Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] DW SEF Dw Sef Llc [Member] DW SEF LLC (DW SEF) is a swap execution facility regulated by the Commodities Future Trading Commission. Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Net income attributable to outstanding shares of Class A and Class B common stock - Diluted Net Income (Loss) Available to Common Stockholders, Diluted Document Fiscal Year Focus Document Fiscal Year Focus Deferred tax asset as a result of transferable tax credit purchase Increase (Decrease) In Deferred Tax Assets Increase (Decrease) In Deferred Tax Assets TDIFC Tradeweb Limited [Member] TDIFC Adjusted For Refinitiv Transaction Adjusted For Refinitiv Transaction [Member] Reflects a new basis of accounting resulting from the Refinitiv transaction. Adjustment to Compensation, Amount Adjustment to Compensation Amount 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 Customer [Axis] Customer [Axis] Segment Reporting [Abstract] Segment Reporting [Abstract] ICD Acquisition ICD [Member] ICD Common stock, value Common Stock, Value, Issued 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Payroll taxes paid for stock-based compensation Payment, Tax Withholding, Share-Based Payment Arrangement Restatement Determination Date Restatement Determination Date Schedule of Financial Resources and Liquid Financial Resources Futures Commission Merchant, Minimum Financial Requirement [Table Text Block] Accrued compensation Employee-related Liabilities Required Liquid Financial Assets Required Liquid Financial Assets Amount of liquid financial assets required to be maintained under the Commodity Exchange Act. Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Derivative Instrument [Axis] Derivative Instrument [Axis] Less: Distributed and undistributed earnings allocated to participating securities Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Measurement Frequency [Axis] Measurement Frequency [Axis] Accounts receivable, allowance for credit losses Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss Contract with Customer, Basis of Pricing [Domain] Contract with Customer, Basis of Pricing [Domain] 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 Equity securities without readily determinable fair value, downward price adjustment, annual amount Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Excess Regulatory Capital Excess Regulatory Capital Amount by which the entity's regulatory capital (as defined) exceeds the requirement. Loss Contingencies [Table] Loss Contingencies [Table] Reportable Segment Reportable Segment [Member] Reportable Segment Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] 2026 Share Repurchase Program 2026 Share Repurchase Program [Member] 2026 Share Repurchase Program 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. 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] 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 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 PEO Total Compensation Amount PEO Total Compensation Amount Foreign currency translation adjustments, with no tax benefit for each of the three and nine months ended September 30, 2026 and 2025 Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Assets Assets, Fair Value Disclosure [Abstract] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] 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 Retail Retail Client Sector [Member] The retail client sector. Foreign currency forward contracts – Gross notional amount Derivative, Notional Amount Share Repurchase Program [Domain] Share Repurchase Program [Domain] 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 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 Schedule of Balances from Transactions with Affiliates Included in the Consolidated Statements Schedule of Related Party Transactions [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Commitments and Contingencies Loss Contingencies [Line Items] Software Development Costs Software, Internal-Use [Policy Text Block] Number of reportable segments Number of Reportable Segments 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. 2030 Lessee, Operating Lease, Liability, to be Paid, Year Four Crypto Asset [Domain] Crypto Asset [Domain] Other Other Other Financial Service, Other [Member] Schedule of Derivative Values Schedule of Derivative Instruments [Table Text Block] 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. Deferred revenue Increase (Decrease) in Deferred Revenue Tax Receivable Agreement Tax Receivable Agreement No definition available. Concentration Risk [Table] Concentration Risk [Table] Entity Address, City or Town Entity Address, City or Town 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. Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 2021 Share Repurchase Program 2021 Share Repurchase Program [Member] 2021 Share Repurchase Program Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Title of Individual [Domain] Title and Position [Domain] Schedule of PSUs Granted, Valuation Assumptions Schedule of Share-Based Payment Award, PSUs Granted, Valuation Assumptions [Table Text Block] Schedule of Share-Based Payment Award, PSUs Granted, Valuation Assumptions Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Class of Stock [Axis] Class of Stock [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 Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Net income attributable to outstanding shares of Class A and Class B common stock - Basic Net Income (Loss) Available to Common Stockholders, Basic Dividends Payments of Ordinary Dividends Reconciliation of cash, cash equivalents and restricted cash Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Significant Observable Inputs (Level 2)  Significant Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Accumulated amortization Intangible Asset, Finite-Lived, Accumulated Amortization Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Other comprehensive income (loss), net of tax Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] U.S. UNITED STATES Securities Sold Under Agreements to Repurchase Repurchase and Resale Agreements Policy [Policy Text Block] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Stock-based compensation expense capitalized Share-Based Payment Arrangement, Amount Capitalized ICDLT Institutional Cash Distributors Limited [Member] Institutional Cash Distributors Limited Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Furniture, equipment, software and leasehold improvement additions included in accounts payable Capital Expenditures Incurred but Not yet Paid Grantee Status [Axis] Grantee Status [Axis] Schedule of Information Regarding Revenue by Client Sector Segment Reporting [Table Text Block] Non- Controlling Interests Noncontrolling Interest [Member] Use of Estimates Use of Estimates, Policy [Policy Text Block] Related Party [Axis] Related and Nonrelated Parties [Axis] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Banking Regulation, Regulatory Capital Requirement, Compliance [Table] Cumulative unrealized gains on minority equity investments held Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Cumulative Amount Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Other Equity Investments Equity Securities without Readily Determinable Fair Value [Policy Text Block] Non-Controlling Interests Noncontrolling Interest Disclosure [Text Block] Receivable and due from related parties/payable and due to related parties, net Increase (Decrease) Due from Affiliates Variable Variable Pricing [Member] Contract with customer in which amount of consideration is based on variable components such as transaction based fees. Schedule of Maturity of Lease Liabilities and Future Minimum Lease Payments Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Document Period End Date Document Period End Date Payments on tax receivable agreement liability Payments on Tax Receivable Agreement, Liability Payments on Tax Receivable Agreement, Liability Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding 2028 Lessee, Operating Lease, Liability, to be Paid, Year Two Security Exchange Name Security Exchange Name Revolving credit facility, term Debt Instrument, Term Total Fair Value Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Expected purchase price of acquisition Business Combination, Price of Acquisition, Expected Unrealized gain on available-for-sale debt security, tax expense OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Impaired Investment Two Impaired Investment Two [Member] Impaired Investment Two Receivable from and Payable to Brokers and Dealers and Clearing Organizations Industry-Specific Policies, Broker-Dealer [Policy Text Block] Impairments recorded on equity method investments Equity Method Investment, Other-than-Temporary Impairment Total Liabilities, Fair Value Disclosure Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Class B Common Stock Common Class B [Member] Number of shares authorized (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Total LLC Interests outstanding (in shares) Minority Interest Total Number Of Interests The total number of shares of the subsidiary. Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Reclassification adjustment for gain on available-for-sale debt security, tax expense Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Earnings per share attributable to Tradeweb Markets Inc. Class A and B common stockholders: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Total LLC Interests outstanding Minority Interest Total Ownership Percentage The total ownership interest on noncontrolling interest expressed as a percentage. Digital Assets and Other Investments at Fair Value Crypto Asset, Policy [Policy Text Block] Crypto Asset, Policy 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. Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total liabilities Liabilities Trading Symbol Trading Symbol Equity investment impairment Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount Measurement Input, Discount Rate Measurement Input, Discount Rate [Member] Effect of foreign currency exchange rate changes Contract With Customer, Liability, Foreign Currency Exchange Rate Contract With Customer, Liability, Foreign Currency Exchange Rate Geographical [Domain] Geographical [Domain] Crypto asset, unrealized gain (loss) Crypto Asset, Unrealized Gain (Loss), Nonoperating Purchases of furniture, equipment, software and leasehold improvements Payments to Acquire Property, Plant, and Equipment Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Company Selected Measure Name Company Selected Measure Name Gains (losses) included in other comprehensive income (loss) 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) Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Impaired Investment Three Impaired Investment Three [Member] Impaired Investment Three 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. Concentration Risk [Line Items] Concentration Risk [Line Items] Non-cash investing and financing activities Noncash Investing and Financing Items [Abstract] 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 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] Number of investment providers Number Of Investment Providers Number Of Investment Providers Commitment fee, percentage Line of Credit Facility, Commitment Fee Percentage Debt Securities Debt Securities [Member] Credit Facility [Domain] Credit Facility [Domain] Asset Class [Domain] Asset Class [Domain] Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Related Party Transactions [Abstract] Related Party Transactions [Abstract] Cash flows from operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Interest income Investment Income, Interest and Dividend Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] TW SEF Tw Sef Llc [Member] TW SEF LLC (TW SEF) is a swap execution facility regulated by the Commodities Future Trading Commission. Other assets – Memberships in clearing organizations Receivables from Clearing Organizations 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 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. Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Credit Risk Allowance for Credit Losses [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Related Party Transactions Related Party Transaction [Line Items] Useful life Property, Plant, and Equipment, Useful Life 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 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 Security 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 Award Timing Predetermined Award Timing Predetermined [Flag] Additional adjustment Debt Instrument, Adjustment In Addition To Credit Adjustment Spread Debt Instrument, Adjustment In Addition To Credit Adjustment Spread 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 Business combination agreement, maximum extension period Business Combination Agreement, Maximum Extension Period Business Combination Agreement, Maximum Extension Period 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] 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 Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Depreciation expense Depreciation Scenario [Domain] Scenario [Domain] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Digital Asset Loan Receivable Digital Asset Loan Receivable [Member] Digital Asset Loan Receivable 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 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] Non-Controlling Interests Noncontrolling Interest [Line Items] Cost Basis Crypto Asset, Cost 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] Number of share owned (in shares) Number Of Share Owned Number of share owned. Schedule of Breakdown of Revenues Between Fixed and Variable Revenues Disaggregation of Revenue [Table Text Block] Liabilities Liabilities [Abstract] Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Weighted average shares outstanding: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] TWD Tradeweb Direct Llc [Member] Tradeweb Direct LLC (TWD) is a registered broker-dealer under the Securities Exchange Act of 1934, and a member of the Financial Industry Regulatory Authority. Income Statement Location [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] LLC Interests Limited Liability Company Units [Member] Limited Liability Company Units 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] Deposits with Clearing Organizations Deposits With Clearing Organizations [Policy Text Block] Disclosure of accounting policy for deposits with clearing organizations. Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] 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 Business combination, termination fee obligation Business Combination Agreement, Termination Fee Obligation Business Combination Agreement, Termination Fee Obligation 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 Measurement Input, Perpetual Growth Rate Measurement Input, Perpetual Growth Rate [Member] Measurement Input, Perpetual Growth Rate 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] 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 Scenario [Axis] Scenario [Axis] Conversion ratio Noncontrolling Interest, Conversion Ratio The conversion ratio of shares of non-controlling interests. Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] 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 Market Data Market Data Client Sector [Member] The market data client sector. Digital asset loan receivable Loans Receivable, Fair Value Disclosure Total expenses Costs and Expenses Adoption Date Trading Arrangement Adoption Date Other Stockholders Other Stockholders [Member] Other Stockholders 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 TESBV Tradeweb Execution Services B.V. [Member] Tradeweb Execution Services B.V. Digital assets received as revenue Digital Assets Received As Revenue Digital Assets Received As Revenue 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 Number of equity interest issued (in shares) Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares 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 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] Wholesale Wholesale Client Sector [Member] The wholesale client sector. Business Combination [Domain] Business Combination [Domain] PRSUs Equity Settled Performance Based Restricted Stock Units [Member] Equity Settled Performance Based Restricted Stock Units [Member] 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 Weighted Average Weighted Average [Member] Accumulated depreciation and amortization Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization 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 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 NFI Acquisition NFI Acquisition [Member] NFI Acquisition Income Statement [Abstract] Income Statement [Abstract] 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] 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 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] Maximum performance modifier, percent Share-based Compensation Arrangement by Share-based Payment Award, Maximum Performance Modifier Share-based Compensation Arrangement by Share-based Payment Award, Maximum Performance Modifier 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] LSEG LSEG [Member] LSEG Number of shares received upon debt conversion (in shares) Equity Securities, FV-NI, Number Of Shares Received Upon Conversion Equity Securities, FV-NI, Number Of Shares Received Upon Conversion Equity interests issued and issuable Business Combination, Consideration Transferred, Equity Interest Statement [Line Items] Statement [Line Items] Total assets Assets Entity [Domain] Entity [Domain] Accounts receivable, net of allowance for credit losses of $113 and $587 at September 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. 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. Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Stock-Based Compensation Share-Based Payment Arrangement [Policy Text Block] iAltaA Capital Markets, LLC iAltaA Capital Markets, LLC [Member] iAltaA Capital Markets, LLC 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. Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Four Lessee, Operating Lease, Liability, to be Paid, after Year Four Interest expense Interest Expense, Nonoperating Schedule of Total Stock-based Compensation Expense Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Unfunded capital commitment Equity Securities, Unfunded Capital Commitment Equity Securities, Unfunded Capital Commitment Equity investment without readily determinable fair values Equity Securities without Readily Determinable Fair Value, Amount 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] Tradeweb Markets Inc Tradeweb Markets Inc [Member] Tradeweb Markets Inc., the reporting entity. 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 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] Liquid Financial Assets Liquid Financial Assets Liquid financial assets calculated under the Commodity Exchange Act. Retained Earnings Retained Earnings [Member] Revolving credit facility Revolving Credit Facility [Member] AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] 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] Unrealized gain on available-for-sale debt security, net of tax expense of $0, $1,521, $3,268 and $2,320 for the three and nine months ended September 30, 2026 and 2025, respectively OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax 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] Subscription fees Subscription fees Subscription Fee Revenue [Member] Subscription fee revenue from granting access to institutional investors to the entity's electronic marketplaces. Intangible Assets Intangible Asset, Finite-Lived [Line Items] Ownership [Domain] Ownership [Domain] Broker-Dealer [Abstract] R8Fin R8Fin [Member] R8Fin 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 TESL Tradeweb Execution Services Limited [Member] Tradeweb Execution Services Limited Schedule of Outstanding Shares of Common Stock Schedule of Stockholders Equity [Table Text Block] Crypto asset, sale, number of units Crypto Asset, Sale, Number of Units Crypto Asset, Sale, Number of Units Regulatory Capital Requirement Regulatory Capital Requirement Amount of regulatory capital required to be maintained for each entity under applicable regulations. Yieldbroker Acquisition Yieldbroker Acquisition [Member] Yieldbroker Acquisition Revenue recognized Contract With Customer, Liability, Revenue Recognized Including New Billings Contract With Customer, Liability, Revenue Recognized Including New Billings 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 Public Investors Public Investors [Member] This member stands for public investors, collectively. Revenue Revenue from Contract with Customer [Text Block] Issuance of common stock from equity incentive plans Stock Issued During Period, Value, New Issues Corporates Corporate Client Sector [Member] Corporate Client Sector Dispositions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Other Share Repurchases Program Other Share Repurchases Program [Member] Other Share Repurchases Program One Month SOFR One Month Secured Overnight Financing Rate [Member] One Month Secured Overnight Financing Rate Segment Reporting [Table] Segment Reporting [Table] Excise tax associated with share repurchases Share Repurchase Program, Excise Tax 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. Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Title of Individual [Axis] Title and Position [Axis] Investments in Equity Securities with a 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) Net transfers (to) from non-controlling interests Transfers From (To) Noncontrolling Interests Amount of net transfers from (to) non controlling interest. 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] Tax receivable agreement liability adjustment Tax Receivable Agreement Liability, Adjustment Tax Receivable Agreement Liability, Adjustment Amortization of pushdown accounting allocation Amortization Period Pushdown Accounting Adjustment Amortization period for pushdown accounting adjustments. Distributions to non-controlling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Recovery of Erroneously Awarded Compensation Disclosure [Line Items] YB Yieldbroker [Member] Yieldbroker 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 Entity Information [Line Items] Entity Information [Line Items] Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Axis] Impaired Investment One Impaired Investment One [Member] Impaired Investment One 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] 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. 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 Foreign currency forward contracts not designated in accounting hedge relationship – General and administrative (expenses)/income Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Less: Reclassification adjustment for gain on available-for-sale debt security, included in net income, net of tax expense of $6,655 for both the three and nine months ended September 30, 2026 Unrealized gains on reclassification from other comprehensive income (loss) to other income (loss) Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Entity Small Business Entity Small Business Comprehensive income attributable to Tradeweb Markets Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Business combination, exchange ratio Business Combination, Exchange Ratio Business Combination, Exchange Ratio 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] Voting power percentage Voting power percentage Voting power percentage. 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] Contractual term Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period 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] 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] 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. Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Stock repurchase program, remaining authorized repurchase amount Share Repurchase Program, Remaining Authorized, Amount Arrangement Duration Trading Arrangement Duration Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number 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. Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Change in Contract with Customer Change In Contract with Customer, Liability [Roll Forward] Change In Contract with Customer, Liability (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] Institutional Institutional Client Sector [Member] The institutional client sector. Equity pickup loss Income (Loss) from Equity Method Investments Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] 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] TWM LLC TWM LLC [Member] TWM LLC 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] Business Combinations Business Combination [Policy Text Block] Vesting period 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] Regulatory Capital Requirements Regulatory Capital Requirements [Text Block] The entire disclosure of capital requirements and required financial resources under applicable regulations. 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] TAPL Tradeweb Asia Pte. Ltd. [Member] Tradeweb Asia Pte. Ltd. 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 Tax receivable agreement, payment term Tax Receivable Agreement, Term Tax Receivable Agreement, Term Geographical [Axis] Geographical [Axis] TWSA Tradeweb Saudi Arabia [Member] Tradeweb Saudi Arabia Crypto asset, loan receivable Crypto Asset, Loan Receivable Crypto Asset, Loan Receivable Restricted cash Restricted cash Restricted cash Restricted Cash Deferred revenue Deferred revenue balance - beginning of period Deferred revenue balance - ending of period Deferred revenue Contract with Customer, Liability Accordion feature Line of Credit Facility, Accordion Feature, Increase Limit Line of Credit Facility, Accordion Feature, Increase Limit Other segment items Segment Reporting, Other Segment Item, Amount Other assets Other assets Other Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Debt instrument floor rate Debt Instrument Floor Rate The Percentage of floor rate under debt instrument. 2022 Share Repurchase Program 2022 Share Repurchase Program [Member] 2022 Share Repurchase Program Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Tax Receivable Agreement Tax Receivable Agreement Liability Disclosure [Text Block] The entire disclosure of tax receivable agreement liability. 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 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] 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] Business combination, payments Payments to Acquire Businesses, Gross 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 Other Equity Investments Other Equity Investments [Member] Other Equity Investments Employee compensation and benefits Employee compensation and benefits Labor and Related Expense 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] Tradeweb Markets LLC Tradeweb Markets LLC [Member] Tradeweb Markets LLC. Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Retained earnings Retained Earnings (Accumulated Deficit) 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] Cash and restricted cash Restricted Cash and Cash Equivalents, Fair Value Disclosure Restricted Cash and Cash Equivalents, Fair Value Disclosure Securitize, Inc. Securitize, Inc. [Member] Securitize, Inc. Number of reporting units Goodwill, Reporting Unit, Number Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Investment in available for sale debt securities Debt Securities, Available-for-Sale 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] Software development costs, net of accumulated amortization Intangible Asse, Finite-Lived, Software Development Costs, Net Intangible Asse, Finite-Lived, Software Development Costs, Net New billings Contract With Customer Liability, New Billings Amount of deferred revenue recognized for new billing arising during the current reporting period. Additional number of shares receivable upon contingent right (in shares) Equity Securities, FV-NI, Additional Number Of Shares Receivable Upon Contingent Right Equity Securities, FV-NI, Additional Number Of Shares Receivable Upon Contingent Right Unrealized gains Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount Derivative Contract [Domain] Derivative Contract [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Total liabilities and equity Liabilities and Equity 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 Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Options Share-Based Payment Arrangement, Option [Member] 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] Non-controlling interests Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] EURIBOR EURIBOR [Member] EURIBOR Asset Class [Axis] Asset Class [Axis] Related Party [Domain] Related and Nonrelated Parties [Domain] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Schedule of the Impact on Equity Due to Changes in the 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. 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 ICDLC Institutional Cash Distributors [Member] Institutional Cash Distributors 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 Cash received from sale of digital assets Proceeds from Disposal, Crypto Asset Crypto Asset [Axis] Crypto Asset [Axis] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized 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. Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Adjustments to non-controlling interests Minority Interest, Increase (Decrease) From Adjustments Amount of increase (decrease) in noncontrolling interest from adjustments. Preferred stock, $0.00001 par value; 250,000,000 shares authorized; none issued or outstanding Preferred Stock, Value, Issued Tax receivable agreement liability Tax receivable agreement liability Tax Receivable Agreement Liability The carrying amount as on the balance sheet date of tax receivable agreement liability. 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 Class of warrant or right, exercised (in shares) Class of Warrant or Right, Exercised Class of Warrant or Right, Exercised Hedging Designation [Domain] Hedging Designation [Domain] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Class of Stock [Domain] Class of Stock [Domain] 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] Regulatory Capital Regulatory Capital Regulatory capital as calculated for each entity under applicable regulations. 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. Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total assets measured at fair value Assets, Fair Value Disclosure Canton Coins Canton Coins [Member] Canton Coins RSUs and RSAs Restricted Stock Units and Restricted Stock [Member] Restricted Stock Units and Restricted Stock 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 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) Credit adjustment spread Debt Instrument, Credit Adjustment Spread Debt Instrument, Credit Adjustment Spread Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional Paid-In Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Equity securities received upon conversion of receivables Equity Securities Received Upon Conversion of Receivables Equity Securities Received Upon Conversion of Receivables Impairment of goodwill Goodwill, Impairment Loss Restricted Cash Restricted Assets Disclosure [Text Block] Name Trading Arrangement, Individual Name MAXEX, LLC MAXEX, LLC [Member] MAXEX, LLC Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Intangible assets excluding internally developed software Intangible Assets Excluding Internally Developed Software [Member] Intangible Assets Excluding Internally Developed Software 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] Equity securities, unrealized gain Equity Securities, FV-NI, Unrealized Gain (Loss) 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 Contingent consideration earnout period Equity Securities, FV-NI, Contingent Consideration Earnout Period Equity Securities, FV-NI, Contingent Consideration Earnout Period 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 Leasehold improvements obtained in exchange for lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Provision for income taxes Tax expense Income Tax Expense (Benefit) Realized and unrealized (loss) gain Gain (Loss), Foreign Currency Transaction, before Tax General and administrative Other General and Administrative Expense, Net Of Reclassification Other General and Administrative Expense, Net Of Reclassification 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] 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 Forecast Forecast [Member] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Numerator: Net Income (Loss) Attributable to Parent [Abstract] 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. 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] Restatement Determination Date: Restatement Determination Date [Axis] Proceeds from stock-based compensation exercises Proceeds from Stock Options Exercised 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. Awards Granted to Non-employee Share-Based Payment Arrangement, Nonemployee [Member] Trumid Holdings, LLC Trumid Holdings, LLC [Member] Trumid Holdings, LLC Pre-Funded Warrants Pre-Funded Warrants [Member] Pre-Funded Warrants Leases Lessee, Leases [Policy Text Block] Schedule of Recognized Revenue and Remaining Deferred Revenue Balance Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Fed Funds Effective Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Business combination, threshold trading days Business Combination, Threshold Trading Days Business Combination, Threshold Trading Days Revenues Revenue: Revenues [Abstract] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]