| Access Fees |
| Accounts Payable And Accrued Liabilities Current |
| Accounts Payable And Accrued Liabilities Current And Noncurrent |
| Accounts Payable And Accrued Liabilities Fair Value Disclosure |
| Accounts Payable Current |
| Accounts Receivable Fair Value Disclosure |
| Accounts Receivable Net Current |
| Accrued Acquisition Costs |
| Accrued Expense Data Processing |
| Accrued Expense Linkage |
| Accrued Expenses Facilities |
| Accrued Income Taxes Current |
| Accrued Income Taxes Noncurrent |
| Accrued Legal Fees Current |
| Accrued Liabilites Settlement With Appellants |
| Accrued Marketing Costs Current |
| Accrued Royalties Current |
| Accumulated Depreciation Depletion And Amortization Property Plant And Equipment |
| Accumulated Other Comprehensive Income Loss Net Of Tax |
| Additional Paid In Capital |
| Additional Paid In Capital Common Stock |
| Adjustment For Amortization |
| Adjustments Related To Tax Withholding For Share Based Compensation |
| Adjustmentsto Additional Paidin Capital Purchaseof Noncontrolling Interest |
| Adjustments To Additional Paid In Capital Sharebased Compensation And Exercise Of Stock Options |
| Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value |
| Adverstising Obligations Due Within Four Years |
| Adverstising Obligations Future Amounts Due |
| Advertising Expense |
| Advertising Obligations Due Within One Year |
| Advertising Obligations Due Within Three Years |
| Advertising Obligations Due Within Two Years |
| Advertsing Obligations Due Within Five Years |
| Allocated Share Based Compensation Expense |
| Allowance For Doubtful Accounts Receivable Current |
| Allowance For Loan And Lease Losses Write Offs |
| Amortization Of Debt Discount Premium |
| Amortizationof Debt Issuance Costs Gross |
| Amortization Of Financing Costs |
| Amortization Of Financing Costs And Discounts |
| Amortization Of Intangible Assets |
| Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount |
| Asset Impairment Charges |
| Assets |
| Assets Current |
| Assets Fair Value Disclosure |
| Automatic Conversion Of Shares In Unrestricted Common Stock And Sale Of That In Ipo |
| Available For Sale Securities |
| Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax |
| Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax |
| Available For Sale Securities Fair Value Disclosure |
| Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments |
| Buildings And Improvements Gross |
| Business Acquisition Percentage Of Voting Interests Acquired |
| Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount |
| Business Combination Acquisition Related Costs |
| Business Combination Consideration Transferred Equity Interests Issued And Issuable |
| Business Combination Consideration Transferred Liabilities Extinguished |
| Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 |
| Business Combination Contingent Consideration Liability |
| Business Combination Contingent Consideration Liability Current |
| Business Combination Contingent Consideration Liability Noncurrent |
| Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets |
| Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets |
| Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Equipment |
| Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net |
| Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment |
| Capitalin Excessof Capital Resources Requirement |
| Capitalin Excessof Financial Resources Requirement |
| Capitalized Computer Software Accumulated Amortization |
| Capitalized Computer Software Net |
| Capital Resources Requirement |
| Cash And Cash Equivalents At Carrying Value |
| Cash And Cash Equivalents Fair Value Disclosure |
| Cash And Cash Equivalents Period Increase Decrease |
| Cash And Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect |
| Cbsx Related Expenses |
| Clearing Fees Revenue |
| Common Shares Outstanding |
| Common Stock Dividends Per Share Declared |
| Common Stock Par Or Stated Value Per Share |
| Common Stock Shares Authorized |
| Common Stock Shares Issued |
| Common Stock Shares Outstanding |
| Common Stock Value |
| Communications And Information Technology |
| Comprehensive Income Loss Available To Common Stockholders After Tax |
| Comprehensive Income Loss Availableto Common Stockholders Basic |
| Comprehensive Income Loss Availableto Common Stockholdersbefore Tax Basic |
| Comprehensive Income Lossbefore Tax Attributableto Noncontrolling Interest |
| Comprehensive Income Loss Before Tax Attributable To Noncontrolling Interest |
| Comprehensive Income Lossbefore Tax Attributableto Parent |
| Comprehensive Income Loss Before Tax Attributable To Parent |
| Comprehensive Income Lossbeforetax Including Portion Attributableto Noncontrolling Interest |
| Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest |
| Comprehensive Income Loss Tax Portion Attributableto Parent |
| Comprehensive Income Net Of Tax |
| Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest |
| Comprehensive Undistributed Earnings Loss Allocatedto Participating Securities Basic |
| Comprehensive Undistributed Earnings Loss Allocated To Participating Securities Basic |
| Concentration Risk Customer |
| Construction In Progress Gross |
| Contract Markets Annual Operating Expensesfor Determinationof Resource Adequacy |
| Contract Markets Six Month Operating Expensesfor Determinationof Resource Adequacy |
| Contract Services |
| Contractual Obligation |
| Contractual Obligation Dueafter Sixth Year |
| Contractual Obligation Due In Fifth Year |
| Contractual Obligation Due In Fourth Year |
| Contractual Obligation Due In Next Twelve Months |
| Contractual Obligation Due In Second Year |
| Contractual Obligation Duein Sixth Year |
| Contractual Obligation Due In Third Year |
| Contractual Obligation Excluding Operating Leases Long Term Debtand Other Commitments |
| Contractual Obligation Excluding Operating Leases Long Term Debtand Other Commitments Dueafter Sixth Year |
| Contractual Obligation Excluding Operating Leases Long Term Debtand Other Commitments Duein Fifth Year |
| Contractual Obligation Excluding Operating Leases Long Term Debtand Other Commitments Duein Fourth Year |
| Contractual Obligation Excluding Operating Leases Long Term Debtand Other Commitments Duein Second Year |
| Contractual Obligation Excluding Operating Leases Long Term Debtand Other Commitments Duein Sixth Year |
| Contractual Obligation Excluding Operating Leases Long Term Debtand Other Commitments Duein Third Year |
| Contractual Obligation Excluding Operating Leases Long Term Debtand Other Commitments Remainderof Fiscal Year |
| Contractual Obligation Future Minimum Payments Due Remainder Of Fiscal Year |
| Contractwith Customer Liability |
| Contract With Customer Liability Additions |
| Contract With Customer Liability Current |
| Contractwith Customer Liability Increase Decreasefor Contract Acquiredin Business Combination |
| Contractwith Customer Liability Revenue Recognized |
| Contract With Customer Liability Revenue Recognized |
| Conversion Of Class A1 Common Stock |
| Conversion Of Stock Amount Converted1 |
| Cost Method Investment Ownership Percentage |
| Cost Method Investment Ownership Percentage Other |
| Cost Method Investments |
| Costmethod Investments Realized Losses Excluding Other Than Temporary Impairments |
| Cost Of Revenue |
| Current Federal Tax Expense Benefit |
| Current Foreign Tax Expense Benefit |
| Current Income Tax Expense Benefit |
| Current State And Local Tax Expense Benefit |
| Debt Instrument Carrying Amount |
| Debt Instrument Fair Value |
| Debt Instrument Unamortized Discount |
| Debt Instrument Upfront Fee Percentage |
| Debt Securities Available For Sale Realized Gain Loss Excluding Other Than Temporary Impairment |
| Declared Dividends Per Share |
| Deferred Federal Income Tax Expense Benefit |
| Deferred Finance Costs Gross |
| Deferred Finance Costs Net |
| Deferred Foreign Income Tax Expense Benefit |
| Deferred Income Tax Assets Net |
| Deferred Income Tax Expense Benefit |
| Deferred Income Tax Liabilities |
| Deferred Income Tax Liabilities Net |
| Deferred Revenue |
| Deferred Revenue Additions |
| Deferred Revenue Current |
| Deferred Revenue Period Increase Decrease |
| Deferred Revenue Revenue Recognized |
| Deferred Revenue Revenue Recognized1 |
| Deferred State And Local Income Tax Expense Benefit |
| Deferred Tax Assets Depreciation |
| Deferred Tax Assets Goodwill And Intangible Assets |
| Deferred Tax Assets Gross |
| Deferred Tax Assets Investment In Noncontrolled Affiliates |
| Deferred Tax Assets Investment In Noncontrolled Affiliaties |
| Deferred Tax Assets Liabilities Net |
| Deferred Tax Assets Net |
| Deferred Tax Assets Other |
| Deferred Tax Assets Property Equipmentand Technology |
| Deferred Tax Assets Property Equipment And Technology |
| Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost |
| Deferred Tax Assets Valuation Allowance |
| Deferred Tax Liabilities |
| Deferred Tax Liabilities Deferred Expense |
| Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets |
| Deferred Tax Liabilities Investment In Noncontrolled Affiliates |
| Deferred Tax Liabilities Noncurrent |
| Deferred Tax Liabilities Other |
| Deferred Tax Liabilities Prepaid Expenses |
| Deferred Tax Liabilities Property Plant And Equipment |
| Defined Benefit Plan Accumulated Benefit Obligation |
| Defined Benefit Plan Benefit Obligation Noncash Period Increase Decrease |
| Defined Benefit Plan Benefit Obligation Non Cash Period Increase Decrease |
| Defined Benefit Plan Contributions By Employer |
| Defined Contribution Plan Cost Recognized |
| Depreciation |
| Depreciation And Amortization |
| Depreciation Depletion And Amortization |
| Distributable Opra Income |
| Dividends Common Stock Cash |
| Dividends Payable Current |
| Dividends Receivable |
| Due To Affiliate Current |
| Due To Affiliate Noncurrent |
| Earnings Per Share Basic |
| Earnings Per Share Diluted |
| Effective Income Tax Rate Continuing Operations |
| Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate |
| Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate |
| Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities |
| Effective Income Tax Rate Reconciliation Other Adjustments |
| Effective Income Tax Rate Reconciliation State And Local Income Taxes |
| Effect Of Exchange Rate On Cash And Cash Equivalents |
| Effect Of Tax Cuts And Jobs Act Of2017 Increase In Net Income |
| Employee Related Liabilities Current |
| Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized |
| Equity Gain Loss Investments |
| Equity Method Investment Dividends Or Distributions |
| Equity Method Investment Ownership Percentage |
| Equity Method Investments |
| Equity Securities Fv Ni |
| Estimated Liability Sec Matter |
| Excess Net Capital At1500 Percent |
| Excess Tax Benefit From Share Based Compensation Equity Impact |
| Excess Tax Benefit From Share Based Compensation Financing Activities |
| Excess Tax Benefit From Share Based Compensation Operating Activities |
| Exchange Fees |
| Exchange Services And Other Fees |
| Exerciserightappealsettlement |
| Exercise Right Privilege Payable |
| Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings |
| Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases |
| Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements |
| Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value |
| Financial Resources Requirement |
| Finite And Indefinite Lived Intangible Assets Excluding Goodwill Acquired |
| Finite Lived Data Processing Software And Other Asset |
| Finite Lived Intangible Assets Accumulated Amortization |
| Finite Lived Intangible Assets Amortization Expense Next Twelve Months |
| Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year |
| Finite Lived Intangible Assets Amortization Expense Year Five |
| Finite Lived Intangible Assets Amortization Expense Year Four |
| Finite Lived Intangible Assets Amortization Expense Year Six |
| Finite Lived Intangible Assets Amortization Expense Year Three |
| Finite Lived Intangible Assets Amortization Expense Year Two |
| Finite Lived Intangible Assets Gross |
| Finite Lived Intangible Assets Net |
| Finite Lived Software Developmen Twork In Progress |
| Forfeitureof Common Stockfor Paymentof Exerciseof Stock Options |
| Furniture And Fixtures Gross |
| Gain Loss On Sale Of Property Plant Equipment |
| Gain Losson Settlementof Contingent Consideration |
| Gain Loss Related To Litigation Settlement |
| Goodwill |
| Goodwill Acquired During Period |
| Goodwill Foreign Currency Translation Gain Loss |
| Goodwill Impairment Loss |
| Goodwill Written Off Related To Sale Of Business Unit |
| Gross Profit |
| Group Member Equity Interest |
| Impairment Of Investments |
| Income Loss From Continuing Operations Before Income Taxes Domestic |
| Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest |
| Income Loss From Continuing Operations Before Income Taxes Foreign |
| Income Loss From Continuing Operations Before Income Taxes Minority Interest And After Income Loss From Equity Method Investments |
| Income Loss From Equity Method Investments |
| Income Taxes Paid |
| Income Taxes Paid Net |
| Income Taxes Receivable |
| Income Taxes Receivable Fair Value Disclosure |
| Income Tax Expense Benefit |
| Income Tax Expense Ny Advisory Opinion |
| Income Tax Receivable |
| Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance |
| Income Tax Reconciliation Deductions Qualified Production Activities |
| Income Tax Reconciliation Tax Contingencies State And Local |
| Increase Decrease In Access Fees Subject To Fee Based Payment |
| Increase Decrease In Accounts Payable And Accrued Liabilities |
| Increase Decrease In Accounts Receivable |
| Increase Decrease In Accrued Income Taxes Payable |
| Increase Decrease In Contract With Customer Liability |
| Increase Decrease In Deferred Revenue |
| Increase Decrease In Income Taxes |
| Increase Decrease In Income Taxes Receivable |
| Increase Decrease In Marketing Fee Payable |
| Increase Decrease In Marketing Fee Receivable |
| Increase Decrease In Other Current Assets |
| Increase Decrease In Other Operating Assets |
| Increase Decrease In Other Operating Liabilities |
| Increase Decrease In Other Receivables |
| Increase Decrease In Pension And Postretirement Obligations |
| Increase Decrease In Prepaid Deferred Expense And Other Assets |
| Increase Decrease In Prepaid Expense |
| Increase Decrease In Prepaid Expenses Other |
| Increase Decreasein Regulatory Fees Payable |
| Increase Decrease In Regulatory Fees Payable |
| Increase Decrease In Restricted Cash |
| Increase Decrease In Settlement With Appellants |
| Increase Decrease Liabilityfor Uncertaintyin Income Taxes |
| Increase Decrease Liability For Uncertainty In Income Taxes |
| Incremental Common Shares Attributable To Share Based Payment Arrangements |
| Information Technology And Data Processing |
| Intangible Assets Acquired |
| Intangible Assets Disposed |
| Intangible Assets Foreign Currency Translation Gain Loss |
| Intangible Assets Net Excluding Goodwill |
| Interest And Debt Expense |
| Interest Expense |
| Interest Expense Debt |
| Interest Expense Debt Excluding Amortization |
| Interest Income Expense Nonoperating Net |
| Interest Paid Net |
| Investment Income Interest |
| Investment Income Net |
| Investments |
| Investments Fair Value Disclosure |
| Investments In Affiliates Subsidiaries Associates And Joint Ventures |
| Investments In And Advances To Affiliates Balance Principal Amount |
| Labor And Related Expense |
| Land |
| Lease And Rental Expense |
| Liabilities |
| Liabilities And Stockholders Equity |
| Liabilities Current |
| Liabilities Fair Value Disclosure |
| Liabilities Noncurrent |
| Liabilityfor Treasury Shares |
| Liability For Treasury Shares |
| Liability For Uncertain Tax Positions Noncurrent |
| License Costs |
| Licensing Agreements Due Five Years Or More |
| Licensing Agreements Due Next Five Years |
| Limited Partners Contributed Capital |
| Liquidity Payments Expense |
| Liquidity Provider Transaction Fee Sliding Scale Monthly Contract Volume For Reduced Fees Minimum |
| Long Term Debt |
| Long Term Debt Current |
| Long Term Debt Fair Value |
| Long Term Debt Maturities Repayments Of Principal After Year Five |
| Longterm Debt Maturities Repaymentsof Principalafter Year Six |
| Long Term Debt Maturities Repayments Of Principal In Year Five |
| Long Term Debt Maturities Repayments Of Principal In Year Four |
| Longterm Debt Maturities Repaymentsof Principalin Year Six |
| Long Term Debt Maturities Repayments Of Principal In Year Three |
| Long Term Debt Maturities Repayments Of Principal In Year Two |
| Long Term Debt Maturities Repayments Of Principal Remainder Of Fiscal Year |
| Long Term Debt Noncurrent |
| Loss Contingency Accrual At Carrying Value |
| Marketable Securitiesand Cashand Cash Equivalents |
| Marketable Securitiesand Cashand Cash Equivalents Amortized Cost Basis |
| Marketable Securities Current |
| Market Data Fees |
| Market Data Revenue |
| Marketing Advertisingand Travel Expense |
| Marketing Advertising And Travel Expense |
| Marketing Fee Payable Current |
| Marketing Fee Receivable Current |
| Marketing Fees Collectred Through Occ |
| Minimum Net Capital Required1 |
| Minority Interest Change In Redemption Value |
| Minority Interest Ownership Percentage By Noncontrolling Owners |
| Money Market Funds At Carrying Value |
| Net Capital |
| Net Cash Provided By Used In Financing Activities |
| Net Cash Provided By Used In Financing Activities Continuing Operations |
| Net Cash Provided By Used In Investing Activities |
| Net Cash Provided By Used In Investing Activities Continuing Operations |
| Net Cash Provided By Used In Operating Activities |
| Net Cash Provided By Used In Operating Activities Continuing Operations |
| Net Income Loss |
| Net Income Loss Attributable To Noncontrolling Interest |
| Net Income Loss Attributable To Redeemable Noncontrolling Interest |
| Net Income Loss Available To Common Stockholders Basic |
| Net Income Loss Available To Common Stockholders Diluted |
| Noncashor Part Noncash Acquisition Accounts Payablesand Accrued Liabilities Assumed |
| Noncash Or Part Noncash Acquisition Accounts Payables And Accrued Liabilities Assumed |
| Noncash Or Part Noncash Acquisition Accounts Receivable Acquired1 |
| Noncashor Part Noncash Acquisition Deferred Tax Liabilities Assumed |
| Noncash Or Part Noncash Acquisition Deferred Tax Liabilities Assumed |
| Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 |
| Noncashor Part Noncash Acquisition Goodwill Acquired |
| Noncash Or Part Noncash Acquisition Goodwill Acquired |
| Noncash Or Part Noncash Acquisition Intangible Assets Acquired1 |
| Noncash Or Part Noncash Acquisition Investments Acquired1 |
| Noncash Or Part Noncash Acquisition Other Assets Acquired1 |
| Noncash Or Part Noncash Acquisition Other Liabilities Assumed1 |
| Noncashor Part Noncash Acquisition Regulatory Fees Payable Assumed |
| Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 |
| Non Cash Transaction Exercise Right Privilege Payable |
| Noncontrolling Interest Increase From Business Combination |
| Number Of Central Counterparties |
| Number Of Reportable Segments |
| Numberof Trading Venues |
| Occupancy Net |
| Operating Expenses |
| Operating Income Loss |
| Operating Leases And Advertising Obligations Future Amounts Due |
| Operating Leasesand Contractual Obligationsfutureamountsdue |
| Operating Leases Future Minimum Payments Due |
| Operating Leases Future Minimum Payments Dueafter Six Years |
| Operating Leases Future Minimum Payments Due Current |
| Operating Leases Future Minimum Payments Due In Five Years |
| Operating Leases Future Minimum Payments Due In Four Years |
| Operating Leases Future Minimum Payments Duein Six Years |
| Operating Leases Future Minimum Payments Due In Three Years |
| Operating Leases Future Minimum Payments Due In Two Years |
| Operating Leases Future Minimum Payments Remainder Of Fiscal Year |
| Operating Leases Rent Expense Net |
| Operating Loss Carryforwards |
| Operating Loss Carryforwards Valuation Allowance |
| Order Routing |
| Orsa Related Expenses |
| Other Accrued Liabilities Current |
| Other Assets Current |
| Other Assets Miscellaneous Noncurrent |
| Other Assets Noncurrent |
| Other Commitment |
| Other Commitment Dueafter Year Six |
| Other Commitment Due In Fifth Year |
| Other Commitment Due In Fourth Year |
| Other Commitment Due In Next Twelve Months |
| Other Commitment Due In Second Year |
| Other Commitment Duein Sixth Year |
| Other Commitment Due In Third Year |
| Other Commitments Future Minimum Payments Remainder Of Fiscal Year |
| Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Period Increase Decrease |
| Other Comprehensive Income Defined Benefit Plans Tax |
| Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Before Tax Portion Attributable To Parent |
| Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax |
| Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax |
| Other Comprehensive Income Loss Before Tax Portion Attributable To Parent |
| Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax |
| Other Comprehensive Income Loss Net Of Tax |
| Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest |
| Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent |
| Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax |
| Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax |
| Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax |
| Other Comprehensive Income Loss Tax Portion Attributable To Parent1 |
| Other Cost And Expense Operating |
| Other Deferred Costs Net |
| Other Depreciation And Amortization |
| Other Expenses |
| Other Liabilities Current |
| Other Liabilities Noncurrent |
| Other Nonoperating Income Expense |
| Other Prepaid Expense Current |
| Other Sales Revenue Net |
| Other Stock Purchases |
| Paymentfor Contingent Consideration Liability |
| Paymentfor Contingent Consideration Liability Investing Activities |
| Payment Of Special Dividend |
| Payments For Proceeds From Businesses And Interest In Affiliates |
| Payments For Proceeds From Investments |
| Payments For Proceeds From Other Investing Activities |
| Payments For Proceeds From Productive Assets |
| Payments For Repurchase Of Common Stock |
| Payments For Restructuring |
| Payments Of Capital Distribution |
| Payments Of Debt Issuance Costs |
| Payments Of Dividends |
| Payments Of Dividends Common Stock |
| Payments Of Exercise Right Privilege Payable |
| Payments Of Ordinary Dividends |
| Payments Related To Tax Withholding For Share Based Compensation |
| Payments To Acquire Available For Sale Securities |
| Payments To Acquire Available For Sale Securities Debt |
| Payments To Acquire Businesses Gross |
| Payments To Acquire Businesses Net Of Cash Acquired |
| Payments To Acquire Interest In Subsidiaries And Affiliates |
| Payments To Acquire Other Investments |
| Payments To Acquire Property Plant And Equipment |
| Pension And Other Postretirement Benefit Contributions |
| Per Share Payment Of Special Dividend |
| Plan Of Merger Approval |
| Postemployment Benefits Liability Current |
| Post Retirement Medical Benefits Current |
| Post Retirement Medical Benefits Noncurrent |
| Preferred Stock Dividends And Other Adjustments |
| Preferred Stock Par Or Stated Value Per Share |
| Preferred Stock Shares Authorized |
| Preferred Stock Shares Issued |
| Preferred Stock Shares Outstanding |
| Preferred Stock Value |
| Prior Period Fees Recognized In Current Period |
| Proceeds From Issuance Initial Public Offering |
| Proceeds From Issuance Of Common Stock |
| Proceeds From Issuance Of Long Term Debt |
| Proceeds From Legal Settlements |
| Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities |
| Proceeds From Stock Options Exercised |
| Professional Fees |
| Profit Loss |
| Property Plantand Equipment Excluding Land Net |
| Property Plant And Equipment Excluding Land Net |
| Property Plant And Equipment Gross |
| Property Plant And Equipment Net |
| Purchase Of Restricted Stock From Employees |
| Purchase Of Restricted Stock From Employees Cash Flow Impact |
| Purchase Of Unrestrcited Common Stock |
| Purchase Of Unrestricted Stock From Employees Cash Flow Impact |
| Receiable Due From Orsa |
| Receivable Due From Cbsx |
| Receivable Due From Occ |
| Receivable Due From Opra |
| Redeemable Noncontrolling Interest Equity Carrying Amount |
| Regulatory Fees |
| Regulatory Fees Payable Current |
| Regulatory Fees Revenue |
| Repayments Of Long Term Debt |
| Reserveof Notes Receivable |
| Restricted Cash And Cash Equivalents At Carrying Value |
| Restructuring Charges |
| Restructuring Reserve |
| Restructuring Reserve Current |
| Retained Earnings Accumulated Deficit |
| Revenuefrom Contractwith Customer Excluding Assessed Tax |
| Revenue From Contract With Customer Including Assessed Tax |
| Revenues |
| Routingand Clearing Expenses |
| Routing And Clearing Expenses |
| Royalty Expense |
| Sale Of Stock Price Per Share |
| Section31 Fees Payable Fair Value Disclosure |
| Settlement Group A |
| Settlement Group B |
| Share Based Compensation |
| Share Based Compensation Arrangement By Share Based Payment Award Accelerated Compensation Cost |
| Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value |
| Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate |
| Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate |
| Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Authorized |
| Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized |
| Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 |
| Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number |
| Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price |
| Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Remaining Contractual Term |
| Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price |
| Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross |
| Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value |
| Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares |
| Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Options Forfeited Number Of Shares |
| Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Options Forfeited Weighted Average Grant Date Fair Value |
| Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value |
| Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value |
| Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number |
| Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price |
| Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value |
| Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number |
| Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price |
| Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Number Of Shares |
| Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Weighted Average Grant Date Fair Value |
| Sharebased Compensation Arrangementby Sharebased Payment Awards Options Nonvested Grantsin Period Gross |
| Sharebased Compensation Arrangementby Sharebased Payments Awards Grantsin Period Aggregate Intrinsic Value |
| Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price |
| Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price |
| Share Based Conpensationforfeiture Rate |
| Shares Float |
| Stockholders Equity |
| Stockholders Equity Including Portion Attributable To Noncontrolling Interest |
| Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures |
| Stock Issued During Period Shares Share Based Compensation |
| Stock Issued During Period Shares Stock Options Exercised |
| Stock Issued During Period Value Acquisitions |
| Stock Issued During Period Value New Issues |
| Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures |
| Stock Issued During Period Value Share Based Compensation |
| Stock Repurchased During Period Shares |
| Stock Repurchased During Period Value |
| Stock Repurchase Program Authorized Amount |
| Stock Repurchase Program Authorized Amount1 |
| Stock Repurchase Program Remaining Authorized Repurchase Amount1 |
| Stock Repurchase Program Total Acquired |
| Swap Execution Facility Operating Expensesfor Determinationof Resource Adequacy |
| Swap Execution Facility Six Month Operating Expensesfor Determinationof Resource Adequacy |
| Tax Cuts And Jobs Act Of2017 Incomplete Accounting Change In Tax Rate Deferred Tax Liability Provisional Income Tax Benefit |
| Temporary Equity Accretion To Redemption Value |
| Temporary Equity Accretion To Redemption Value Adjustment |
| Tender Offer For Common Stock |
| Total Operating Leases And Advertising Obligations Current |
| Total Operating Leases And Advertising Obligations Due In Two Years |
| Total Operating Leases And Advertising Obligations Due Within Five Years |
| Total Operating Leases And Advertising Obligations Due Within Four Years |
| Total Operating Leases And Advertising Obligations Due Within Three Years |
| Total Operating Leasesand Contractual Obligations Current |
| Total Operating Leasesand Contractual Obligationsdueintwoyears |
| Total Operating Leasesand Contractual Obligationsduewithinfiveyears |
| Total Operating Leasesand Contractual Obligationsduewithinfouryears |
| Total Operating Leasesand Contractual Obligationsduewithinthreeyears |
| Trading Securities |
| Trading Volume Incentives |
| Transaction And Other Fees Collected Through Occ |
| Transaction Fees |
| Travel And Entertainment Expense |
| Treasury Shares Acquired Value |
| Treasury Stock Acquired Average Cost Per Share |
| Treasury Stock Acquiredcost Per Share |
| Treasury Stock Acquired Cost Per Share |
| Treasury Stock Common Value |
| Treasury Stock Shares |
| Treasury Stock Shares Acquired |
| Treasury Stock Value |
| Treasury Stock Value Acquired Cost Method |
| Undistributed Earnings Allocated To Participating Securities |
| Undistributed Earnings Loss Allocated To Participating Securities Basic |
| Unrecognized Tax Benefits |
| Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions |
| Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities |
| Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued |
| Unrecognized Tax Benefits Income Tax Penalties And Interest Expense |
| Unrecognized Tax Benefits Increases Resulting From Acquisition |
| Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions |
| Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions |
| Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations |
| Unrecognized Tax Benefits That Would Impact Effective Tax Rate |
| Veba Contributions |
| Weighted Average Number Diluted Shares Outstanding Adjustment |
| Weighted Average Number Of Diluted Shares Outstanding |
| Weighted Average Number Of Shares Outstanding Basic |
| Weighted Average Numberof Shares Outstanding Diluted Before Effectof Incremental Common Shares Attributableto Participating Nonvested Shareswith Nonforfeitable Dividend Rights |
