue Digital Assets Received As Revenue Digital Assets Received As Revenue Amendment Flag Amendment Flag Consolidated Entities [Axis] Consolidated Entities [Axis] Accounts receivable, credit loss expense (reversal) Accounts Receivable, Credit Loss Expense (Reversal) Average price per share (in dollars per share) Shares Acquired, Average Cost Per Share Tax receivable agreement liability adjustment Tax Receivable Agreement Liability, Adjustment Tax Receivable Agreement Liability, Adjustment Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Loss Contingencies [Table] Loss Contingencies [Table] Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Equity Members' Equity [Abstract] Consolidated Entities [Domain] Consolidated Entities [Domain] Related Party Transactions Related Party Transactions Disclosure [Text Block] Business Combination, Pro Forma Information, Nonrecurring Adjustment [Axis] Business Combination, Pro Forma Information, Nonrecurring Adjustment [Axis] General and administrative Other General and Administrative Expense, Net Of Reclassification Other General and Administrative Expense, Net Of Reclassification Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province 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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Douglas Friedman Trading Arrangement, Class A Common Stock, Upon Vested On March 15, 2027 [Member] Douglas Friedman Trading Arrangement, Class A Common Stock, Upon Vested On March 15, 2027 Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Earnings per share attributable to Tradeweb Markets Inc. 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Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] TESL Tradeweb Execution Services Limited [Member] Tradeweb Execution Services Limited Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Conversion ratio Noncontrolling Interest, Conversion Ratio The conversion ratio of shares of non-controlling interests. Company Selected Measure Name Company Selected Measure Name Total realized and unrealized gains included in other comprehensive income (loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) YB Yieldbroker [Member] Yieldbroker Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Unfunded capital commitment Equity Securities, Unfunded Capital Commitment Equity Securities, Unfunded Capital Commitment Unrealized gain on available-for-sale debt security, net of tax expense of $3,004, $741, $3,268 and $799 for the three and six months ended June 30, 2026 and 2025, respectively OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Concentration Risk [Line Items] Concentration Risk [Line Items] Non-cash investing and financing activities Noncash Investing and Financing Items [Abstract] Ownership interest Number of LLC Interests held by Tradeweb Markets Inc. Subsidiary, Ownership Percentage, Parent Letter of credit issued Long-Term Debt, Gross Net Income Per Share Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Crypto Asset Holding [Table] Crypto Asset, Holding [Table] Schedule of the Ownership Interest in Noncontrolling Interest Schedule Of Ownership Interest In Noncontrolling Interest [Table Text Block] Tabular disclosure of ownership interest in noncontrolling interest. Commitment fee, percentage Line of Credit Facility, Commitment Fee Percentage Debt Securities Debt Securities [Member] Tax Receivable Agreement Tax Receivable Agreement No definition available. 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Transfer out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Underlying Security Market Price Change Underlying Security Market Price Change, Percent Dividends Dividends iAltaA Capital Markets, LLC iAltaA Capital Markets, LLC [Member] iAltaA Capital Markets, LLC Dividends payable Dividends Payable Entities [Table] Entities [Table] Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Vesting percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Number of units restricted Crypto Asset, Number of Units, Restricted Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Investments in Available-for-Sale Debt Securities Debt Securities, Available-for-Sale, Premium on Purchased Options [Policy Text Block] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Schedule of Changes in Fair Value for Level 3 Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] General and administrative General and administrative Other General and Administrative Expense Receivable and due from related parties Receivable and due from related parties Other Receivables Unsettled share repurchases and excise tax included in other liabilities Unsettled Share Repurchases And Excise Tax Included In Other Liabilities Unsettled Share Repurchases And Excise Tax Included In Other Liabilities Award Timing Predetermined Award Timing Predetermined [Flag] 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. Letters of credit outstanding Letters of Credit Outstanding, Amount Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition 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] TWSA Tradeweb Saudi Arabia [Member] Tradeweb Saudi Arabia Effective tax rate Effective Income Tax Rate Reconciliation, Percent Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Grantee Status [Domain] Grantee Status [Domain] Total future lease payments Lessee, Operating Lease, Liability, to be Paid Dilutive effect (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Intangible Assets Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] All Executive Categories All Executive Categories [Member] Share repurchases pursuant to share repurchase programs Share repurchases pursuant to share repurchase programs Stock Repurchased and Retired During Period, Value Adjustments to non-controlling interests Minority Interest, Increase (Decrease) From Adjustments Amount of increase (decrease) in noncontrolling interest from adjustments. Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] TDIFC Tradeweb Limited [Member] TDIFC Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Depreciation expense Depreciation Antidilutive Securities [Axis] Antidilutive Securities [Axis] Lease right-of-use assets Operating Lease, Right-of-Use Asset Deposits with clearing organizations Deposits with clearing organizations Deposits with Clearing Organizations and Others, Securities 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. Schedule of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Excess Regulatory Capital Excess Regulatory Capital Amount by which the entity's regulatory capital (as defined) exceeds the requirement. Non-Controlling Interests Noncontrolling Interest [Line Items] Cost Basis Crypto Asset, 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. Business Segment and Geographic Information Segment Reporting [Text Block] Minimum Minimum [Member] Expiration Date Trading Arrangement Expiration Date Schedule of Canton Coin Holdings Crypto Asset, Holding [Table Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Schedule of Breakdown of Revenues Between Fixed and Variable Revenues Disaggregation of Revenue [Table Text Block] Adjusted For Refinitiv Transaction Adjusted For Refinitiv Transaction [Member] Reflects a new basis of accounting resulting from the Refinitiv transaction. Liabilities Liabilities [Abstract] Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Performance period Share-Based Compensation Arrangement by Share-Based Payment Award, Performance Period Share-Based Compensation Arrangement by Share-Based Payment Award, Performance Period Weighted average shares outstanding: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Income Statement Location [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Cash equivalents – Money market funds and other highly liquid investments Cash and Cash Equivalents, Fair Value Disclosure Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Payable and due to related parties Payable and due to related parties Other Liabilities Affiliated Entity Affiliated Entity [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] 2026 Share Repurchase Program 2026 Share Repurchase Program [Member] 2026 Share Repurchase Program 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. Derivative [Table] Derivative [Table] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Useful life of intangible assets Intangible Asset, Finite-Lived, Useful Life Exercise Price Award Exercise Price Cash flows from investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Business Segment and Geographic Information Segment Reporting [Line Items] Share repurchase program, amount authorized Share Repurchase Program, Authorized, Amount Document Quarterly Report Document Quarterly Report 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] Segments [Domain] Segments [Domain] Credit adjustment spread Debt Instrument, Credit Adjustment Spread Debt Instrument, Credit Adjustment Spread Quantity (canton coins) Crypto Asset, Number of Units Furniture, Equipment, Purchased Software and Leasehold Improvements Property, Plant, and Equipment [Policy Text Block] Effect of exchange rate changes on cash, cash equivalents and restricted cash Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Change in Contract with Customer Change In Contract with Customer, Liability [Roll Forward] Change In Contract with Customer, Liability Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] ICDLC Institutional Cash Distributors [Member] Institutional Cash Distributors Equity method investments Equity Method Investments Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Unrealized (loss) gain related to changes of the fair value Total realized and unrealized gains included in other income (loss), net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Measurement Input Type [Domain] Measurement Input Type [Domain] Deposits with clearing organizations Increase (Decrease) in Deposit Assets Digital asset loan receivable Loans Receivable, Fair Value Disclosure Total expenses Costs and Expenses Adoption Date Trading Arrangement Adoption Date Interest rate Debt Instrument, Interest Rate, Stated Percentage Total stockholders’ equity attributable to Tradeweb Markets Inc. Equity, Attributable to Parent 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 Assets Assets [Abstract] Receivable from brokers and dealers and clearing organizations Receivable from brokers and dealers and clearing organizations Receivable from Broker-Dealer and Clearing Organization Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Total LLC Interests outstanding Minority Interest Total Ownership Percentage The total ownership interest on noncontrolling interest expressed as a percentage. Amortized cost basis Debt Securities, Available-for-Sale, Amortized Cost Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Required Financial Resources Futures Commission Merchant, Commodity Exchange Act, Required Net Capital Risk-Free Interest Rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Other Stockholders Other Stockholders [Member] Other Stockholders Lease liabilities Lease liability Operating Lease, Liability Fair Value, Nonrecurring Fair Value, Nonrecurring [Member] Professional fees Professional fees Professional Fees Insider Trading Policies and Procedures [Line Items] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Deferred taxes Deferred Income Tax Expense (Benefit) PSUs Phantom Share Units (PSUs) [Member] Business Combination [Domain] Business Combination [Domain] Letter of Credit Letter of Credit [Member] Business Segment and Geographic Information Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] 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 Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Number of operating segments Number of Operating Segments Antidilutive shares (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount RSUs Restricted Stock Units (RSUs) [Member] Schedule of Antidilutive Shares Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Entity Central Index Key Entity Central Index Key Accumulated depreciation and amortization Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Tradeweb Markets LLC Tradeweb Markets LLC [Member] Tradeweb Markets LLC. Accounts receivable, net of allowance for credit losses of $209 and $587 at June 30, 2026 and December 31, 2025, 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. Digital assets – Canton Coins Fair Value Crypto Asset, Fair Value All Adjustments to Compensation All Adjustments to Compensation [Member] Business Combination [Axis] Business Combination [Axis] 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] Income Tax Income Tax, Policy [Policy Text Block] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Income Statement [Abstract] Income Statement [Abstract] ICD Acquisition ICD [Member] ICD Document Transition Report Document Transition Report Ownership [Axis] Ownership [Axis] Excess Financial Resources Futures Commission Merchant, Commodity Exchange Act, Excess Net Capital Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Investment, Name [Axis] Investment, Name [Axis] Fair value, restricted Crypto Asset, Fair Value, Restricted Expenses Operating Expenses [Abstract] Deferred tax asset Deferred Income Tax Assets, Net Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Liquid Financial Assets Liquid Financial Assets Liquid financial assets calculated under the Commodity Exchange Act. 2022 Share Repurchase Program 2022 Share Repurchase Program [Member] 2022 Share Repurchase Program Expenses Interest Income, Securities, Operating, by Taxable Status [Abstract] Schedule of Revenue and Long-Lived Assets by Geographic Location Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table Text Block] Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Douglas Friedman Trading Arrangement, Performance-Based Restricted Stock Units, Vesting Period Of January 1, 2024 – January 1, 2027 [Member] Douglas Friedman Trading Arrangement, Performance-Based Restricted Stock Units, Vesting Period Of January 1, 2024 – January 1, 2027 City Area Code City Area Code Variable Rate [Domain] Variable Rate [Domain] RSAs Restricted Stock [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Subsequent Events Subsequent Events [Text Block] Name Forgone Recovery, Individual Name Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] Total assets Assets Corporates Corporate Client Sector [Member] Corporate Client Sector Entity [Domain] Entity [Domain] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Stock-Based Compensation Share-Based Payment Arrangement [Policy Text Block] Interest expense Interest Expense, Nonoperating Schedule of Total Stock-based Compensation Expense Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] 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. Equity investment without readily determinable fair values Equity Securities without Readily Determinable Fair Value, Amount Required Liquid Financial Assets Required Liquid Financial Assets Amount of liquid financial assets required to be maintained under the Commodity Exchange Act. Measurement Input, Perpetual Growth Rate Measurement Input, Perpetual Growth Rate [Member] Measurement Input, Perpetual Growth Rate Stockholders' Equity and Stock-Based Compensation Plans Share-Based Payment Arrangement [Text Block] Other assets Increase (Decrease) in Other Operating Assets Issuance of common stock from equity incentive plans (in shares) Stock Issued During Period, Shares, New Issues Occupancy Occupancy Occupancy, Net PEO PEO [Member] Yieldbroker Acquisition Yieldbroker Acquisition [Member] Yieldbroker Acquisition One Month SOFR One Month Secured Overnight Financing Rate [Member] One Month Secured Overnight Financing Rate Total stock-based compensation expense Share-Based Payment Arrangement, Expense Share repurchases pursuant to share repurchase programs (in shares) Stock repurchased and retired during period (in shares) Stock Repurchased and Retired During Period, Shares Goodwill Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Digital assets and other investments at fair value Investments 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 Tradeweb Markets Inc Tradeweb Markets Inc [Member] Tradeweb Markets Inc., the reporting entity. Class C Common Stock Common Class C [Member] Revenue recognized that was previously deferred Contract with Customer, Liability, Revenue Recognized Subsequent Event Type [Domain] Subsequent Event Type [Domain] Retained Earnings Retained Earnings [Member] Revolving credit facility Revolving Credit Facility [Member] Class of warrant or right, exercised (in shares) Class of Warrant or Right, Exercised Class of Warrant or Right, Exercised Internal software Software, In-Development, Internally Developed, and Purchased [Member] Fair Value Measurement Fair Value Measurement, Policy [Policy Text Block] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Common stock beginning balance (in shares) Common stock ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Revenues Disaggregation of Revenue [Abstract] Schedule of Financial Instruments Not Measured at Fair Value Fair Value, by Balance Sheet Grouping [Table Text Block] Diluted (in dollars per share) Earnings per share - Diluted (in dollars per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount 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 Liabilities Liabilities, Fair Value Disclosure [Abstract] Crypto Asset, Holding [Line Items] Crypto Asset, Holding [Line Items] Unrealized loss Unrealized Gain (Loss) on Investments Accrued compensation Increase (Decrease) in Employee Related Liabilities Amortization expense Intangible Asset, Finite-Lived, Amortization Expense 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] Crypto asset, loan receivable Crypto Asset, Loan Receivable Crypto Asset, Loan Receivable Intangible Assets Intangible Asset, Finite-Lived [Line Items] 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. Ownership [Domain] Ownership [Domain] 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. Douglas Friedman Trading Arrangement, Restricted Stock Units, Vesting Period Of March 15, 2026 – March 15, 2027 [Member] Douglas Friedman Trading Arrangement, Restricted Stock Units, Vesting Period Of March 15, 2026 – March 15, 2027 Broker-Dealer [Abstract] 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. Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash flows from financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Business Combination, Pro Forma Information, Nonrecurring Adjustment [Domain] Business Combination, Pro Forma Information, Nonrecurring Adjustment [Domain] Total revenue Total revenue Revenues Revenue from Contract with Customer, Excluding Assessed Tax Furniture, equipment, purchased software and leasehold improvements, net of accumulated depreciation and amortization Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Schedule of Outstanding Shares Of Common Stock Schedule of Stockholders Equity [Table Text Block] Receivable and due from related parties – Foreign exchange derivative contracts Derivative Asset Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Revenue Revenue from Contract with Customer [Text Block] Issuance of common stock from equity incentive plans Stock Issued During Period, Value, New Issues Dispositions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Common stock in the post-merger (in shares) Debt Conversion, Converted Instrument, Shares Issued Equity securities received upon conversion of receivables Equity Securities Received Upon Conversion of Receivables Equity Securities Received Upon Conversion of Receivables Subscription fees Subscription fees Subscription Fee Revenue [Member] Subscription fee revenue from granting access to institutional investors to the entity's electronic marketplaces. Segment Reporting [Table] Segment Reporting [Table] Excise tax associated with share repurchases Share Repurchase Program, Excise Tax Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Title of Individual [Axis] Title and Position [Axis] Troy Dixon [Member] Troy Dixon Investments In Equity Securities With Readily Determinable Fair Value Marketable Securities, Policy [Policy Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Schedule of Fair Value Measurement Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Operating income Operating Income (Loss) Additional adjustment Debt Instrument, Adjustment In Addition To Credit Adjustment Spread Debt Instrument, Adjustment In Addition To Credit Adjustment Spread Current Fiscal Year End Date Current Fiscal Year End Date Warrants and rights outstanding Warrants and Rights Outstanding Financial Resources Futures Commission Merchant, Commodity Exchange Act, Adjusted Net Capital Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Derivative [Line Items] Derivative [Line Items] Long-lived assets Long-Lived Asset, Excluding Financial Instrument, Customer Relationship, Mortgage Servicing Right, Deferred Policy Acquisition Cost, and Deferred Tax Asset, Amount Technology and communications Technology and communications Communications and Information Technology 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] Cumulative impairments on minority equity investments held Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount Dividends (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Variable Variable Pricing [Member] Contract with customer in which amount of consideration is based on variable components such as transaction based fees. Distributions to non-controlling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Reportable Segment Reportable Segment [Member] Reportable Segment Entity Information [Line Items] Entity Information [Line Items] 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 Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Axis] Allowance for credit losses recorded on available-for-sale debt securities Debt Securities, Available-for-Sale, Allowance for Credit Loss Equity Components [Axis] Equity Components [Axis] Accounts receivable Increase (Decrease) in Accounts Receivable Product and Service [Domain] Product and Service [Domain] Income taxes paid, net of (refunds) Income Tax Paid, after Refund Received Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Class A Common Stock Common Class A [Member] Entity Interactive Data Current Entity Interactive Data Current Variable Rate [Axis] Variable Rate [Axis] Less: Net income attributable to non-controlling interests Less: Net income attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Deferred tax liability Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] 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 Entity Small Business Entity Small Business 2019 Omnibus Equity Incentive Plan Omnibus2019 Equity Incentive Plan [Member] Represents the information pertaining to omnibus 2019 equity incentive plan. Comprehensive income attributable to Tradeweb Markets Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Number of shares withheld (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Noncontrolling Interest [Table] Noncontrolling Interest [Table] Furniture, Equipment, Purchased Software and Leasehold Improvements Property, Plant, and Equipment [Line Items] Subsequent Events [Abstract] Subsequent Events [Abstract] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Establishment of liabilities under tax receivable agreement Liabilities Assumed Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Stock split ratio, common stock Stockholders' Equity Note, Stock Split, Conversion Ratio MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Document Type Document Type Fair Value of Financial Instruments Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Foreign currency translation adjustment, tax benefit Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Fixed Fixed-Price Contract [Member] 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. Fair Value as of Grant Date Award Grant Date Fair Value Significant Accounting Policies Significant Accounting Policies [Text Block] 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] Cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Stock repurchase program, remaining authorized repurchase amount Share Repurchase Program, Remaining Authorized, Amount 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. Arrangement Duration Trading Arrangement Duration Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Other Equity Investments Other Equity Investments [Member] Other Equity Investments 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 Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name (Increase) decrease in operating assets: Increase (Decrease) in Operating Assets [Abstract] Income before taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and contingencies (Note 12) Commitments and Contingencies Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Equity pickup loss Income (Loss) from Equity Method Investments Accounts payable, accrued expenses and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] 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 Equity securities without readily determinable fair value, measurement input Equity Securities without Readily Determinable Fair Value, Measurement Input Equity Securities without Readily Determinable Fair Value, Measurement Input Fair value adjustments or credit losses Credit losses on available-for-sale debt securities Debt Securities, Available-for-Sale, Allowance for Credit Loss, Not Previously Recorded Increase (decrease) in operating liabilities: Increase (Decrease) in Operating Liabilities [Abstract] New billings Contract With Customer Liability, New Billings Amount of deferred revenue recognized for new billing arising during the current reporting period. Business Combinations Business Combination [Policy Text Block] Maximum contractual term Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Liabilities and Equity Liabilities and Equity [Abstract] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Remainder of 2026 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Class of warrant or right outstanding (in shares) Class of Warrant or Right, Outstanding Fair Value of Financial Instruments and Other Assets Fair Value Disclosures [Text Block] Significant Unobservable Inputs (Level 3) Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Supplemental disclosure of cash flow information Supplemental Cash Flow Information [Abstract] Maturity (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Initial term of lease Lessee, Operating Lease, Term of Contract Ownership percentage, continuing LLC owners Number of LLC Interests held by non-controlling interests Subsidiary, Ownership Percentage, Noncontrolling Owner Accounts payable, accrued expenses and other liabilities Accounts Payable and Accrued Liabilities PEO Name PEO Name Geographical [Axis] Geographical [Axis] Accordion feature Line of Credit Facility, Accordion Feature, Increase Limit Line of Credit Facility, Accordion Feature, Increase Limit Restricted cash Restricted cash Restricted cash Restricted Cash 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 Deferred revenue Deferred revenue balance - beginning of period Deferred revenue balance - ending of period Deferred revenue Contract with Customer, Liability Other segment items Segment Reporting, Other Segment Item, Amount Other assets Other assets Other Assets 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 Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Total LLC Interests outstanding (in shares) Minority Interest Total Number Of Interests The total number of shares of the subsidiary. Other Equity Investments Equity Method Investments [Policy Text Block] Beginning of period End of period Cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation 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. Schedule of Finite-Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] 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. Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] 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] Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Measurement Frequency [Domain] Measurement Frequency [Domain] Awards Granted to Employee Share-Based Payment Arrangement, Employee [Member] Subsequent Event [Table] Subsequent Event [Table] Equity method investment percentage Equity Method Investment, Ownership Percentage Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Employee compensation and benefits Employee compensation and benefits Labor and Related Expense Douglas Friedman Trading Arrangement, Restricted Stock Units, Vesting Period Of March 15, 2024 – March 15, 2027 [Member] Douglas Friedman Trading Arrangement, Restricted Stock Units, Vesting Period Of March 15, 2024 – March 15, 2027 Allowance for Credit Losses Credit Loss, Financial Instrument [Policy Text Block] Activities related to exchanges of LLC Interests (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Customer [Domain] Customer [Domain] Investment, Name [Domain] Investment, Name [Domain] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic (in dollars per share) Earnings per share - Basic (in dollars per share) Earnings Per Share, Basic Measurement Input Type [Axis] Measurement Input Type [Axis] Share repurchases pursuant to share repurchase programs Payments for Repurchase of Common Stock Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] 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. Award Type [Axis] Award Type [Axis] Voting power percentage Voting power percentage Voting power percentage. PRSUs Equity Settled Performance Based Restricted Stock Units [Member] Equity Settled Performance Based Restricted Stock Units [Member] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Retained earnings Retained Earnings (Accumulated Deficit) 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. Product and Service [Axis] Product and Service [Axis] Investment in equity securities Equity Securities, FV-NI Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Number of reporting units Goodwill, Reporting Unit, Number Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Regulatory Capital Regulatory Capital Regulatory capital as calculated for each entity under applicable regulations. Common Stock Common Stock [Member] Investment in available for sale debt securities Debt Securities, Available-for-Sale Canton Coins Canton Coins [Member] Canton Coins Annualized Volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] International Non-US [Member] Noncontrolling Interest [Abstract] Noncontrolling Interest [Abstract] Unrealized gains Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount Derivative Contract [Domain] Derivative Contract [Domain] Digital Assets and Other Investments at Fair Value Crypto Asset, Policy [Policy Text Block] Crypto Asset, Policy Equity Awards Adjustments Equity Awards Adjustments [Member] Revenue recognized Contract With Customer, Liability, Revenue Recognized Including New Billings Contract With Customer, Liability, Revenue Recognized Including New Billings Total liabilities and equity Liabilities and Equity Options Share-Based Payment Arrangement, Option [Member] Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Regulatory Capital Requirements Regulatory Capital Requirements [Text Block] The entire disclosure of capital requirements and required financial resources under applicable regulations. Non-controlling interests Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Asset Class [Axis] Asset Class [Axis] Related Party [Domain] Related and Nonrelated Parties [Domain] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Four Lessee, Operating Lease, Liability, to be Paid, after Year Four Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Regulatory Capital Requirements Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Other income (loss), net Other Nonoperating Income (Expense) Deferred tax asset Other Noncash Income Tax Expense Name Awards Close in Time to MNPI Disclosures, Individual Name Cash paid for investments Payments to Acquire Investments 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] Less: Other comprehensive income (loss) attributable to non-controlling interests Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest Crypto Asset [Axis] Crypto Asset [Axis] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Douglas Friedman Trading Arrangement, Class A Common Stock, Upon Vested On March 17, 2027 [Member] Douglas Friedman Trading Arrangement, Class A Common Stock, Upon Vested On March 17, 2027 Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Preferred stock, $0.00001 par value; 250,000,000 shares authorized; none issued or outstanding Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Receivable from/payable to brokers and dealers and clearing organizations, net Increase (Decrease) in Receivable from Broker-Dealer and Clearing Organization Douglas Friedman Trading Arrangement, Restricted Stock Units, Vesting Period Of March 17, 2025 – March 17, 2027 [Member] Douglas Friedman Trading Arrangement, Restricted Stock Units, Vesting Period Of March 17, 2025 – March 17, 2027 Hedging Designation [Domain] Hedging Designation [Domain] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Class of Stock [Domain] Class of Stock [Domain] Regulatory Capital Requirement Regulatory Capital Requirement Amount of regulatory capital required to be maintained for each entity under applicable regulations. Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] 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 Foreign currency forward contracts – Gross notional amount Foreign Exchange Forward [Member] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Douglas Friedman Trading Arrangement, Class A Common Stock [Member] Douglas Friedman Trading Arrangement, Class A Common Stock Total assets measured at fair value Assets, Fair Value Disclosure Name Measure Name Crypto asset, realized gain Crypto Asset, Realized Gain, Nonoperating Income Taxes Income Tax Disclosure [Text Block] Restricted Cash Equivalent [Abstract] Restricted Cash Equivalent [Abstract] Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Other (income) loss, net Other Noncash Income (Expense) TWM LLC TWM LLC [Member] TWM LLC 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 Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Digital Asset Loan Receivable Digital Asset Loan Receivable [Member] Digital Asset Loan Receivable TESBV Tradeweb Execution Services B.V. [Member] Tradeweb Execution Services B.V. 2021 Share Repurchase Program 2021 Share Repurchase Program [Member] 2021 Share Repurchase Program Additional Paid-In Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Impairment of goodwill Goodwill, Impairment Loss Restricted Cash Restricted Assets Disclosure [Text Block] Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent 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. Capitalized software development costs Payments for Software Company Selected Measure Amount Company Selected Measure Amount Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Crypto asset, sale, number of units Crypto Asset, Sale, Number of Units Crypto Asset, Sale, Number of Units Market Data Market Data Client Sector [Member] The market data client sector. Unrealized gain relating to level 3 assets held Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Payable and due to related parties – Foreign exchange derivative contracts Derivative Liability Non-PEO NEO Non-PEO NEO [Member] Translation of Foreign Currency and Foreign Exchange Derivative Contracts Foreign Currency Transactions and Translations Policy [Policy Text Block] Entity Address, Address Line One Entity Address, Address Line One Provision for income taxes Income Tax Expense (Benefit) TAPL Tradeweb Asia Pte. Ltd. [Member] Tradeweb Asia Pte. Ltd. Realized and unrealized (loss) gain Gain (Loss), Foreign Currency Transaction, before Tax Net transfers (to) from non-controlling interests Transfers From (To) Noncontrolling Interests Amount of net transfers from (to) non controlling interest. Risks and Uncertainties [Abstract] Risks and Uncertainties [Abstract] Adjustments to reconcile net income to net cash provided by (used in) operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Convertible Notes Payable Convertible Notes Payable [Member] 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] Award Timing Method Award Timing Method [Text Block] Institutional Institutional Client Sector [Member] The institutional client sector. Pushdown Accounting Consolidation, Policy [Policy Text Block] Net increase (decrease) in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Numerator: Net Income (Loss) Attributable to Parent [Abstract] Intangible assets, net of accumulated amortization Other Intangible Assets, Net 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 Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Bridge Loan Bridge Loan [Member] Location, Statement of Financial Position, Balance [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Retail Retail Client Sector [Member] The retail client sector. Public Investors Public Investors [Member] This member stands for public investors, collectively. Restatement Determination Date: Restatement Determination Date [Axis] Proceeds from stock-based compensation exercises Proceeds from Stock Options Exercised Awards Granted To Non-employee Share-Based Payment Arrangement, Nonemployee [Member] Amortization of pushdown accounting allocation Amortization Period Pushdown Accounting Adjustment Amortization period for pushdown accounting adjustments. Leases Lessee, Leases [Policy Text Block] Cash and restricted cash Restricted Cash and Cash Equivalents, Fair Value Disclosure Restricted Cash and Cash Equivalents, Fair Value Disclosure Schedule of Recognized Revenue and Remaining Deferred Revenue Balance Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Douglas Friedman Trading Arrangement, Class A Common Stock, Vested On March 15, 2027 [Member] Douglas Friedman Trading Arrangement, Class A Common Stock, Vested On March 15, 2027 Fed Funds Effective Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Revenues Revenue: Revenues [Abstract] Tax receivable agreement, payment term Tax Receivable Agreement, Term Tax Receivable Agreement, Term Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]