Performance adjustment (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Adjustment In Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Adjustment In Period DW SEF Dw Sef Llc [Member] DW SEF LLC (DW SEF) is a swap execution facility regulated by the Commodities Future Trading Commission. Hedging Designation [Domain] Hedging Designation [Domain] Share repurchase program, amount authorized Stock Repurchase Program, Authorized Amount Supplemental disclosure of cash flow information Supplemental Cash Flow Information [Abstract] Customer [Domain] Customer [Domain] 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. Statutory U.S. federal income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Vested in period (in shares) Vests (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period State and Local Current State and Local Tax Expense (Benefit) Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Net income attributable to Tradeweb Markets Inc. Net income attributable to Tradeweb Markets Inc. Net income attributable to parent Net Income (Loss) Attributable to Parent Consolidated Entities [Axis] Consolidated Entities [Axis] Payroll taxes paid for stock-based compensation Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Lease right-of-use assets Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Excess Financial Resources Futures Commission Merchant, Commodity Exchange Act, Excess Net Capital Risks and Uncertainties [Abstract] Risks and Uncertainties [Abstract] Net operating losses Deferred Tax Assets, Operating Loss Carryforwards Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Deferred costs Deferred Offering Costs Income Statement Location [Axis] Income Statement Location [Axis] Wholesale Wholesale Client Sector [Member] The wholesale client sector. Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Transaction costs Business Combination, Acquisition Related Costs Statistical Measurement [Domain] Statistical Measurement [Domain] Performance adjustment (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Adjustment In Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Adjustment In Period, Weighted Average Grant Date Fair Value Security Exchange Name Security Exchange Name TW SEF Tw Sef Llc [Member] TW SEF LLC (TW SEF) is a swap execution facility regulated by the Commodities Future Trading Commission. Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Foreign currency translation adjustment, tax benefit Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Forfeitures and adjustments (in dollars per share) Forfeitures (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Amortization expense related to capitalized software development costs Non-Capitalized Computer Software Amortization Non-Capitalized Computer Software Amortization Schedule of Recognized Revenue and Remaining Deferred Revenue Balance Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Forfeitures and adjustments (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Weighted average remaining lease term (years) Operating Lease, Weighted Average Remaining Lease Term Translation of Foreign Currency and Foreign Currency Forward Contracts Foreign Currency Transactions and Translations Policy [Policy Text Block] Floor Debt Instrument Floor Rate The Percentage of floor rate under debt instrument. Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] 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. Weighted Average Expected Dividend Yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Net increase (decrease) in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Interest accrued Income Tax Examination, Interest Accrued Tax receivable agreement liability adjustment Tax receivable agreement liability adjustment Tax receivable agreement liability adjustment Tax Receivable Agreement Liability, Adjustment Tax Receivable Agreement Liability, Adjustment Entity File Number Entity File Number Weighted Average Expected Volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Intrinsic value of options exercised during the year Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Adjustment in goodwill Goodwill, Purchase Accounting Adjustments Vested options outstanding (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Grant Date Fair Value Subsequent Event Type [Domain] Subsequent Event Type [Domain] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Amortization expense Amortization of Intangible Assets Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Stock repurchase program, remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Increase in prior year tax positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Number of votes per common stock Number Of Votes Per Common Stock Number Of Votes Per Common Stock Total net deferred tax asset (liability) Deferred Tax Assets, Net Antidilutive shares (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted average borrowing rate Operating Lease, Weighted Average Discount Rate, Percent Revenue recognized that was previously deferred Contract with Customer, Liability, Revenue Recognized Underlying Asset Class [Axis] Underlying Asset Class [Axis] 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. Percentage of Performance Modifier Percentage of Performance Modifier Percentage of Performance Modifier Sale of Stock [Axis] Sale of Stock [Axis] Exercises (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Grant Date Fair Value Subsequent Events [Abstract] Subsequent Events [Abstract] Equity-Settled PRSUs Performance Shares Settled With Equity [Member] Performance Shares Settled With Equity Percentage of economic interest Percentage of Economic Interest in Limited Liability Company Percentage of Economic Interest in Limited Liability Company Total deferred tax assets, net Deferred Tax Assets, Net of Valuation Allowance Business Combination and Asset Acquisition [Abstract] Commitment fee, percentage Line of Credit Facility, Commitment Fee Percentage Accounts receivable Accounts Receivable, Related Parties Fair value of vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Weighted-average grant-date fair value (in dollars per share) Grants (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 Business Acquisition [Axis] Business Acquisition [Axis] Financial Resources Futures Commission Merchant, Commodity Exchange Act, Adjusted Net Capital Adjustment in other assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Assets Title of Individual [Domain] Title of Individual [Domain] Foreign currency forward contracts not designated in accounting hedge relationship Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Summary of Intangible Assets Which Have an Indefinite Useful Life Schedule of Indefinite-Lived Intangible Assets [Table Text Block] Award Type [Domain] Award Type [Domain] Estimated annual future amortization for existing intangibles assets Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Local Phone Number Local Phone Number Assets Assets [Abstract] Related Party Transactions [Abstract] Related Party Transactions [Abstract] Fair Value, Nonrecurring Fair Value, Nonrecurring [Member] Vested options outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Income Tax Disclosure [Line Items] Operating Loss Carryforwards [Line Items] Granted (in shares) Grants (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Preferred stock, $0.00001 par value; 250,000,000 shares authorized; none issued or outstanding Preferred Stock, Value, Issued Furniture, Equipment, Purchased Software and Leasehold Improvements Property, Plant and Equipment, Policy [Policy Text Block] Distributions to non-controlling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Conversion ratio Common Stock Conversion Ratio Common Stock Conversion Ratio Options outstanding at beginning of period (in shares) Options outstanding at end of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Deferred tax asset Other Noncash Income Tax Expense Tradename Trade Names [Member] Retained Earnings Retained Earnings [Member] Initial Public Offering IPO [Member] Refinitiv Direct Owner Refinitiv Direct Owner [Member] Refinitiv Direct Owner Ownership interest Number of LLC Interests held by Tradeweb Markets Inc. Noncontrolling Interest, Ownership Percentage by Parent Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Restricted Cash Equivalents [Abstract] Restricted Cash Equivalents [Abstract] Activities related to the follow-on offering and other exchanges of LLC Interests, net of offering costs and cancellations Stock Issued During Period, Value, Conversion of Convertible Securities Dividends Payments of Ordinary Dividends Members' Capital Member Units [Member] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] LLC Interests Limited Liability Company Units [Member] Limited Liability Company Units Related Party [Axis] Related Party [Axis] Accounts receivable Increase (Decrease) in Accounts Receivable Working capital adjustments Working capital adjustments Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred Lease right-of-use assets obtained in exchange for lease liabilities, net of modifications and terminations Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Components of Deferred Tax Assets (Liabilities) Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Refinitiv Llc Owner Refinitiv Llc Owner [Member] Refinitiv Llc Owner Furniture, Equipment, Purchased Software and Leasehold Improvements Property, Plant and Equipment [Line Items] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Vesting percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Number of shares withheld (in shares) Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Software Development Costs Research, Development, and Computer Software Disclosure [Text Block] Deferred revenue Increase (Decrease) in Deferred Revenue Deferred revenue Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue Basic (in dollars per share) Earnings per share - Basic (in dollars per share) Earnings Per Share, Basic Number of share owned (in shares) Number of share owned Number of share owned. Number of LLC Interest held by parent (in shares) Number of LLC Interests held by Tradeweb Markets Inc. (in shares) Minority Interest Number Of Interests Held By Parent The parent entity's interest in the subsidiary. Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Year three Lessee, Operating Lease, Liability, to be Paid, Year Three Revenue Revenue from Contract with Customer [Text Block] Receivable from affiliates Receivable from affiliates Receivable from affiliates – Foreign currency forward contracts Due from Affiliates Balance outstanding at beginning of period (in shares) Balance options outstanding at end of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract] Schedule of Breakdown of Revenues Between Fixed and Variable Revenues Disaggregation of Revenue [Table Text Block] Equity-Settled PRSUs RSUs Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Class C Common Stock Common Class C [Member] Receivable from brokers and dealers and clearing organizations Receivable from brokers and dealers and clearing organizations Receivables from Brokers-Dealers and Clearing Organizations Tax credits Deferred Tax Assets, Tax Credit Carryforwards Weighted Average Grant-Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Share-based payment arrangement, decrease for tax withholding obligation Share-based payment arrangement, decrease for tax withholding obligation Share-based Payment Arrangement, Decrease for Tax Withholding Obligation Less: Pre-IPO net income attributable to Tradeweb Markets LLC Pre-IPO net income attributable to Tradeweb Markets LLC Pre-IPO net income attributable to Tradeweb Markets LLC Net Income (Loss) Attributable To Limited Liability Company The amount of net income (loss) attributable to limited liability company. Number of shares authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Cash for amounts included in the measurement of operating lease liability Operating Lease, Payments Recoveries resulting in reversal of credit loss expense Accounts Receivable, Allowance for Credit Loss, Recovery Tax Receivable Agreement Tax Receivable Agreement Liability Disclosure [Text Block] The entire disclosure of tax receivable agreement liability. Related party, payable reversal Related Party Transaction, Payable Reversal Related Party Transaction, Payable Reversal Deferred taxes arising from issuance of common stock from equity incentive plans Adjustments to Additional Paid in Capital, Income Deferred Income Tax Effect from Share Repurchases Adjustments to Additional Paid in Capital, Income Deferred Income Tax Effect from Share Repurchases Reversal of credit loss expense Accounts Receivable, Credit Loss Expense (Reversal) Schedule of Revenue and Long-Lived Assets by Geographic Location Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Letter of credit issued Long-term Debt, Gross Goodwill [Roll Forward] Goodwill [Roll Forward] Payments on tax receivable agreement liability Payments on Tax Receivable Agreement, Liability Payments on Tax Receivable Agreement, Liability Entity Voluntary Filers Entity Voluntary Filers Deposits with Clearing Organizations Deposits With Clearing Organizations [Policy Text Block] Disclosure of accounting policy for deposits with clearing organizations. TESL Tradeweb Execution Services Limited [Member] Tradeweb Execution Services Limited Total assets measured at fair value Assets, Fair Value Disclosure Quoted Prices in active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Conversion ratio Noncontrolling Interest, Conversion Ratio The conversion ratio of shares of non-controlling interests. Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Impairment of goodwill Goodwill, Impairment Loss Less: Foreign currency translation adjustments attributable to non-controlling interests Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Software Development Costs Software Development [Member] Entity Small Business Entity Small Business Employee equity compensation payable Increase Decrease In Equity Compensation Payable The increase (decrease) during the period in equity compensation payable. Base rate Base Rate [Member] Equity Compensation Effective Income Tax Rate Reconciliation, Equity Compensation, Percent Effective Income Tax Rate Reconciliation, Equity Compensation, Percent Secured Operating Lease Secured Operating Lease [Member] Secured Operating Lease Increase in current year tax positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Intangible Assets Finite-Lived Intangible Assets [Line Items] Intangible assets that are subject to amortization Finite-Lived Intangible Assets [Line Items] Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Total liabilities and equity Liabilities and Equity Other Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Year five Lessee, Operating Lease, Liability, to be Paid, Year Five 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. Tax Receivable Agreement Tax Receivable Agreement No definition available. Exercises (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Restricted cash Restricted cash Restricted Cash Additional paid-in capital Additional Paid in Capital Schedule of Non-capitalized Software Costs and Routine Maintenance Costs Schedule Of Non Capitalized Computer Software [Table Text Block] Schedule Of Non Capitalized Computer Software Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Liabilities and Equity Liabilities and Equity [Abstract] 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. Net proceeds Proceeds from Issuance Initial Public Offering Derivative [Line Items] Derivative [Line Items] Earnings Per Share Earnings Per Share [Text Block] Aggregate value of share repurchase Treasury Stock, Value, Acquired, Cost Method Expenses Operating Expenses [Abstract] Average price per share (in dollars per share) Treasury Stock Acquired, Average Cost Per Share Entity Interactive Data Current Entity Interactive Data Current Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] 2025 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Four Adjustment in accounts payable, accrued expenses and other liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Decrease In Accounts Payable, Accrued Expenses And Other Liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Payable, Accrued Expenses And Other Liabilities Settlements Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Minimum Minimum [Member] Nonrecurring Adjustment [Domain] Nonrecurring Adjustment [Domain] Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] EA Execution Access [Member] Execution Access Affiliated Entity Affiliated Entity [Member] Noncontrolling Interest [Abstract] Noncontrolling Interest [Abstract] Year two Lessee, Operating Lease, Liability, to be Paid, Year Two Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Comprehensive income attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Schedule of Class of Common Stock Par Value, Votes and Economic Rights Schedule of Stock by Class [Table Text Block] Number of LLC Interest (in shares) 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. Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Gross unrecognized tax benefits as of January 1, 2021 Gross unrecognized tax benefits as of December 31, 2021 Unrecognized Tax Benefits Deferred tax assets, gross Deferred Tax Assets, Gross Income Tax Authority [Domain] Income Tax Authority [Domain] Common Class Pa Shares Common Class Pa Shares [Member] Common Class Pa Shares Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Entity Address, State or Province Entity Address, State or Province Follow On Offering Follow On Offering [Member] Follow On Offering Deferred tax asset Deferred Income Tax Assets, Net Adjustments to non-controlling interests Minority Interest Increase Decrease From Adjustments Amount of increase (decrease) in noncontrolling interest from adjustments. Issuance of common stock Stock Issued During Period, Value, New Issues Local Jurisdiction Local Jurisdiction [Member] Local Jurisdiction Cash paid for acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Axis] Beginning balance ( in shares) Ending balance (in shares) Shares, Outstanding Vested options outstanding (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Components of Provisions for Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Stock-Based Compensation Plans Share-based Payment Arrangement [Text Block] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Leases Lessee, Leases [Policy Text Block] Accounting Policies [Abstract] Accounting Policies [Abstract] Voting power threshold percentage to require conversion of shares Voting Power Threshold Percentage To Require Conversion of Shares Voting Power Threshold Percentage To Require Conversion of Shares Award, options, outstanding, weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Derivative Instrument [Axis] Derivative Instrument [Axis] Offering costs from issuance of Class A common stock in the IPO and follow-on offerings Offering costs incurred Payments of Stock Issuance Costs Issuance of common stock (in shares) Issuance of common stock, net of offering costs and cancellations (in shares) Stock Issued During Period, Shares, New Issues 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. Threshold percentage of economic interest for conversion Threshold Percentage of Economic Interest For Conversion Threshold Percentage of Economic Interest For Conversion Excess Regulatory Capital Excess Regulatory Capital Amount by which the entity's regulatory capital (as defined) exceeds the requirement. Accounts payable, accrued expenses and other liabilities Accounts Payable and Accrued Liabilities Federal Current Federal Tax Expense (Benefit) 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. Letter of credit guaranteed by Refinitiv Letters of credit outstanding Letters of Credit Outstanding, Amount Lease liabilities Operating lease liabilities Lease liability Operating Lease, Liability Document Transition Report Document Transition Report Foreign currency transaction gain (loss), before tax Foreign Currency Transaction Gain (Loss), before Tax 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 Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] Common stock Common Stock, Value, Issued Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Axis] Weighted-average recognition period Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Balance outstanding at end of period (in dollars per share) Balance outstanding at beginning of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Goodwill recognized in connection with the NFI Acquisition Goodwill, Acquired During Period Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Adjusted For Refinitiv Transaction Adjusted For Refinitiv Transaction [Member] Reflects a new basis of accounting resulting from the Refinitiv transaction. Commitments and contingencies (Note 17) Commitments and Contingencies Subsequent Event [Table] Subsequent Event [Table] Leases Lessee, Operating Leases [Text Block] Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Schedule of Financial Instruments Not Measured at Fair Value Fair Value, by Balance Sheet Grouping [Table Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Acquisitions Business Combination Disclosure [Text Block] 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. ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Consulting service fee for follow on offering Consulting Service Fee for Follow on Offering The amount of consulting service incurred for follow on offering. Schedule of Assumptions Used to Estimate the Fair Value of The Option Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] 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 Ownership [Axis] Ownership [Axis] Foreign Deferred Foreign Income Tax Expense (Benefit) Legal Entity [Axis] Legal Entity [Axis] Auditor Name Auditor Name Cover [Abstract] Additional dilutive shares (in shares) Dilutive effect (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Business Segment and Geographic Information Revenues from External Customers and Long-Lived Assets [Line Items] Total expenses Operating expenses Costs and Expenses Class of Stock [Axis] Class of Stock [Axis] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Net interest income (expense) Interest Income (Expense), Net Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount One-month LIBOR One Month London Inter Bank Offered Rate [Member] One Month London Inter Bank Offered Rate. Components of Uncertain Tax Positions Summary of Income Tax Contingencies [Table Text Block] Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Change in Contract with Customer Change In Contract with Customer, Liability [Roll Forward] Change In Contract with Customer, Liability Purchase of LLC Interests Payments for Repurchase of Redeemable Noncontrolling Interest Adjustment to Class C Shares and Class P(C) shares in mezzanine capital Adjustments to Additional Paid in Capital, Increase in Carrying Amount of Redeemable Preferred Stock Non-Controlling Interests Noncontrolling Interest [Line Items] Selling, General and Administrative Expenses Selling, General and Administrative Expenses [Member] Dividends (in dollars per share) Cash dividend declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity [Domain] Entity [Domain] Total revenue Total revenue Revenue from Contract with Customer, Excluding Assessed Tax Comprehensive income - Tradeweb Markets Inc. Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Software development costs capitalized Capitalized Computer Software, Additions (Increase) decrease in operating assets: Increase (Decrease) in Operating Assets [Abstract] Current: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Options Share-based Payment Arrangement, Option [Member] Furniture, Equipment, Purchased Software and Leasehold Improvements Furniture Equipment And Purchased Software [Member] Furniture, equipment and purchased software. Common units exchanged (in shares) Common Unit Exchanged Number Common Unit Exchanged Number Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Payable to affiliates Payable to affiliates Payable to affiliates – Foreign currency forward contracts Due to Affiliate Income Tax Disclosure [Table] Operating Loss Carryforwards [Table] Total LLC Interests outstanding Minority Interest Total Ownership Percentage The total ownership interest on noncontrolling interest expressed as a percentage. Common Stock Common Stock [Member] Variable Rate [Axis] Variable Rate [Axis] Business Segment and Geographic Information Segment Reporting Disclosure [Text Block] Other Stockholders Other Stockholders [Member] Other Stockholders Operating income Operating Income (Loss) Professional fees Professional fees Professional Fees Other Other fees Financial Service, Other [Member] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] 2023 2023 Finite-Lived Intangible Asset, Expected Amortization, Year Two Hedging Designation [Axis] Hedging Designation [Axis] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Document Fiscal Year Focus Document Fiscal Year Focus Stock-based compensation expense Share-based Payment Arrangement, Noncash Expense Variable Rate [Domain] Variable Rate [Domain] Additional Paid-In Capital Additional Paid-in Capital [Member] Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Depreciation expense Depreciation Credit Risk Allowance for Credit Losses [Text Block] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] 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 Accounts receivable, net of allowance for credit losses of $273 and $243 at December 31, 2021 and 2020, 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. Entity Information [Line Items] Entity Information [Line Items] Gross notional amount Derivative, Notional Amount Stock-based compensation expense under the plan APIC, Share-based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition Stock repurchased and retired (in shares) Stock Repurchased and Retired During Period, Shares Purchases of furniture, equipment, software and leasehold improvements Payments to Acquire Property, Plant, and Equipment Effect of the reorganization transactions Effect Of Reorganization Transactions Effect Of Reorganization Transactions Cancellation ratio Common Stock Cancellation Ratio Common Stock Cancellation Ratio Maximum Maximum [Member] Liquid Financial Assets Liquid Financial Assets Liquid financial assets calculated under the Commodity Exchange Act. Share-based Payment Arrangement [Abstract] Share-based Payment Arrangement [Abstract] Reconciliation of the statutory tax rate Effective Income Tax Rate Reconciliation, Percent [Abstract] Total liabilities Liabilities 2022 2022 Finite-Lived Intangible Asset, Expected Amortization, Year One Award Type [Axis] Award Type [Axis] Grants (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Options outstanding intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Schedule of Maturity of Lease Liabilities and Future Minimum Lease Payments Lessee, Operating Lease, Liability, Maturity [Table Text Block] Allocation of equity to non-controlling interests Minority Interest Increase From Allocation Of Equity Minority Interest Increase From Allocation Of Equity Total stockholders’ equity attributable to Tradeweb Markets Inc. Stockholders' Equity Attributable to Parent Common Class P1a Shares Common Class P1a Shares [Member] Common Class P1a Shares Net operating loss carryforwards Operating Loss Carryforwards Common stock, shares issued (in shares) Number of shares owned (in shares) Common Stock, Shares, Issued Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued City Area Code City Area Code Accounts payable, accrued expenses and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Intrinsic value of vested options outstanding and exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Receivable from/payable to affiliates, net Increase (Decrease) Due from Affiliates Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Capital distributions Capital distributions Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared Entity Address, City or Town Entity Address, City or Town Adjustment to additional paid in capital due to consulting service fee Adjustment to Additional Paid in Capital due to Consulting Service Fee The amount of adjustment to additional paid in capital for consulting service fee. Share repurchases pursuant to the Share Repurchase Program Payments for Repurchase of Common Stock Useful life Property, Plant and Equipment, Useful Life Number of shares cancelled (in shares) Common Stock, Shares, Retired Common Stock, Shares, Retired Stock-based compensation Limited Liability Company (LLC) Members' Equity, Unit-based Payment Arrangement Non-cash financing activities - Items arising from LLC Interest ownership changes Noncash Investing and Financing Items [Abstract] Shares contributed by Refinitiv Owner (in shares) Stock Contributed During Period Acquiree Majority Owner Stock Contributed During Period Acquiree Majority Owner Schedule of Indefinite-Lived Intangible Assets [Table] Schedule of Indefinite-Lived Intangible Assets [Table] 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. Balance Sheet Location [Axis] Balance Sheet Location [Axis] Required Liquid Financial Assets Required Liquid Financial Assets Amount of liquid financial assets required to be maintained under the Commodity Exchange Act. Measurement Frequency [Domain] Measurement Frequency [Domain] Total current tax expense Current Income Tax Expense (Benefit) Accrued compensation Increase (Decrease) in Employee Related Liabilities Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Total Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Income tax benefit Income tax benefit Share-based Payment Arrangement, Expense, Tax Benefit Weighted average share price (in dollars per share) Weighted Average Share Price (in dollars per share) Share Price Retained earnings Retained Earnings (Accumulated Deficit) Initial term of lease Lessee, Operating Lease, Term of Contract Tradeweb Markets Inc Tradeweb Markets Inc [Member] Tradeweb Markets Inc., the reporting entity. RSUs Restricted Stock Units (RSUs) [Member] Statement of Stockholders' Equity [Abstract] Schedule of Preliminary Purchase Price Allocated Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Entity Filer Category Entity Filer Category Total deferred tax liabilities Deferred Tax Liabilities, Gross Business Acquisition [Line Items] Business Acquisition [Line Items] Deferred revenue Contract with Customer, Liability, Related Parties Amount of obligation to transfer good or service to related parties for which consideration has been received or is receivable. Weighted Average Risk-Free Interest Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Operating income: Interest Income, Securities, Operating, by Taxable Status [Abstract] Deposits with clearing organizations Less: Deposits with clearing organizations acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits with Clearing Organizations Income Statement [Abstract] Income Statement [Abstract] Percentage of combined voting power of common stock Percentage of Combined Voting Power of Common Stock Percentage of Combined Voting Power of Common Stock Entity Registrant Name Entity Registrant Name Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Bank Stockholders Bank Stockholders [Member] Information relating to the Bank Stockholders. Indefinite-lived intangible assets Indefinite-lived Intangible Assets (Excluding Goodwill) Proceeds from stock-based compensation exercises Proceeds from Stock Options Exercised Software development costs, net of accumulated amortization Software development costs, net of accumulated amortization Capitalized Computer Software, Net 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 Tax receivable agreement liability and deferred taxes arising from the reorganization transactions, IPO and follow-on offering and other LLC Interest ownership changes 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. Forfeitures and adjustments (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Provision for income taxes Total provision for income taxes Income Tax Expense (Benefit) Total equity Beginning balance Ending balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 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. Amendment Flag Amendment Flag Equity Components [Axis] Equity Components [Axis] Entity Tax Identification Number Entity Tax Identification Number Fair Value Disclosures [Abstract] Fair Value Disclosures [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. Document Fiscal Period Focus Document Fiscal Period Focus Pre-IPO capital distributions Payments of Capital Distribution Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Total future lease payments Lessee, Operating Lease, Liability, to be Paid Sale of Stock [Domain] Sale of Stock [Domain] Forfeitures (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Weighted average shares outstanding: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Schedule of Information Regarding Revenue by Client Sector Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Technology and communications Communications and Information Technology Stock-Based Compensation Share-based Payment Arrangement [Policy Text Block] Share repurchases pursuant to the Share Repurchase Program Stock Repurchased During Period, Value Accrued compensation Employee-related Liabilities Fair Value of Financial Instruments Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Federal Deferred Federal Income Tax Expense (Benefit) Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Expired (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Schedule of Balances From Transactions with Affiliates Included in the Consolidated Statements Schedule of Related Party Transactions [Table Text Block] Fair Value Measurement Fair Value Measurement, Policy [Policy Text Block] Product and Service [Axis] Product and Service [Axis] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Equity investment without readily determinable fair values Equity Securities without Readily Determinable Fair Value, Amount Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Entity Public Float Entity Public Float Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Refinitiv Refinitiv [Member] Refinitiv, formerly the Thomson Reuters Financial & Risk Business. Grants (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Equity Component [Domain] Equity Component [Domain] Options outstanding at beginning of period (in dollars per share) Options outstanding at end of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Option, Nonvested, Weighted Average Exercise Price Other - See Note 14 Stockholders' Equity, Other Year one Lessee, Operating Lease, Liability, to be Paid, Year One Share repurchases pursuant to the share repurchase program (in shares) Stock Repurchased During Period, Shares Foreign currency translation adjustments, with no tax benefit for each of the years ended December 31, 2021, 2020 and 2019 Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Subscription fees Subscription Fee Revenue [Member] Subscription fee revenue from granting access to institutional investors to the entity's electronic marketplaces. All-cash acquisition Purchase price, net of cash and deposits acquired and excluding working capital adjustments Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net of Acquired Cash and Restricted Cash, Deposits with Clearing Organizations Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net of Acquired Cash and Restricted Cash, Deposits with Clearing Organizations Net income attributable to Tradeweb Markets Inc. and non-controlling interests Profit Loss After Pre IPO Profit Loss After Pre IPO Deferred tax assets: Components of Deferred Tax Assets [Abstract] Statement [Line Items] Statement [Line Items] Shares issued to acquire TWM LLC (in shares) Stock Issued During Period, Shares, Acquisitions Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Purchase of equity investments Payments to Acquire Investments United States Domestic Tax Authority [Member] Liabilities Liabilities [Abstract] Software Development Costs Internal Use Software, Policy [Policy Text Block] Year four Lessee, Operating Lease, Liability, to be Paid, Year Four Tradeweb Markets LLC TradeWeb Markets Llc [Member] Tradeweb Markets LLC. Allowance for Credit Losses Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block] Income before taxes Income before taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Significant Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Valuation Allowance Deferred Tax Assets, Valuation Allowance Subsidiary, Sale of Stock [Line Items] Subsidiary, Sale of Stock [Line Items] Deposits with clearing organizations Increase (Decrease) in Deposit Assets Auditor Location Auditor Location Variable Variable Pricing [Member] Contract with customer in which amount of consideration is based on variable components such as transaction based fees. Segment Reporting [Abstract] Segment Reporting [Abstract] Amortization Period Amortization Period Finite-Lived Intangible Asset, Useful Life Employee compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits Customer [Axis] Customer [Axis] Use of Estimates Use of Estimates, Policy [Policy Text Block] Schedule of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Grants (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Document Annual Report Document Annual Report Schedule of Total Stock-based Compensation Expense Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Tax Receivable Agreement adjustment Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent Title of 12(b) Security Title of 12(b) Security Allocation of equity to non-controlling interests arising from the reorganization transactions and IPO Transfers From (To) Noncontrolling Interests, Allocation of Equity to N C I Arising From Reorganization And IPO Transfers From (To) Noncontrolling Interests, Allocation of Equity to N C I Arising From Reorganization And IPO Proceeds from issuance of Class A common stock in the IPO and follow-on offerings, net of underwriting discounts Proceeds from Issuance of Common Stock Total assets Assets Other assets Other Assets Related Parties Other assets from related parties. Deferred tax liabilities Components of Deferred Tax Liabilities [Abstract] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Geographical [Domain] Geographical [Domain] Numerator: Net Income (Loss) Attributable to Parent [Abstract] Title of Individual [Axis] Title of Individual [Axis] Document Type Document Type 2019 Omnibus Equity Incentive Plan Omnibus2019 Equity Incentive Plan [Member] Represents the information pertaining to omnibus 2019 equity incentive plan. Summary of RSU Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Non- Controlling Interests Noncontrolling Interest [Member] Product and Service [Domain] Product and Service [Domain] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] April 2020 Follow-On Offering April Two Thousand And Twenty Follow On Offering [Member] April Two Thousand And Twenty Follow On Offering Derivative Contract [Domain] Derivative Contract [Domain] Contract with Customer, Basis of Pricing [Domain] Contract with Customer, Basis of Pricing [Domain] Less: Net income attributable to non-controlling interests Less: Net income attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Non-Controlling Interests Noncontrolling Interest Disclosure [Text Block] Software Development Costs Software Development Costs [Abstract] Software Development Costs Schedule of Financial Resources and Liquid Financial Resources Futures Commission Merchant, Minimum Financial Requirement [Table Text Block] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Revolving credit facility Revolving Credit Facility [Member] Schedule of Unrecognized Compensation Expense Share-based Payment Arrangement, Nonvested Award, Cost [Table Text Block] Significant Accounting Policies Significant Accounting Policies [Text Block] Accounts Payable and Accrued Liabilities Accounts Payable and Accrued Liabilities [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. Measurement Frequency [Axis] Measurement Frequency [Axis] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Activity Related to the Company's Leases Lease, Cost [Table Text Block] Deferred IPO and Follow-On Offering Costs Deferred Charges, Policy [Policy Text Block] Subsequent Event [Line Items] Subsequent Event [Line Items] 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. Non-controlling interest Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Percent Geographical [Axis] Geographical [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 Diluted (in dollars per share) Earnings per share - Diluted (in dollars per share) Earnings Per Share, Diluted NFI Acquisition NFI Acquisition [Member] NFI Acquisition State Jurisdiction State Jurisdiction [Member] State Jurisdiction Total liabilities measured at fair value Financial Liabilities Fair Value Disclosure Income taxes paid, net of refunds Income Taxes Paid, Net Forfeitures and adjustments (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures And Adjustments, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures And Adjustments, Weighted Average Grant Date Fair Value International Non-US [Member] Subsequent Events Subsequent Events [Text Block] Comprehensive income attributable to Tradeweb Markets Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Intangible assets, net of accumulated amortization Intangible Assets, Net (Excluding Goodwill) Deferred revenue Deferred revenue balance - beginning of period Deferred revenue balance - end of period Contract with Customer, Liability Fixed Fixed-price Contract [Member] Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Deferred revenue billed in the current period Contract With Customer Liability, New Billings Amount of deferred revenue recognized for new billing arising during the current reporting period. Deferred tax liability Deferred Income Tax Liabilities, Net Related Party Transactions Related Party Transaction [Line Items] Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Activities related to the follow-on offering and other exchanges of LLC Interests, net of offering costs and cancellations (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Summary of Outstanding RSUs Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Class C and Class D Common Stock Class C and Class D Common Stock [Member] Class C and Class D Common Stock Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Reconciliation of the Statutory Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Adjustment in customer relationships Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles 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 Rate change Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent 2024 2024 Finite-Lived Intangible Asset, Expected Amortization, Year Three Accumulated amortization Capitalized Computer Software, Accumulated Amortization Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Foreign Foreign Tax Authority [Member] Business Combinations Business Combinations Policy [Policy Text Block] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Other assets Other Assets Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Accounts payable, accrued expenses and other liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Establishment of liabilities under Tax Receivable Agreement Liabilities Assumed Total LLC Interests outstanding (in shares) Minority Interest Total Number Of Interests The total number of shares of the subsidiary. Derivative [Table] Derivative [Table] Members' capital beginning of period Members' capital end of period Members' Equity Revenues Revenue: Revenues [Abstract] 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. Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Document Period End Date Document Period End Date Class B Common Stock Common Class B [Member] Number of reporting units Number of Reporting Units Entity Central Index Key Entity Central Index Key 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. Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Research and Development [Abstract] Total Fair Value Fair Value, Inputs, Level 1, 2 and 3 [Member] Accounts payable, accrued expenses and other liabilities Accounts Payable, Accrued Expenses and Other Liabilities Related Parties Accounts Payable, Accrued Expenses and Other Liabilities Related Parties Consolidated Entities [Domain] Consolidated Entities [Domain] Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] State and local income taxes, net of federal income tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent State and local Deferred State and Local Income Tax Expense (Benefit) October 2019 Follow-On Offering October Two Thousand Nineteen Follow On Offering [Member] October Two Thousand Nineteen Follow On Offering General and administrative Other General and Administrative Expense Revolving credit facility, term Debt Instrument, Term Income Statement Location [Domain] Income Statement Location [Domain] Decrease in prior year tax positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Customer Relationships Customer Relationships [Member] Common Class Pc Shares Common Class Pc Shares [Member] Common Class Pc Shares Commitments and Contingencies Loss Contingencies [Line Items] Furniture, equipment, purchased software and leasehold improvements, net of accumulated depreciation and amortization Property, Plant and Equipment, Net Refinitiv 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. Equity-settled PRSUs Equity Settled Performance Based Restricted Stock Units [Member] Equity Settled Performance Based Restricted Stock Units [Member] Software development costs Capitalized Computer Software, Gross Common stock repurchased (in shares) Treasury Stock, Shares, Acquired Estimated Annual Future Amortization for Existing Intangible Assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Tax receivable agreement liability Tax Receivable Agreement Liability The carrying amount as on the balance sheet date of tax receivable agreement liability. Trading Symbol Trading Symbol Earnings per share: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Noncontrolling Interest [Table] Noncontrolling Interest [Table] Foreign currency translation adjustments attributable to Tradeweb Markets Inc. Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Accounts receivable, allowance for credit losses Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss Regulatory Capital Regulatory Capital Regulatory capital as calculated for each entity under applicable regulations. Other assets Increase (Decrease) in Other Operating Assets Foreign currency forward contracts Foreign Exchange Contract [Member] Consulting service fee for IPO Consulting Service Fee for IPO The amount of consulting service incurred for IPO. Options outstanding at beginning of period (in dollars per share) Options outstanding at end of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Revenue recognized that was previously deferred Contract With Customer, Liability, Revenue Recognized Including New Billings Contract With Customer, Liability, Revenue Recognized Including New Billings Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Weighted Average Exercise Price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price Compensation expense Options compensation expense Total stock-based compensation expense Share-based Payment Arrangement, Expense Award, options, exercisable, weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Entity Current Reporting Status Entity Current Reporting Status Net Income Per Share Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Regulatory Capital Requirements Regulatory Capital Requirements [Text Block] The entire disclosure of capital requirements and required financial resources under applicable regulations. Weighted Average Grant-Date Fair Value Weighted Average Grant-Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Ownership percentage, continuing LLC Owners Number of LLC Interests held by non-controlling interests Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Entities [Table] Entities [Table] Employee compensation and benefits Employee compensation and benefits Labor and Related Expense Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Receivable from and Payable to Brokers and Dealers and Clearing Organizations Industry Specific Policies, Broker Dealer [Policy Text Block] Class A Common Stock Common Class A [Member] Beginning of period End of period Cash, cash equivalents and restricted cash shown in the statement of cash flows Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Schedule of Derivative Values Schedule of Derivative Instruments [Table Text Block] Dividends Dividends U.S. UNITED STATES Shares issued to underwriters (in shares) Sale of Stock, Number of Shares Issued in Transaction Common stock, par value (in dollars per share) Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Equity Incentive Plan Equity Incentive Plan [Member] Represents information about equity incentive plan. Cost Finite-Lived Intangible Assets, Gross Leases [Abstract] Adjustment in accounts receivable Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Receivable Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Receivable Intangible Assets That are Subject to Amortization Schedule of Finite-Lived Intangible Assets [Table Text Block] Income Tax Income Tax, Policy [Policy Text Block] LIBOR London Interbank Offered Rate (LIBOR) [Member] Intangible assets amortization period (in years) Finite-Lived Intangible Assets, Remaining Amortization Period Intangible Assets Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Increase (decrease) in operating liabilities: Increase (Decrease) in Operating Liabilities [Abstract] Schedule of Equity-Settled PRSUs Issued Schedule of Nonvested Performance-based Units Activity [Table Text Block] Cash equivalents – Money market funds Cash and Cash Equivalents, Fair Value Disclosure Entity Address, Postal Zip Code Entity Address, Postal Zip Code Underlying Asset Class [Domain] Underlying Asset Class [Domain] Restricted Cash Restricted Assets Disclosure [Text Block] Exercises (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Revenue Recognition Revenue from Contract with Customer [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 Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax Regulatory Capital Requirement Regulatory Capital Requirement Amount of regulatory capital required to be maintained for each entity under applicable regulations. Over-Allotment Option Over-Allotment Option [Member] Income Taxes Income Tax Disclosure [Text Block] Regulatory Capital Requirements Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Related Party [Domain] Related Party [Domain] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Schedule of Options Issued Share-based Payment Arrangement, Option, Activity [Table Text Block] Spread Debt Instrument, Basis Spread on Variable Rate Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Components of Software Development Costs Schedule Of Capitalized Computer Software [Table Text Block] Schedule Of Capitalized Computer Software Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] 2026 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Five Investment in partnership Deferred Tax Assets, Investments Equity Members' Equity [Abstract] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Auditor Firm ID Auditor Firm ID Schedule of Affiliates were Included in the Consolidated Statements of Income Schedule Of Related Party Transactions Affiliates [Table Text Block] Schedule Of Related Party Transactions Affiliates. Class of Stock [Line Items] Class of Stock [Line Items] Occupancy Occupancy, Net Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Intangible assets with indefinite useful lives Indefinite-lived Intangible Assets [Line Items] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Entity Address, Address Line One Entity Address, Address Line One Tax liability Accrued Income Taxes Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Revenues Disaggregation of Revenue [Abstract] Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Vests (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Pushdown Accounting Consolidation, Policy [Policy Text Block] Entity Shell Company Entity Shell Company Comprehensive income - Non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest [Abstract] Weighted Average Expected Life (years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Payroll taxes paid for stock-based compensation Payment, Tax Withholding, Share-based Payment Arrangement Class of Stock [Domain] Class of Stock [Domain] Stock-based compensation expense under the Option Plan APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition Required Financial Resources Futures Commission Merchant, Commodity Exchange Act, Required Net Capital Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] Foreign currency forward contracts – Gross notional amount Foreign Exchange Forward [Member] 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. Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Other assets – Memberships in clearing organizations Receivables from Clearing Organizations Cash equivalents – Money market funds Money Market Funds [Member] Loss Contingencies [Table] Loss Contingencies [Table] Cash and cash equivalents Less: Cash acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Business Segment and Geographic Information Segment Reporting Information [Line Items] Ownership [Domain] Ownership [Domain] Current Fiscal Year End Date Current Fiscal Year End Date Market Data Market Data Client Sector [Member] The market data client sector. Equity Investments Without Readily Determinable Fair Values Equity Securities without Readily Determinable Fair Value [Policy Text Block] Schedule of Fair Value Measurements Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Long-lived assets Long-Lived Assets Fed Funds Effective Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Statement [Table] Statement [Table] Audit Information [Abstract] Audit Information [Abstract] Other Deferred Tax Assets, Other Goodwill and Intangibles Deferred Tax Liabilities, Goodwill Net transfers (to) from non-controlling interests Transfers From (To) Noncontrolling Interests Amount of net transfers from (to) non controlling interest. Penalties accrued Income Tax Examination, Penalties Accrued Total unrecognized compensation cost Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Statistical Measurement [Axis] Statistical Measurement [Axis] Capitalized software development costs Payments for Software Institutional Institutional Client Sector [Member] The institutional client sector. Subsequent Event Subsequent Event [Member] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table] Receivable from/payable to brokers and dealers and clearing organizations, net Increase (Decrease) in Receivables from Brokers-Dealers and Clearing Organizations Shares issued to underwriters (in shares) Stockholders' Equity Note [Abstract] Other - See Note 14 Noncash Financing Activities, Other Noncash Financing Activities, Other Expired (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expired, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options Expired, Weighted Average Grant Date Fair Value Net Carrying Amount Finite-Lived Intangible Assets, Net Goodwill Balance at beginning of period Balance at end of period Goodwill Non-controlling interests Stockholders' Equity Attributable to Noncontrolling Interest Retail Retail Client Sector [Member] The retail client sector. Foreign tax rate differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Public Investors Public Investors [Member] This member stands for public investors, collectively. Deposits with clearing organizations Deposits with clearing organizations Deposits with Clearing Organizations and Others, Securities Licenses License [Member] Content and data Media Content [Member] Foreign Current Foreign Tax Expense (Benefit) Schedule of Goodwill Schedule of Goodwill [Table Text Block] Amortization of pushdown accounting allocation Amortization Period Pushdown Accounting Adjustment Amortization period for pushdown accounting adjustments. Subsequent Event Type [Axis] Subsequent Event Type [Axis] Cash and restricted cash Restricted Cash and Cash Equivalents, Fair Value Disclosure Restricted Cash and Cash Equivalents, Fair Value Disclosure Operating lease expense included as a component of occupancy expense on the accompanying consolidated statements of income Operating Lease, Cost Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Related Party Transactions Related Party Transactions Disclosure [Text Block] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Tax Receivable Agreement - Interest Deferred Tax Assets Tax Receivable Agreement Deferred Tax Assets Tax Receivable Agreement Deferred revenue acquired in connection with the NFI Acquisition Contract with Customer, Liability, Increase (Decrease) for Contract Acquired in Business Combination Deferred taxes Total deferred tax expense Deferred Income Tax Expense (Benefit) Employee equity compensation payable Equity Compensation Payable Equity compensation payable to employees. 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] Continuing L L C Owners Continuing L L C Owners [Member] Continuing L L C Owners Common Class P1c Shares Common Class P1c Shares [Member] Common Class P1c Shares