Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Correlation to S&P 500 index time period (in years) Correlation To Stock Index Time Period Period of time related to S&P 500 Index. Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Net income allocated to common stockholders Net income allocated to common stockholders Net Income (Loss) Available to Common Stockholders, Diluted Restricted cash and cash equivalents and customer bank deposits (included in margin deposits, default fund, and interoperability fund) Increase (Decrease) In Restricted Cash (Clearing Fund) The amount of increase (decrease) in restricted cash and cash equivalents and customer bank deposits (included in margin deposits, clearing funds, and interoperability funds). Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Segment Reporting [Abstract] Segment Reporting [Abstract] Compensation and benefit-related liabilities Employee-related Liabilities, Current Euros EURIBOR Euros EURIBOR Represents the information pertaining to euros EURIBOR member. Measurement Frequency [Axis] Measurement Frequency [Axis] Cboe Australia Cboe Australia [Member] Represents information related to Cboe Australia. Consolidated Entities [Axis] Consolidated Entities [Axis] Average price paid per share (in dollars per share) Shares Acquired, Average Cost Per Share Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Common stock, votes per share Common Stock Number Of Votes Per Share Represents the number of votes per share holders of common stock are entitled to. After 2030 Lessee Operating Lease Liability Payments Due After Year Four Amount of lessee's undiscounted obligation for lease payment for operating lease due after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Leases [Abstract] Leases [Abstract] Consolidated Entities [Domain] Consolidated Entities [Domain] Maximum number of shares that a participant can purchase during any single offering period Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Number of Shares Per Employee Cboe Clear U.S. Cboe Clear Digital [Member] It represents the information pertaining to the Cboe Clear Digital. Margin Deposits Margin Deposits [Member] Represents information pertaining to margin deposits. Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Cash and cash equivalents Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents Intangible assets, net Balance at beginning of the period Balance at end of the period Intangible assets, net Intangible Asset, Excluding Goodwill, after Accumulated Amortization Beginning balance (in shares) Ending balance of Outstanding and exercisable (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Retirement Benefits [Abstract] Retirement Benefits [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Allowance for notes receivable credit losses Notes Receivable [Member] Other equity investments Other Equity Investments [Member] Represents information pertaining to Other Equity Investments. Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] 2011 Share Repurchase Program 2011 Share Repurchase Program [Member] 2011 Share Repurchase Program Number of reportable segments Number of Reportable Segments Total current liabilities Liabilities, Current Deferred revenue Disposal Group, Including Discontinued Operation, Deferred Revenue, Current Customer relationships Customer Relationships [Member] Entity Address, City or Town Entity Address, City or Town Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Components of interest expense: Interest Expense, Debt [Abstract] Number of Shares Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Minimum collateralization, as a percent Clearing Participant, Reverse Repurchase, Collateralization, As A Percent, Minimum Clearing Participant, Reverse Repurchase, Collateralization, As A Percent, Minimum 3.000% Senior Notes 3.000% Senior Notes Due March 2032 [Member] Senior Notes Due 2032 [Member] Data processing software Software, Internally Developed and Purchased [Member] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Foreign Plan Foreign Plan [Member] Data processing software, net Intangible Asset, Finite-Lived, after Accumulated Amortization Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Number of types of regulatory fees recognized Number Of Types Of Regulatory Fees The number of types of regulatory fees that the Company recognizes, which is further clarified in the narrative. Level 2 Fair Value, Inputs, Level 2 [Member] Non-operating income (expense): Non-operating income (expenses): Nonoperating Income (Expense) [Abstract] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Investment in Eris Innovations Holdings, LLC Eris Innovations Holdings, LLC [Member] Represents information related to Investment in Eris Exchange Holdings, LLC. United States UNITED STATES Subsequent Event Type [Axis] Subsequent Event Type [Axis] Number of European markets in which equity derivatives are cleared Number Of European Markets In Which Equity Derivatives Are Cleared Represents the number of European markets in which equity is cleared. Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Comprehensive income allocated to common stockholders, net of income tax Comprehensive Income Loss Available To Common Stockholders After Tax The amount of comprehensive income (loss) available to common stockholders after tax and any allocation of participating securities. Summarized Financial Data of Reportable Segments Segment Reporting [Table Text Block] Other comprehensive (loss) income: Other Comprehensive Income (Loss), before Tax [Abstract] Banking Regulation, Regulatory Capital Requirement, Compliance [Table] Banking Regulation, Regulatory Capital Requirement, Compliance [Table] Other comprehensive (loss) income Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Schedule of Maturities of Lease Liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Document Period End Date Document Period End Date Revenue recognized from contract liabilities and remaining balance Deferred Income [Roll Forward] Correlation with S&P 500 index Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Correlation with Stock Index Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Correlation with stock index Liabilities held for sale Total liabilities held for sale Disposal Group, Including Discontinued Operation, Liabilities, Current Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Debt instrument face amount Debt Instrument, Face Amount 2028 Lessee, Operating Lease, Liability, to be Paid, Year Two Supplemental disclosure of cash transactions: Supplemental Disclosure of Cash Transactions [Abstract] Supplemental Disclosure of Cash Transactions Basic earnings per share numerator: Earnings Per Share, Basic [Abstract] Accounts payable and accrued liabilities Disposal Group, Including Discontinued Operation, Accounts Payable and Accrued Liabilities, Current Debt instrument, threshold amount transferred to provider of settlement or custody services Debt Instrument, Threshold Amount Transferred To Provider Of Settlement Or Custody Services The threshold amount transferred to (or secured in favor of) any provider of settlement or custody services under the debt instrument arrangement. Term of agreement (in years) Debt Instrument, Term Common stock in treasury, at cost: 389,420 shares at June 30, 2026 and 7,025 shares at December 31, 2025 Treasury Stock, Common, Value Number of central counterparties with whom interoperable agreements are held Number Of Central Counterparties With Whom Interoperable Arrangements Are Made Represents the number of other central counterparties with whom interoperable arrangements are made. Leases Lessee, Lease, Description [Line Items] Accumulated other comprehensive income, net Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Current operating lease liabilities Operating Lease, Liability, Current Trademarks and tradenames Trademarks and Trade Names [Member] EARNINGS PER SHARE Earnings Per Share [Text Block] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Schedule of Disaggregated Revenue Contract Types Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Table Text Block] Total liabilities Liabilities Trading Symbol Trading Symbol Other assets Increase (Decrease) In Other Assets Increase (Decrease) in Other Assets. Software development work in progress Software, In-Development [Member] Income taxes payable Accrued Income Taxes, Current Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Company Selected Measure Name Company Selected Measure Name Sale of Stock [Domain] Sale of Stock [Domain] Purchases of available-for-sale financial investments Payments to Acquire Debt Securities, Available-for-Sale Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Diluted earnings per share numerator: Earnings Per Share, Diluted [Abstract] Digital assets held Digital Assets Held [Member] Digital assets held. Schedule of Total Margin Deposits, Clearing Funds, and Interoperability Fund Deposits Schedule Of Clearing Participant Deposits [Table Text Block] Tabular disclosure of clearing participant margin deposits and contributions to clearing fund and interoperability fund. Revolving Credit Agreement Revolving Credit Agreement Revolving Credit Agreement [Member] Cboe Trading and BIDS Trading Cboe Trading And BIDS Trading [Member] Represents information pertaining to cboe and bids trading. Schedule of Supplemental Balance Sheet Information Related to Leases Lease Balance Sheet Disclosure [Table Text Block] The tabular disclosure of lease balance sheet. Credit Facility [Domain] Credit Facility [Domain] Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Total purchase price Treasury Stock, Value, Acquired, Cost Method, Excluding Excise Tax And Noncash Impacts Treasury Stock, Value, Acquired, Cost Method, Excluding Excise Tax And Noncash Impacts Disposal Group Name [Domain] Disposal Group Name [Domain] Credit Loss [Abstract] Credit Loss [Abstract] US Treasury Securities US Treasury Securities [Member] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Schedule of Components of Assets and Liabilities Held for Sale Disposal Groups, Including Discontinued Operations [Table Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Revenues less cost of revenues Revenues less cost of revenues Gross Profit Cash paid for amounts included in the measurement of lease liabilities Operating Lease, Payments Award Timing Predetermined Award Timing Predetermined [Flag] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Level 1 Fair Value, Inputs, Level 1 [Member] Effective income tax rate (in percent) Effective Income Tax Rate Reconciliation, Percent Grantee Status [Domain] Grantee Status [Domain] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] Dilutive common shares issued under stock program (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Number of subsidiaries that may be designated as additional borrowers Number Of Subsidiaries That May Be Designated As Additional Borrowers The number of subsidiaries that may be designated as additional borrowers. Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Maximum borrowing capacity, increase limit Line of Credit Facility, Accordion Feature, Increase Limit Line of Credit Facility, Accordion Feature, Increase Limit Depreciation expense Depreciation Accounts receivable, net Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net Maximum borrowing capacity, total with increase Line of Credit Facility, Accordion Feature, Higher Borrowing Capacity Option Line of Credit Facility, Accordion Feature, Higher Borrowing Capacity Option Operating lease right of use assets Operating lease right of use assets Operating Lease, Right-of-Use Asset Debt instrument, amount to meet minimum liquidity regulations Debt Instrument, Amount To Meet Liquidity Regulations The threshold amount to meet minimum liquidity regulations under the debt instrument covenant. Renewal term Lessee, Operating Lease, Renewal Term Number of European markets in which equity is cleared Number Of European Markets In Which Equity Is Cleared Number Of European Markets In Which Equity Is Cleared Qualified retirement eligibility number of years of service for grants awarded between 2017 and 2023 Qualified Retirement Eligibility Years Of Service For Grants Awards In And After 2017 The qualified retirement eligibility number of years of service for grants awarded in and after 2017. Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Number of clearing houses operated Number Of Clearing Houses Operated Represents the number of clearing houses that the entity operates. Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Reclassification, Type [Domain] Reclassification, Type [Domain] Cash dividends on common stock Payments of Ordinary Dividends, Common Stock Expiration Date Trading Arrangement Expiration Date 2030 Long-Term Debt, Maturity, Year Four Minimum consolidated interest ratio, scenario two Debt Instrument, Covenant, Interest Coverage Ratio, Minimum, Scenario Two Debt Instrument, Covenant, Interest Coverage Ratio, Minimum, Scenario Two. Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Customer bank deposits (included in margin deposits, default fund, and interoperability fund) Restricted Cash and Cash Equivalents, Deposits Customers and Banks Amount of cash and cash equivalents restricted as to withdrawal or usage relating to deposit customers and banks. Data Vantage Data And Access Solutions [Member] Represents information pertaining to data and access solutions member. Cboe Clear Europe non-cash contributions Clearing Participant Deposits, Non-Cash Contributions The amount of non-cash contributions made by clearing participants as on the balance sheet date. Dividends Dividends, Common Stock [Abstract] Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Restricted cash and cash equivalents (included in other current assets) Restricted Cash and Cash Equivalents In Other Current Assets Amount of cash and cash equivalents restricted in other current assets. Unrecognized compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Minimum net capital required to be maintained (in percent) Minimum Net Capital To Be Maintained Percentage Of Aggregate Indebtedness Items Amount of minimum net capital required to be maintained based on percentage of aggregate indebtedness items. Segments [Domain] Segments [Domain] INVESTMENTS Equity Method Investments and Other Equity Instruments [Text Block] The entire disclosure for equity method investments and other equity instruments are investments that give the investor the ability to exercise significant influence over the operating and financial policies of an investee. DEBT Debt Disclosure [Text Block] Schedule of Fair Value of Debt Obligation Schedule of Fair Value of Debt [Table Text Block] Tabular disclosure for the fair value of debt obligations. Disposal Group Classification [Domain] Disposal Group Classification [Domain] Debt issuance costs Debt Issuance Costs, Net Minimum consolidated interest ratio Debt Instrument, Covenant, Interest Coverage Ratio, Minimum Debt Instrument, Covenant, Interest Coverage Ratio, Minimum Liquidity provider sliding scale Liquidity Provider Sliding Scale [Member] Represents the information pertaining to up-front payments arrangement. Restructuring and Related Costs Restructuring and Related Costs [Table Text Block] Business Combination [Table] Business Combination [Table] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Default and liquidity waterfalls regulatory capital, scenario one Default and Liquid Waterfalls, Own Clearing Percent, Regulatory Capital, Scenario One The percent of own regulatory capital is used for clearing the default and liquid waterfalls participants. Interest rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Cash dividends on common stock Aggregate payout Dividends, Common Stock, Cash Total stockholders’ equity Beginning balance Ending balance Equity, Attributable to Parent Proceeds from investments Proceeds from Investments The amount of cash received from investments. Number of token issued in a exchange or transaction Intangible Asset, Number of Tokens Issued Number of tokens issued in a exchange or transaction. Assets Assets [Abstract] Fair Value, Nonrecurring Fair Value, Nonrecurring [Member] Professional fees and outside services Professional Fees Insider Trading Policies and Procedures [Line Items] ACCOUNTS PAYABLE AND ACCRUED LIABILITIES Accounts Payable and Accrued Liabilities Disclosure [Text Block] Summary of Performance-based Restricted Stock Units Activity Schedule of Nonvested Share Activity [Table Text Block] Accounts receivable, allowance for credit loss, current Accounts Receivable, Allowance for Credit Loss, Current Performance Shares Performance Shares [Member] Provision (benefit) for deferred income taxes Deferred Income Tax Expense (Benefit) Total cash margin deposits, default fund, and interoperability fund Clearing Participant Deposits, Total Contributions The amount of total contributions made by clearing participants as on the balance sheet date. Interest (income) expense, net Interest Income (Expense), Nonoperating Reconciliation of cash, cash equivalents, and restricted cash and cash equivalents: Reconciliation Of Cash Cash Equivalents And Restricted Cash And Cash Equivalents [Abstract] No definition available. Reclassified to liabilities held for sale Contract With Customer, Liability, Reclassified To Liabilities Held For Sale Contract With Customer, Liability, Reclassified To Liabilities Held For Sale Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] Anti-dilutive shares excluded from the computation of diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Marketing fee payable Accrued Marketing Costs, Current Schedule of Goodwill Details by Segment Goodwill [Table Text Block] Entity Central Index Key Entity Central Index Key Less accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Equity [Abstract] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Remainder of 2026 Long-Term Debt, Maturity, Remainder of Fiscal Year Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Investment, Name [Axis] Investment, Name [Axis] Share Repurchase Program [Table] Share Repurchase Program [Table] Digital assets held Crypto Asset, Fair Value, Restricted Cboe Clear U.S. Cboe Clear U.S. [Member] Cboe Clear U.S. Interest rate margin (as a percent) Debt Instrument, Basis Spread on Variable Rate Variable Rate [Domain] Variable Rate [Domain] Accumulated other comprehensive (loss) income, net Accumulated Other Comprehensive Income, Net AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue [Table Text Block] Unrecognized compensation expense, period for recognition Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Consolidated Statements of Income Statement [Line Items] Total assets Assets Data Vantage Data Vantage [Member] Data Vantage Shares reserved for future issuance Common Stock, Capital Shares Reserved for Future Issuance Cboe Trading Cboe Trading [Member] Represents information related to Cboe Trading. Operating Segments Operating Segments [Member] Interest expense Interest expense Interest Expense, Nonoperating Total other equity investments Equity Securities without Readily Determinable Fair Value, Amount STOCK-BASED COMPENSATION Share-Based Payment Arrangement [Text Block] Impairment of indefinite-lived intangible assets Intangible Asset, Excluding Goodwill, Indefinite-Lived, Impairment Loss Facilities costs Occupancy, Net PEO PEO [Member] 2028 Long-Term Debt, Maturity, Year Two CREDIT LOSSES Credit Loss, Financial Instrument [Text Block] Investment in CSD BR Investment In CSD BR [Member] Represents information pertaining to CSD Brazilian Bank. CLEARING OPERATIONS Broker-Dealer Disclosure [Text Block] Financial investments Marketable Securities, Current Other non-current liabilities Other Liabilities, Noncurrent Goodwill Balance at beginning of the period Balance at end of the period Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Cboe Fixed Income Cboe Fixed Income Markets [Member] Represents information pertaining to Cboe Fixed Income Markets. Qualified retirement eligibility age for grants awarded between 2017 and 2023 Qualified Retirement Eligibility Age For Grants Awards In And After 2017 The qualified retirement eligibility age for grants awarded in and after 2017. Retained earnings Retained Earnings [Member] Non-current operating lease liabilities Non-current operating lease liabilities Operating Lease, Liability, Noncurrent Total operating expenses Operating Expenses Money market funds Money Market Funds [Member] Revolving Credit Agreement Revolving Credit Facility [Member] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Foreign Currency Translation Adjustment Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Schedule of Fair Value Hierarchy for Assets and Liabilities Held Fair Value, by Balance Sheet Grouping [Table Text Block] Diluted earnings per share (in USD per share) Diluted earnings per share (in USD per share) Earnings Per Share, Diluted Royalty fees and other cost of revenues Royalty fees and other cost of revenues Represents the royalty fees primarily consist of license fees paid by us for the use of underlying indexes in our proprietary products usually based on contracts traded. Current period benefit of expected credit losses Financing Receivable, Credit Loss, Expense (Reversal) Amortization expense Amortization Intangible Asset, Finite-Lived, Amortization Expense Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Intangible Assets Intangible Asset, Finite-Lived [Line Items] Broker-Dealer [Abstract] Broker-Dealer [Abstract] Share-Based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Borrowing capacity available Line of Credit Facility, Remaining Borrowing Capacity Schedule of Investments Investment [Table Text Block] Assets held for sale Total assets held for sale Disposal Group, Including Discontinued Operation, Assets, Current Allowance balance at beginning of period Allowance balance at end of period Financing Receivable, Allowance for Credit Loss Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Share Repurchase Program Share Repurchase Program [Line Items] Investments Investments, held for sale Disposal Group, Including Discontinued Operation, Investment Construction in progress Construction in Progress [Member] Schedule of Future Expected Repayments Related to Senior Notes Schedule of Maturities of Long-Term Debt [Table Text Block] Sale of Stock [Axis] Sale of Stock [Axis] Property and equipment, net Property and equipment, held for sale Disposal Group, Including Discontinued Operation, Property, Plant, and Equipment, Current Contract With Customer, Contract Type [Domain] Contract With Customer, Contract Type [Domain] Contract With Customer, Contract Type [Domain] Restructuring and related cost, expected cost remaining Restructuring and Related Cost, Expected Cost Remaining Operating income Operating Income (Loss) ACQUISITIONS AND STRATEGIC REALIGNMENT Business Combination [Text Block] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Disposal group, including discontinued operation, operating lease liability Disposal Group, Including Discontinued Operation, Operating Lease Liability Disposal Group, Including Discontinued Operation, Operating Lease Liability Impairment of assets Asset, Impairment Loss Schedule of Changes in Allowance for Credit Loss Financing Receivable, Allowance for Credit Loss [Table Text Block] Common stock, shares issued (in shares) Common Stock, Shares, Issued OTHER ASSETS, NET Other Assets Disclosure [Text Block] ACCUMULATED OTHER COMPREHENSIVE INCOME, NET Comprehensive Income (Loss) Note [Text Block] Accounts receivable Increase (Decrease) in Accounts Receivable Product and Service [Domain] Product and Service [Domain] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Supplier Finance Program [Line Items] Supplier Finance Program [Line Items] Deferred income taxes Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Revenue from contract liabilities Contract with Customer Liability [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Company contribution amount Defined Contribution Plan, Cost 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Subsequent Events [Abstract] Subsequent Events [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Update to Significant Accounting Policies Significant Accounting Policies [Policy Text Block] Disclosure of significant accounting policies. Cboe Clear U.S. customer bank deposits Clearing Participant Deposits, Cash Contributions The amount of cash contributions made by clearing participants as on the balance sheet date. Fair Value as of Grant Date Award Grant Date Fair Value Redemption price (as a percent) Debt Instrument, Redemption Price, Percentage Reclassified to assets held for sale Intangible Assets, Reclassification To Assets Held-For-Sale Intangible Assets, Reclassification To Assets Held-For-Sale Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Availability remaining under existing share repurchase authorizations Share Repurchase Program, Remaining Authorized, Amount Arrangement Duration Trading Arrangement Duration Cboe NL Cboe NL [Member] Represents information related to Cboe Europe NL. Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name EMPLOYEE BENEFIT PLANS Compensation and Employee Benefit Plans, Other than Share-Based Compensation [Text Block] Default Fund Default Funds [Member] Represents information pertaining to default funds. 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Minimum net capital required to be maintained, amount Minimum Net Capital To Be Maintained Amount of minimum net capital required to be maintained. 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Decrease in long-term notes receivable Financing Receivable, after Allowance for Credit Loss, Noncurrent Granted (in USD 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 Subsequent Event Type [Domain] Subsequent Event Type [Domain] Regulatory fees Regulatory Fees [Member] Regulatory Fees [Member] Payables and Accruals [Abstract] Payables and Accruals [Abstract] Current unrecognized tax benefits Taxes Payable, Current Forfeited (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash flows used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Other current liabilities Disposal Group, Including Discontinued Operation, Other Liabilities, Current Liabilities: Liabilities, Fair Value Disclosure [Abstract] Maximum consolidated leverage ratio Debt Instrument, Covenant, Leverage Ratio, Maximum Debt Instrument, Covenant, Leverage Ratio, Maximum 2029 Long-Term Debt, Maturity, Year Three Number of shares of common stock of which unit is convertible (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Number of Shares of Common Stock of Which Instrument is Convertible Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Number of Shares of Common Stock of Which Instrument is Convertible Term of restricted tokens issued (in years) Term of Restricted Tokens Issued The term of restricted tokens issued in years. Cash flows used in financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Property and equipment, net Property and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Repurchases of common stock from employee stock plans Treasury Stock Value Acquired From Employee Stock Plans Cost Method Equity impact of the cost of common and preferred stock that were repurchased from employee stock plans during the period. Recorded using the cost method. Financial Instruments [Domain] Financial Instruments [Domain] Restricted cash and cash equivalents (included in assets held for sale) Restricted cash Disposal Group, Including Discontinued Operation, Restricted Cash Disposal Group, Including Discontinued Operation, Restricted Cash Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] GOODWILL, INTANGIBLE ASSETS, NET, AND DIGITAL ASSETS HELD Intangible Asset and Goodwill [Text Block] Underlying Securities Award Underlying Securities Amount REVENUE RECOGNITION Revenue from Contract with Customer [Text Block] Preferred stock Preferred Stock [Member] Weighted average discount rate (in percent) Operating Lease, Weighted Average Discount Rate, Percent Other, net Other, Net [Member] Other Deferred Revenue Arrangement [Member] Summary of Restricted Stock Activity Nonvested Restricted Stock Shares Activity [Table Text Block] Segment Reporting [Table] Segment Reporting [Table] Maximum percentage of annual salary that an employee is permitted to utilize to purchase stock Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Employee Subscription Rate Equity Method Investments and Equity Securities Without Readily Determinable Fair Value [Line Items] Equity Method Investments And Equity Securities Without Readily Determinable Fair Value [Line Items] [Line Items] for Schedule of Cost and Equity Method Investments [Table] Schedule of Lease Cost and Other Information Lease, Cost [Table Text Block] Other current assets (includes restricted cash of $28.4 at June 30, 2026 and $34.1 at December 31, 2025) Increase in other current assets Other Assets, Current Changes in foreign currency exchange rates Intangible Assets, Foreign Currency Translation Gain (Loss) Intangible Assets, Foreign Currency Translation Gain (Loss) Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Operating lease right of use assets Disposal Group, Including Discontinued Operation, Operating Lease Right of Use Assets, Current Disposal Group, Including Discontinued Operation, Operating Lease Right of Use Assets, Current Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Long-lived assets Long-Lived Asset, Excluding Financial Instrument, Customer Relationship, Mortgage Servicing Right, Deferred Policy Acquisition Cost, and Deferred Tax Asset, Amount Transaction and clearing fees Transaction And Clearing Fees [Member] Transaction and Clearing Fees Revenue Technology support services Communications and Information Technology Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Dividends (in dollars per share) Cash dividends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Cboe Clear Europe reverse repurchase and other Clearing Participant Deposits, Reverse Repurchase and Other The amount of reverse repurchase and other deposits made by clearing participants as on the balance sheet date. Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Number of tokens sold Intangible Asset, Number of Tokens Sold Number of tokens issued in an exchange or transaction. Measure: Measure [Axis] Global FX Global FX [Member] Global FX Segment [Member] Common stock held in treasury (in shares) Treasury Stock, Common, Shares Royalties Accrued Royalties, Current Equity Components [Axis] Equity Components [Axis] Other expenses Other Cost and Expense, Operating Cash paid for income taxes, net of refunds Income Tax Paid, after Refund Received Entity Interactive Data Current Entity Interactive Data Current Variable Rate [Axis] Variable Rate [Axis] Deferred compensation plan liabilities Deferred Compensation Liability, Current and Noncurrent Accounts payable and accrued liabilities Total accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities, Current Entity Small Business Entity Small Business Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Unamortized discounts on notes Debt Instrument, Unamortized Discount Shares purchased to satisfy the employee income tax withholdings (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Property and Equipment, Net Property, Plant, and Equipment [Line Items] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other assets, net Total other assets, net Other Assets, Noncurrent Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Regulatory fees cost of revenues Regulatory Fees Cost Of Revenues [Member] Represents the regulatory fees. Remeasurement to fair value Impairment of intangible assets Intangible Asset, Excluding Goodwill, Impairment Loss Subsequent Events Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Deferred income taxes Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities Income before income tax provision Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Commitments and contingencies Commitments and Contingencies Total property and equipment Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] 2030 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Four Executive Category: Executive Category [Axis] Reclassified to assets held for sale Goodwill, Reclassification To Assets Held-For-Sale Goodwill, Reclassification To Assets Held-For-Sale Counterparty Name [Axis] Counterparty Name [Axis] Services transferred at a point in time Transferred at Point in Time [Member] Liabilities and Stockholders’ Equity Liabilities and Equity [Abstract] Other Other Countries [Member] Other Countries Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Excise tax on purchase of common stock Excise Tax on Purchases of Common Stock Excise Tax on Purchases of Common Stock Supplemental disclosure of cash transactions: Supplemental Cash Flow Information [Abstract] PEO Name PEO Name Shares vested, prompting share repurchases to cover employees' tax obligations Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Prompting Share Repurchases To Satisfy Employee Tax Obligations The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period, prompting share repurchases to satisfy employee tax obligations. Other segment operating expenses Segment Reporting, Other Segment Item, Amount Long-Lived Asset, Class [Axis] Long-Lived Asset, Class [Axis] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Section 31 fees payable Increase (Decrease) in Regulatory Fees Payable Increase (decrease) in Section 31 fees payable. Entity Tax Identification Number Entity Tax Identification Number Net income allocated to participating securities Net Income (Loss) Allocated to Participating Securities, Basic The amount of net income (loss) allocated to participating securities, basic. Long-term notes receivable, net Accounts and Financing Receivable, after Allowance for Credit Loss, Noncurrent Intangible assets, net Disposal Group, Including Discontinued Operation, Intangible Assets, Current Accrued liabilities Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Base Rate Base Rate [Member] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Data Provider Agreement with Pyth Data Association Data Provider Agreement with Pyth Data Association Represents information pertaining to data provider agreement with pyth data association. Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Number of shares of common stock repurchased (in shares) Treasury Stock, Shares, Acquired, Excluding Non-Cash Impacts Treasury Stock, Shares, Acquired, Excluding Non-Cash Impacts Measurement Frequency [Domain] Measurement Frequency [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Subsequent Event [Table] Subsequent Event [Table] Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Compensation and benefits Labor and Related Expense Exercise price per share of common stock as a percent of fair market value Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent Disposal Group Name [Axis] Disposal Group Name [Axis] Employee Stock Employee Stock [Member] Basic earnings per share (in USD per share) Basic earnings per share (in USD per share) Earnings Per Share, Basic Total current assets Assets, Current Insider Trading Arrangements [Line Items] Cboe SEF SEF [Member] Represents information related to Cboe SEF. Long-term debt Long-Term Debt, Excluding Current Maturities Accounts receivable, net of $5.4 allowance for credit losses at June 30, 2026 and $6.8 at December 31, 2025 Accounts Receivable, after Allowance for Credit Loss, Current Summary of Repurchased Shares of the Company's Common Stock Under the Share Repurchase Program Class of Treasury Stock [Table Text Block] Option to terminate period (in years) Lessee Operating Lease Option to Terminate Period Term of lessee's operating lease termination, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Expected volatility (in percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Access and capacity fees Access And Capacity Fees [Member] Access and capacity fees revenue. Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] ORGANIZATION AND BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Cover [Abstract] Cover [Abstract] Capital resources requirement Capital Resources Requirement Capital Resources Requirement Clearing Operations [Table] Clearing Operations [Table] Schedule of information relating to clearing operations. Clearing Operations Clearing Operations [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. United Kingdom UNITED KINGDOM Other revenue Other Revenue [Member] Other Revenues [Member] Equity, Fair Value, upward price adjustment, annual amount Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount Equity Awards Adjustments Equity Awards Adjustments [Member] Travel and promotional expenses Marketing Advertising and Travel Expense The amount of marketing advertising and travel expense. Margin deposits, default fund, and interoperability fund Margin Deposits, Default Fund, And Interoperability Fund, Assets The carrying amount as of the balance sheet date of margin deposits, clearing funds, and interoperability funds included in assets. Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Other liabilities Increase (Decrease) in Other Operating Liabilities Futures Futures [Member] Futures Segment [Member] Regulatory Capital Requirement [Line Items] Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Other income (expense), net Other income (expense), net Other Nonoperating Income (Expense) Lease incentive for leasehold improvements Lease Incentive For Leasehold Improvements Lease Incentive For Leasehold Improvements Schedule of Accounts Payable and Accrued Liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Stockholders’ equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Net income allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Share Repurchase Program [Axis] Share Repurchase Program [Axis] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Cboe Clear Europe Cboe Clear Europe [Member] Represents information related to Cboe Clear Europe. Accrued purchases of data processing software Accrued Purchases of Data Processing Software Accrued Purchases of Data Processing Software Preferred stock Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract] Amortization of debt discount and issuance costs Amortization Of Financing Costs And Discounts And Credit Facility Fees Amount of amortization expense attributable to debt discount (premium) and debt issuance costs and credit facility fees. Aggregate Available Trading Arrangement, Securities Aggregate Available Amount INCOME TAXES Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Other loss (gain) adjustments, net Other Noncash Income (Expense) Debt instrument, threshold net worth on each drawdown Debt Instrument, Threshold Net Worth On Each Drawdown The amount of threshold net worth on each drawdown and delivery of compliance certificates under the debt instrument covenant. Earnings (loss) on investments, net Earnings on investments, net Gain (Loss) on Sale of Other Investments Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Equity Method Investments and Equity Securities Without Readily Determinable Fair Value [Table] Equity Method Investments And Equity Securities Without Readily Determinable Fair Value [Table] Schedule of Cost and Equity Method Investments [Table] Entity Filer Category Entity Filer Category Maximum fair market value of stock an employee can purchase under the plan per calendar year Share Based Compensation Arrangement By Share Based Payment Award Annual Maximum Fair Market Value Of Stock Per Employee The maximum fair market value of stock an employee can purchase under the plan per period. Shares issued under employee stock purchase plan Proceeds From Stock Plans, Net Proceeds From Stock Plans, Net Rebates payable Rebates Payable, Current Carrying value as of the balance sheet date of obligations incurred through that date and payable for rebates. Long-term Debt Long-Term Debt, Fiscal Year Maturity [Abstract] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Assets held for sale: Disposal Group, Including Discontinued Operation, Assets, Current [Abstract] Net income Net income Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current assets: Assets, Current [Abstract] CFE CFE [Member] Represents information related to CFE. Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Right of use assets obtained in exchange for lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Impairment of finite-lived intangible assets Intangible Asset, Finite-Lived, Impairment Loss Vested (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Income tax provision Income tax provision (benefit) Income Tax Expense (Benefit) Investment in Talos Global, Inc. Investment In Talos Global, Inc. [Member] Investment In Talos Global, Inc. Adjustments to reconcile net income to net cash from operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Stock repurchased from employee stock plans (in shares) Treasury Stock, Shares, Acquired, From Employee Stock Plans, Cost Method Number of stock repurchased from employee stock plans during the period. Recorded using the cost method. AOCI Rollforward AOCI Attributable to Parent, Net of Tax [Roll Forward] Additional operating lease liabilities Additional Operating Lease Liabilities Represents the amount of lease liabilities recorded during the period. Statement [Table] Statement [Table] Fed Funds Effective Rate Overnight Index Swap Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Common Stock in Treasury, at Cost Treasury Stock, Number of Shares and Restriction Disclosures [Abstract] Supplemental disclosure of noncash investing and financing activities: Other Noncash Investing and Financing Items [Abstract] Floor Rate Floor Rate Represents the information pertaining to floor rate.