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. 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] All-cash acquisition Payments to Acquire Businesses, Gross 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 currency call option contract – Gross notional amount Foreign currency call option contract not designated in accounting hedge relationship – Other income/(loss) Foreign Exchange Option [Member] Segment Reporting [Abstract] Segment Reporting [Abstract] 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 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. 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] 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 under the plan 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] 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 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. Gross notional amount Derivative, Notional Amount Selling, General and Administrative Expenses General and Administrative Expenses Selling, General and Administrative Expenses [Member] Dividends (in dollars per share) Common Stock, Dividends, Per Share, Declared Measurement Frequency [Axis] Measurement Frequency [Axis] Schedule of Financial Resources and Liquid Financial Resources Futures Commission Merchant, Minimum Financial Requirement [Table Text Block] RSUs Restricted Stock Units (RSUs) [Member] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Revolving credit facility, term Debt Instrument, Term Offering costs incurred Payments of Stock Issuance Costs Depreciation expense Depreciation Income Statement Location [Axis] Income Statement Location [Axis] 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 Revision of Prior Period, Reclassification, Adjustment Revision of Prior Period, Reclassification, Adjustment [Member] Schedule of Maturity of Lease Liabilities and Future Minimum Lease Payments Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Foreign currency forward contracts – Gross notional amount Foreign currency forward contracts not designated in accounting hedge relationship – General and administrative (expenses)/income Foreign Exchange Forward [Member] Tax Receivable Agreement Tax Receivable Agreement Liability Disclosure [Text Block] The entire disclosure of tax receivable agreement liability. 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 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. 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 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 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] 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 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. 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 capitalized 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] 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 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 Cash Equivalents [Member] Expenses Interest Income, Securities, Operating, by Taxable Status [Abstract] Accounts receivable, net of allowance for credit losses of $177 and $129 at June 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 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] 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 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] One Month Secured Overnight Financing Rate One Month Secured Overnight Financing Rate [Member] One Month Secured Overnight Financing Rate Justin Peterson [Member] Justin Peterson Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] 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 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 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 Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding 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] Stock-based compensation expense under the Option Plan APIC, Share-Based Payment Arrangement, Option, Increase for Cost Recognition 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] 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 six months ended June 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. Number of claims dismissed Loss Contingency, Claims Dismissed, Number Expected term (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Revision of Prior Period [Domain] Revision of Prior Period [Domain] Subsequent Events [Abstract] Subsequent Events [Abstract] Income before taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Equity investment without readily determinable fair values Equity Securities without Readily Determinable Fair Value, Amount Fair Value Measurement Fair Value Measurement, Policy [Policy Text Block] Subscription fees Subscription fees Subscription Fee Revenue [Member] Subscription fee revenue from granting access to institutional investors to the entity's electronic marketplaces. Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Hedging Designation [Domain] Hedging Designation [Domain] Activities related to exchanges of LLC Interests (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Significant Observable Inputs (Level 2) Significant Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Entity Emerging Growth Company Entity Emerging Growth Company Additional adjustment Debt Instrument, Adjustment In Addition To Credit Adjustment Spread Debt Instrument, Adjustment In Addition To Credit Adjustment Spread Accounts Payable and Accrued Liabilities Accounts Payable and Accrued Liabilities [Member] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table] Intangible assets, net of accumulated amortization Intangible Assets, Net (Excluding Goodwill) Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Tradeweb Markets LLC TradeWeb Markets Llc [Member] Tradeweb Markets LLC. Document Fiscal Period Focus Document Fiscal Period Focus 2024 Lessee, Operating Lease, Liability, to be Paid, Year One Useful life of intangible assets Finite-Lived Intangible Asset, Useful Life Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] 2027 Lessee, Operating Lease, Liability, to be Paid, Year Four Title Trading Arrangement, Individual Title Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Variable Variable Pricing [Member] Contract with customer in which amount of consideration is based on variable components such as transaction based fees. 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Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Assets Assets [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Net Income Per Share Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Total Liabilities, Fair Value Disclosure Foreign currency transaction loss, before tax Gain (Loss), Foreign Currency Transaction, before Tax Contract with Customer, Basis of Pricing [Domain] Contract with Customer, Basis of Pricing [Domain] Payroll taxes paid for stock-based compensation Payment, Tax Withholding, Share-Based Payment Arrangement Deposits with clearing organizations Deposits with clearing organizations Deposits with Clearing Organizations and Others, Securities Liabilities Liabilities [Abstract] Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Income taxes paid, net of (refunds) Income Taxes Paid, Net Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Deferred tax asset Deferred Income Tax Assets, Net Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] 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. Retained Earnings Retained Earnings [Member] Schedule of Total Stock-based Compensation Expense Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Occupancy Occupancy Occupancy, Net Total liabilities and equity Liabilities and Equity Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Ownership [Domain] Ownership [Domain] 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. Risk free interest rate (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Basic (in dollars per share) Earnings per share - Basic (in dollars per share) Earnings Per Share, Basic Lease right-of-use assets Operating Lease, Right-of-Use Asset Other assets – Memberships in clearing organizations Receivables from Clearing Organizations Credit Risk Allowance for Credit Losses [Text Block] Accounting Policies [Abstract] Accounting Policies [Abstract] Effect of foreign currency exchange rate changes Contract With Customer, Liability, Foreign Currency Exchange Rate Contract With Customer, Liability, Foreign Currency Exchange Rate NFI Acquisition NFI Acquisition [Member] NFI Acquisition Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Remainder of 2023 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Net income attributable to outstanding shares of Class A and Class B common stock - Diluted Net Income (Loss) Available to Common Stockholders, Diluted Arrangement Duration Trading Arrangement Duration Entity Address, City or Town Entity Address, City or Town Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Schedule of Information Regarding Revenue by Client Sector Schedule of Segment Reporting Information, by Segment [Table Text Block] Class C Common Stock Common Class C [Member] New billings Contract With Customer Liability, New Billings Amount of deferred revenue recognized for new billing arising during the current reporting period. Pushdown Accounting Consolidation, Policy [Policy Text Block] Receivable and due from affiliates/payable and due to affiliates, net Increase (Decrease) Due from Affiliates Document Transition Report Document Transition Report Award Timing Predetermined Award Timing Predetermined [Flag] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Stock repurchase program, remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount 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 Termination Date Trading Arrangement Termination Date Common Stock, shares authorized (in shares) Common Stock, Shares Authorized Billy Hult [Member] Billy Hult Awarded during 2022 and prior Awarded During 2022 And Prior [Member] Awarded During 2022 And Prior Excess Liquid Financial Assets Excess Liquid Financial Assets The amount by which actual liquid financial assets exceeds (does not exceed) required liquid financial assets under the Commodity Exchange Act Fair Value of Financial Instruments Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] 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 Non-Controlling Interests Noncontrolling Interest [Line Items] Derivative Instrument [Axis] Derivative Instrument [Axis] PSUs Phantom Share Units (PSUs) [Member] Letter of credit issued Long-Term Debt, Gross Total LLC Interests outstanding (in shares) Minority Interest Total Number Of Interests The total number of shares of the subsidiary. Related Party Transactions [Abstract] Related Party Transactions [Abstract] All Trading Arrangements All Trading Arrangements [Member] 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. All Adjustments to Compensation All Adjustments to Compensation [Member] Derivative [Line Items] Derivative [Line Items] Award Timing Disclosures [Line Items] Title of Individual [Domain] Title of Individual [Domain] Stock split ratio, common stock Stockholders' Equity Note, Stock Split, Conversion Ratio Compensation Amount Outstanding Recovery Compensation Amount Dividends payable Dividends Payable 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. Credit loss expense (reversal) 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. Insider Trading Arrangements [Line Items] Accounts receivable, allowance for credit losses Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss PRSU PRSUs Equity Settled Performance Based Restricted Stock Units [Member] Equity Settled Performance Based Restricted Stock Units [Member] General and administrative Other General and Administrative Expense Related Party [Axis] Related Party, Type [Axis] Tax receivable agreement liability Tax Receivable Agreement Liability The carrying amount as on the balance sheet date of tax receivable agreement liability. Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Other assets Other assets Other Assets Entity Registrant Name Entity Registrant Name Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Award Timing Method Award Timing Method [Text Block] Regulatory Capital Regulatory Capital Regulatory capital as calculated for each entity under applicable regulations. Dilutive securities (in shares) Dilutive effect (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Other assets Increase (Decrease) in Other Operating Assets Adjustment to Compensation, Amount Adjustment to Compensation Amount Non-controlling interests Equity, Attributable to Noncontrolling Interest Document Period End Date Document Period End Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Adoption Date Trading Arrangement Adoption Date Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Software Development Costs Internal Use Software, Policy [Policy Text Block] Entity Central Index Key Entity Central Index Key Revenue recognized Contract With Customer, Liability, Revenue Recognized Including New Billings Contract With Customer, Liability, Revenue Recognized Including New Billings Business Segment and Geographic Information Segment Reporting Information [Line Items] Total stock-based compensation expense Share-Based Payment Arrangement, Expense Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Provision for income taxes Income Tax Expense (Benefit) International Non-US [Member] Cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract] Regulatory Capital Requirements Regulatory Capital Requirements [Text Block] The entire disclosure of capital requirements and required financial resources under applicable regulations. Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Name Trading Arrangement, Individual Name Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Four Lessee, Operating Lease, Liability, to be Paid, after Year Four Award Date [Axis] Award Date [Axis] Schedule of Breakdown of Revenues Between Fixed and Variable Revenues Disaggregation of Revenue [Table Text Block] Issuance of common stock from equity incentive plans Stock Issued During Period, Value, New Issues Risks and Uncertainties [Abstract] Risks and Uncertainties [Abstract] Total revenue Total revenue Revenues Revenue from Contract with Customer, Excluding Assessed Tax Entity [Domain] Entity [Domain] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Amendment Flag Amendment Flag Legal Entity [Axis] Legal Entity [Axis] Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Number of shares withheld (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Net interest income (expense) Interest Income (Expense), Net Deferred tax asset Other Noncash Income Tax Expense Common stock repurchased (in shares) Treasury Stock, Shares, Acquired Regulatory Capital Requirement Regulatory Capital Requirement Amount of regulatory capital required to be maintained for each entity under applicable regulations. Business Combinations Business Combinations Policy [Policy Text Block] Basis variable spread rate Debt Instrument, Basis Spread on Variable Rate Useful life Property, Plant and Equipment, Useful Life Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Diluted (in shares) Weighted average shares of Class A and Class B common stock outstanding - Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Software Development Costs Software Development [Member] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Schedule of Recognized Revenue and Remaining Deferred Revenue Balance Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] TWM LLC TWM LLC [Member] TWM LLC Expenses Operating Expenses [Abstract] Revenue Revenue from Contract with Customer [Text Block] Purchases of furniture, equipment, software and leasehold improvements Payments to Acquire Property, Plant, and Equipment Company Selected Measure Amount Company Selected Measure Amount 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 TESBV Tradeweb Execution Services B.V. [Member] Tradeweb Execution Services B.V. Additional Paid-In Capital Additional Paid-in Capital [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Total assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Commitments and Contingencies Loss Contingencies [Line Items] Revision of Prior Period [Axis] Revision of Prior Period [Axis] Cover [Abstract] Subsequent Events Subsequent Events [Text Block] U.S. UNITED STATES Employee compensation and benefits Employee compensation and benefits Labor and Related Expense Schedule of the Impact on Equity Due to Changes in the Company’s Ownership Interest in Noncontrolling Interest Schedule Of Impact On Equity Due To Changes In The Company’s Ownership Interest In Noncontrolling Interest [Table Text Block] Tabular disclosure of impact on equity due to changes in the Company’s ownership interest in noncontrolling interest. Cash paid for foreign currency call option Payments for Derivative Instrument, Investing Activities Non-NEOs Non-NEOs [Member] Total future lease payments Lessee, Operating Lease, Liability, to be Paid Market Data Market Data Client Sector [Member] The market data client sector. Business Segment and Geographic Information Segment Reporting Disclosure [Text Block] Shares redeemed (in shares) Stock Redeemed or Called During Period, Shares Net increase (decrease) in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Receivable from/payable to brokers and dealers and clearing organizations, net Increase (Decrease) in Receivable from Broker-Dealer and Clearing Organization Non-PEO NEO Non-PEO NEO [Member] Equity Component [Domain] Equity Component [Domain] Restricted Cash Equivalents [Abstract] Restricted Cash Equivalents [Abstract] Adjustment to Compensation: Adjustment to Compensation [Axis] Net transfers (to) from non-controlling interests Transfers From (To) Noncontrolling Interests Amount of net transfers from (to) non controlling interest. 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Revenues Revenue: Revenues [Abstract] Consolidated Entities [Domain] Consolidated Entities [Domain] Retail Retail Client Sector [Member] The retail client sector. Public Investors Public Investors [Member] This member stands for public investors, collectively. Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Amortization of pushdown accounting allocation Amortization Period Pushdown Accounting Adjustment Amortization period for pushdown accounting adjustments. 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