DW SEF Dw Sef Llc [Member] DW SEF LLC (DW SEF) is a swap execution facility regulated by the Commodities Future Trading Commission. Consolidated Entities [Axis] Consolidated Entities [Axis] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Variable Rate [Domain] Variable Rate [Domain] Less: Net income attributable to non-controlling interests Less: Net income attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest 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 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. Deferred Offering Costs Deferred Charges, Policy [Policy Text Block] Pay vs Performance Disclosure [Line Items] Statistical Measurement [Domain] Statistical Measurement [Domain] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Underlying Security Market Price Change Underlying Security Market Price Change, Percent Related Party Transactions Related Party Transaction [Line Items] Income Tax Disclosure [Table] Income Tax Disclosure [Table] Disclosure of information pertaining to income taxes. Cash and cash equivalents Less: Cash acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Award Type [Domain] Award Type [Domain] Fair Value as of Grant Date Award Grant Date Fair Value Wholesale Wholesale Client Sector [Member] The wholesale client sector. Allowance for Credit Losses Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block] Schedule of Preliminary Purchase Price Allocated Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Unsettled share repurchases included in other liabilities Unsettled Share Repurchases Included In Other Liabilities Unsettled Share Repurchases Included In Other Liabilities 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] Revolving credit facility Revolving Credit Facility [Member] TW SEF Tw Sef Llc [Member] TW SEF LLC (TW SEF) is a swap execution facility regulated by the Commodities Future Trading Commission. Deferred tax liability Deferred Income Tax Liabilities, Net MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Foreign Exchange Option Foreign currency call option contract not designated in accounting hedge relationship – Other income/(loss) (1) Foreign Exchange Option [Member] Segment Reporting [Abstract] Segment Reporting [Abstract] Accounts payable, accrued expenses and other liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Restatement Determination Date: Restatement Determination Date [Axis] Foreign currency translation adjustment, tax benefit Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax EURIBOR EURIBOR [Member] EURIBOR Debt instrument floor rate Debt Instrument Floor Rate The Percentage of floor rate under debt instrument. Commitments and contingencies (Note 13) Commitments and Contingencies Insider Trading Policies and Procedures [Line Items] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] 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. Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Tax receivable agreement liability adjustment Tax Receivable Agreement Liability, Adjustment Tax Receivable Agreement Liability, Adjustment Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] 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] Geographical [Axis] Geographical [Axis] Income Taxes Income Tax Disclosure [Text Block] Ownership [Axis] Ownership [Axis] Non-employee director Director [Member] Leases Lessee, Leases [Policy Text Block] Equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Noncontrolling Interest [Abstract] Noncontrolling Interest [Abstract] Customer [Axis] Customer [Axis] Noncontrolling Interest [Table] Noncontrolling Interest [Table] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, $0.00001 par value; 250,000,000 shares authorized; none issued or outstanding Preferred Stock, Value, Issued General and administrative Other General and Administrative Expense, Net Of Reclassification Other General and Administrative Expense, Net Of Reclassification Business Acquisition [Line Items] Business Acquisition [Line Items] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] 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. Diluted (in dollars per share) Earnings per share - Diluted (in dollars per share) Earnings Per Share, Diluted PEO Total Compensation Amount PEO Total Compensation Amount Stock-based compensation expense APIC, Share-Based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Intangible Assets Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Significant Unobservable Inputs (Level 3) Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Technology and communications Technology and communications Communications and Information Technology Share-based payment arrangement, accelerated cost Share-Based Payment Arrangement, Accelerated Cost Trading Symbol Trading Symbol Letters of credit outstanding Letters of Credit Outstanding, Amount Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Net income attributable to Tradeweb Markets Inc. Net income attributable to Tradeweb Markets Inc. Net income attributable to Tradeweb Markets Inc. Net Income (Loss) Attributable to Parent Net Income (Loss) Derivative Contract [Domain] Derivative Contract [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Translation of Foreign Currency and Foreign Exchange Derivative Contracts Foreign Currency Transactions and Translations Policy [Policy Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Company Selected Measure Name Company Selected Measure Name SONIA Sterling Over Night Index Average [Member] Sterling Over Night Index Average Liabilities and Equity Liabilities and Equity [Abstract] Intangible Assets Finite-Lived Intangible Assets [Line Items] Common stock, conversion ratio Common Stock Conversion Ratio Common Stock Conversion Ratio Share repurchases pursuant to share repurchase programs Stock Repurchased During Period, Value Fed Funds Effective Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Total Fair Value Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Deferred revenue Deferred revenue balance - beginning of period Deferred revenue balance - ending of period Deferred revenue Contract with Customer, Liability Refinitiv Direct Owner Refinitiv Direct Owner [Member] Refinitiv Direct Owner Schedule of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Master Data Agreement, term Master Data Agreement, Term Master Data Agreement, Term Maximum contractual term Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Executive Category: Executive Category [Axis] Class B Common Stock Common Class B [Member] 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 LLC Interests Limited Liability Company Units [Member] Limited Liability Company Units Significant Accounting Policies Significant Accounting Policies [Text Block] Quoted Prices in active Markets for Identical Assets (Level 1) Quoted Prices in active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Name Measure Name Name Forgone Recovery, Individual Name Deferred revenue acquired in connection with the Yieldbroker Acquisition Contract With Customer Liability, Deferred Revenue Acquired Contract With Customer Liability, Deferred Revenue Acquired 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 Goodwill Goodwill Equity Components [Axis] Equity Components [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Revenues Disaggregation of Revenue [Abstract] Underlying Securities Award Underlying Securities Amount Entity Small Business Entity Small Business Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Weighted average volatility rate (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Accrued compensation Employee-related Liabilities Local Phone Number Local Phone Number Accounts receivable Increase (Decrease) in Accounts Receivable Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Number of share owned (in shares) Number Of Share Owned Number of share owned. 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. 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Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] (Increase) decrease in operating assets: Increase (Decrease) in Operating Assets [Abstract] Schedule of Financial Instruments Not Measured at Fair Value Fair Value, by Balance Sheet Grouping [Table Text Block] 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] Product and Service [Domain] Product and Service [Domain] Other Performance Measure, Amount Other Performance Measure, Amount Payments on tax receivable agreement liability Payments on Tax Receivable Agreement, Liability Payments on Tax Receivable Agreement, Liability Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Deposits with Clearing Organizations Deposits With Clearing Organizations [Policy Text Block] Disclosure of accounting policy for deposits with clearing organizations. Receivable and due from affiliates – Foreign exchange derivative contracts Other Receivables [Member] Other Receivables Equity Investments Without Readily Determinable Fair Values Equity Securities without Readily Determinable Fair Value [Policy Text Block] Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] TESL Tradeweb Execution Services Limited [Member] Tradeweb Execution Services Limited Conversion ratio Noncontrolling Interest, Conversion Ratio The conversion ratio of shares of non-controlling interests. Transaction costs Business Combination, Acquisition Related Costs Antidilutive shares (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Award Type [Axis] Award Type [Axis] Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Yieldbroker YB Yieldbroker [Member] Yieldbroker Document Quarterly Report Document Quarterly Report Non-cash investing and financing activities Noncash Investing and Financing Items [Abstract] Furniture, equipment, software and leasehold improvement additions included in accounts payable Capital Expenditures Incurred but Not yet Paid Required Financial Resources Futures Commission Merchant, Commodity Exchange Act, Required Net Capital Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Hedging Designation [Axis] Hedging Designation [Axis] Number of shares authorized (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized General and Administrative Expense General and Administrative Expense [Member] Trading Arrangement: Trading Arrangement [Axis] Related Party Transactions Related Party Transactions Disclosure [Text Block] Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Reclassification [Line Items] Reclassification [Line Items] Use of Estimates Use of Estimates, Policy [Policy Text Block] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount 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. Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Entity File Number Entity File Number Loss Contingencies [Table] Loss Contingencies [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] 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. Securities Sold Under Agreements to Repurchase Repurchase and Resale Agreements Policy [Policy Text Block] Amortization expense Amortization of Intangible Assets Entity Shell Company Entity Shell Company 2026 Lessee, Operating Lease, Liability, to be Paid, Year Three Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Furniture, Equipment, Purchased Software and Leasehold Improvements Property, Plant and Equipment [Line Items] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Restatement Determination Date Restatement Determination Date Other Income (Loss) Other Operating Income (Expense) [Member] Average price per share (in dollars per share) Shares Acquired, Average Cost Per Share Award Date [Domain] Award Date [Domain] Master Data Agreement, transition term Master Data Agreement, Transition Period Master Data Agreement, Transition Period Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] 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 Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization 2025 Lessee, Operating Lease, Liability, to be Paid, Year Two Accounts payable, accrued expenses and other liabilities Accounts payable, accrued expenses and other liabilities Accounts Payable and Accrued Liabilities Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Weighted average shares outstanding: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Common stock, shares issued (in shares) Common Stock, Shares, Issued 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. Purchase price, net of cash acquired and excluding working capital and other closing adjustments Business Combination, Consideration Transferred Commitment fee, percentage Line of Credit Facility, Commitment Fee Percentage Security Exchange Name Security Exchange Name Total assets measured at fair value Assets, Fair Value Disclosure Stock-Based Compensation Share-Based Payment Arrangement [Policy Text Block] Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Vesting percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Options Employee Stock Option [Member] Restricted Cash Restricted Assets Disclosure [Text Block] Receivable from and Payable to Broker and Dealers and Clearing Organizations Industry-Specific Policies, Broker-Dealer [Policy Text Block] Dividends Payments of Ordinary Dividends Class A Common Stock Common Class A [Member] Non-Controlling Interests Noncontrolling Interest Disclosure [Text Block] Total expenses Operating expenses Costs and Expenses Maximum Maximum [Member] Comprehensive income attributable to Tradeweb Markets Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Unrecognized compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Document Type Document Type Adjustments to non-controlling interests Minority Interest Increase Decrease From Adjustments Amount of increase (decrease) in noncontrolling interest from adjustments. Schedule of Balances From Transactions with Affiliates Included in the Consolidated Statements Schedule of Related Party Transactions [Table Text Block] Tabular List, Table Tabular List [Table Text Block] Entity Address, Address Line One Entity Address, Address Line One Aggregate value of share repurchase Treasury Stock, Value, Acquired, Cost Method Subsequent Event [Table] Subsequent Event [Table] CEO Chief Executive Officer [Member] Stockholders' Equity and Stock-Based Compensation Plans Share-Based Payment Arrangement [Text Block] 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. Ownership interest Number of LLC Interests held by Tradeweb Markets Inc. Subsidiary, Ownership Percentage, Parent Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Other (income) loss, net Other Noncash Income (Expense) Excess Regulatory Capital Excess Regulatory Capital Amount by which the entity's regulatory capital (as defined) exceeds the requirement. Subscription fees Subscription Fee And Market Data Revenue [Member] Subscription fee revenue from granting access to institutional investors to the entity's electronic marketplaces and fees from the sale of market data to Refinitiv. Business Acquisition [Axis] Business Acquisition [Axis] Subsequent Event Subsequent Event [Member] Adjusted For Refinitiv Transaction Adjusted For Refinitiv Transaction [Member] Reflects a new basis of accounting resulting from the Refinitiv transaction. Performance period Share-Based Compensation Arrangement by Share-Based Payment Award, Performance Period Share-Based Compensation Arrangement by Share-Based Payment Award, Performance Period Derivative [Table] Derivative [Table] Variable Rate [Axis] Variable Rate [Axis] Accounts payable, accrued expenses and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Income Statement [Abstract] Income Statement [Abstract] Nonrecurring Adjustment [Domain] Nonrecurring Adjustment [Domain] Issuance of common stock from equity incentive plans (in shares) Stock Issued During Period, Shares, New Issues Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Axis] Title of 12(b) Security Title of 12(b) Security Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] 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. Related Party [Domain] Related Party, Type [Domain] Acquisitions Business Combination Disclosure [Text Block] Liabilities Derivative Liability Receivable from brokers and dealers and clearing organizations Receivable from brokers and dealers and clearing organizations Receivable from Broker-Dealer and Clearing Organization Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Retirement notice, term Retirement Notice, Term Retirement Notice, Term Ownership percentage, continuing LLC Owners Number of LLC Interests held by non-controlling interests Subsidiary, Ownership Percentage, Noncontrolling Owner Numerator: Net Income (Loss) Attributable to Parent [Abstract] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Establishment of liabilities under tax receivable agreement Liabilities Assumed Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Credit adjustment spread Debt Instrument, Credit Adjustment Spread Debt Instrument, Credit Adjustment Spread Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Entity Tax Identification Number Entity Tax Identification Number Financial Resources Futures Commission Merchant, Commodity Exchange Act, Adjusted Net Capital Change in Contract with Customer Change In Contract with Customer, Liability [Roll Forward] Change In Contract with Customer, Liability Stock-based compensation expense Share-Based Payment Arrangement, Amount Capitalized Statistical Measurement [Axis] Statistical Measurement [Axis] Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Entity Interactive Data Current Entity Interactive Data Current 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 Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Less: Preliminary working capital and other closing adjustments Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets 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] Total Shareholder Return Amount Total Shareholder Return Amount Share repurchases pursuant to share repurchase programs Payments for Repurchase of Common Stock Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Furniture, Equipment, Purchased Software and Leasehold Improvements Furniture Equipment And Purchased Software [Member] Furniture, equipment and purchased software. Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Equity Members' Equity [Abstract] Schedule of Outstanding Shares Of Common Stock Schedule of Stockholders Equity [Table Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Measure: Measure [Axis] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Name Outstanding Recovery, Individual Name Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Increase (decrease) in operating liabilities: Increase (Decrease) in Operating Liabilities [Abstract] Total LLC Interests outstanding Minority Interest Total Ownership Percentage The total ownership interest on noncontrolling interest expressed as a percentage. Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Axis] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Other Stockholders Other Stockholders [Member] Other Stockholders Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Excess Financial Resources Futures Commission Merchant, Commodity Exchange Act, Excess Net Capital Entity Address, State or Province Entity Address, State or Province Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Common stock, shares outstanding (in shares) Common stock beginning balance (in shares) Common stock ending balance (in shares) Common Stock, Shares, Outstanding Dividends Dividends PEO PEO [Member] Receivable and due from affiliates Receivable and due from affiliates Receivable and due from affiliates Other Receivables Reconciliation of cash, cash equivalents and restricted cash as shown on the statements of financial condition: Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Cash equivalents – Money market funds Cash Equivalents [Member] Expenses Interest Income, Securities, Operating, by Taxable Status [Abstract] Tradeweb Markets LLC Tradeweb Markets LLC [Member] Tradeweb Markets LLC. Accounts receivable, net of allowance for credit losses of $187 and $129 at September 30, 2023 and December 31, 2022, 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. Other Other Other fees Financial Service, Other [Member] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Class of Stock [Domain] Class of Stock [Domain] Customer [Domain] Customer [Domain] Net income attributable to outstanding shares of Class A and Class B common stock - Basic Net Income (Loss) Available to Common Stockholders, Basic Business Segment and Geographic Information Revenues from External Customers and Long-Lived Assets [Line Items] Professional fees Professional fees Professional Fees Liquid Financial Assets Liquid Financial Assets Liquid financial assets calculated under the Commodity Exchange Act. Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Effective tax rate Effective Income Tax Rate Reconciliation, Percent Lease liabilities Operating Lease, Liability 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 Total liabilities Liabilities Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Measurement Frequency [Domain] Measurement Frequency [Domain] All Executive Categories All Executive Categories [Member] Granted in period, fair value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Granted in Period, Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Granted in Period, Fair Value Title of Individual [Axis] Title of Individual [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Capitalized software development costs Payments for Software Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Tax liability Accrued Income Taxes Earnings per share attributable to Tradeweb Markets Inc. Class A and B common stockholders: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Subsequent Event [Line Items] Subsequent Event [Line Items] Affiliated Entity Affiliated Entity [Member] Common stock Common Stock, Value, Issued Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Shares contributed by refinitiv owner (in shares) Stock Contributed During Period Acquiree Majority Owner Stock Contributed During Period Acquiree Majority Owner Intangible assets - Tradename Trade Names [Member] 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. Required Liquid Financial Assets Required Liquid Financial Assets Amount of liquid financial assets required to be maintained under the Commodity Exchange Act. Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Yieldbroker Acquisition Yieldbroker Acquisition [Member] Yieldbroker Acquisition One Month SOFR One Month Secured Overnight Financing Rate [Member] One Month Secured Overnight Financing Rate Withholding taxes payable relating to stock-based compensation settlements included in accrued compensation Noncash Financing Activities, Taxes Payable Relating to Stock-based Compensation Settlements Noncash Financing Activities, Taxes Payable Relating to Stock-based Compensation Settlements Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Restricted cash Restricted cash Restricted cash Restricted Cash All Individuals All Individuals [Member] Awarded during 2023 Awarded During 2023 [Member] Awarded During 2023 Supplemental disclosure of cash flow information Supplemental Cash Flow Information [Abstract] Amortization expense Amortization Entity Filer Category Entity Filer Category Tradeweb Markets Inc Tradeweb Markets Inc [Member] Tradeweb Markets Inc., the reporting entity. Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Payable and due to affiliates Payable and due to affiliates Payable and due to affiliates Other Liabilities Statement [Table] Statement [Table] Current Fiscal Year End Date Current Fiscal Year End Date Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Share repurchase program, amount authorized Stock Repurchase Program, Authorized Amount Receivable and Due From Affiliates Receivable And Due From Affiliates [Member] Receivable And Due From Affiliates Share repurchases pursuant to the Share Repurchase Program (in shares) Stock Repurchased During Period, Shares PEO Name PEO Name Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Bank Stockholders Bank Stockholders [Member] Information relating to the Bank Stockholders. 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 Proceeds from unwinding of out-of-the-money derivative Proceeds from Derivative Instrument, Investing Activities Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding 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 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. Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities 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. Class of Stock [Axis] Class of Stock [Axis] Entities [Table] Entities [Table] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Fair Value, Nonrecurring Fair Value, Nonrecurring [Member] TEL Tradeweb Europe Limited [Member] Tradeweb Europe Limited (TEL) is a Multilateral Trading Facility regulated by the Financial Conduct Authority in the UK, which maintains branches in Asia which are regulated by certain Asian securities regulators. Regulatory Capital Requirements Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Other income (loss), net Other Operating Income (Expense), Net Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Accrued compensation Increase (Decrease) in Employee Related Liabilities Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Entity Information [Line Items] Entity Information [Line Items] Deferred tax asset Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Business Combination and Asset Acquisition [Abstract] Total stockholders’ equity attributable to Tradeweb Markets Inc. Equity, Attributable to Parent Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Long-lived assets Long-Lived Assets Impairment of goodwill Goodwill, Impairment Loss Deferred revenue Increase (Decrease) in Deferred Revenue Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Revenue recognized that was previously deferred Contract with Customer, Liability, Revenue Recognized Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Foreign currency translation adjustments, with no tax benefit for each of the three and nine months ended September 30, 2023 and 2022 Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Refinitiv Refinitiv [Member] Refinitiv, formerly the Thomson Reuters Financial & Risk Business. 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Credit loss expense Accounts Receivable, Credit Loss Expense (Reversal) Additional paid-in capital Additional Paid in Capital Reclassification [Table] Reclassification [Table] Limited Liability Company (LLC) Members' Equity [Abstract] Limited Liability Company (LLC) Members' Equity [Abstract] Assets Derivative Asset Deferred taxes Deferred Income Tax Expense (Benefit) Subsequent Event Type [Axis] Subsequent Event Type [Axis] Proceeds from stock-based compensation exercises Proceeds from Stock Options Exercised Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Income Tax Income Tax, Policy [Policy Text Block] 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. 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