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Disclosure - Revenue From Contracts With Customers (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 240104005 - Disclosure - Revenue From Contracts With Customers (Remaining Performance Obligation) (Details) link:presentationLink link:calculationLink link:definitionLink 240104005 - Disclosure - Revenue From Contracts With Customers (Remaining Performance Obligation) (Details) link:presentationLink link:calculationLink link:definitionLink 210111004 - Disclosure - Acquisitions and Divestiture link:presentationLink link:calculationLink link:definitionLink 230123002 - Disclosure - Acquisitions and Divestiture (Tables) link:presentationLink link:calculationLink link:definitionLink 240134006 - Disclosure - Acquisitions and Divestiture (2021 and 2020 Acquisition) (Details) link:presentationLink link:calculationLink link:definitionLink 240144007 - Disclosure - Acquisitions and Divestiture (2019 Divestiture and Acquisition) (Details) link:presentationLink link:calculationLink link:definitionLink 240154008 - Disclosure - Acquisitions and Divestiture (Intangible Assets) (Details) link:presentationLink link:calculationLink link:definitionLink 210161005 - Disclosure - Goodwill and Acquired Intangible Assets link:presentationLink link:calculationLink link:definitionLink 230173003 - Disclosure - Goodwill and Acquired Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 240184009 - Disclosure - Goodwill and Acquired Intangible Assets (Schedule of Changes in Goodwill) (Details) link:presentationLink link:calculationLink link:definitionLink 240194010 - Disclosure - Goodwill and Acquired Intangible Assets (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 240204011 - Disclosure - Goodwill and Acquired Intangible Assets (Finite-Lived and Indefinite-Lived Intangible Assets) (Details) link:presentationLink link:calculationLink link:definitionLink 240204011 - Disclosure - Goodwill and Acquired Intangible Assets (Finite-Lived and Indefinite-Lived Intangible Assets) (Details) link:presentationLink link:calculationLink link:definitionLink 240214012 - Disclosure - Goodwill and Acquired Intangible Assets (Estimated Future Amortization Expense) (Details) link:presentationLink link:calculationLink link:definitionLink 210221006 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 230233004 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 240244013 - Disclosure - Investments (Schedule of Investments) (Details) link:presentationLink link:calculationLink link:definitionLink 240254014 - Disclosure - Investments (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 210261007 - Disclosure - Property and Equipment, net link:presentationLink link:calculationLink link:definitionLink 230273005 - Disclosure - Property and Equipment, net (Tables) link:presentationLink link:calculationLink link:definitionLink 240284015 - Disclosure - Property and Equipment, net (Schedule of Property and Equipment, Net) (Details) link:presentationLink link:calculationLink link:definitionLink 240294016 - Disclosure - Property and Equipment, net (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 210301008 - Disclosure - Deferred Revenue link:presentationLink link:calculationLink link:definitionLink 230313006 - Disclosure - Deferred Revenue (Tables) link:presentationLink link:calculationLink link:definitionLink 240324017 - Disclosure - Deferred Revenue (Changes in Deferred Revenue) (Details) link:presentationLink link:calculationLink link:definitionLink 240334018 - Disclosure - Deferred Revenue (Estimated Deferred Revenue) (Details) link:presentationLink link:calculationLink link:definitionLink 210341009 - Disclosure - Debt Obligations link:presentationLink link:calculationLink link:definitionLink 230353007 - Disclosure - Debt Obligations (Tables) link:presentationLink link:calculationLink link:definitionLink 240364019 - Disclosure - Debt Obligations (Changes in Debt Obligations) (Details) link:presentationLink link:calculationLink link:definitionLink 240374020 - 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Disclosure - Debt Obligations (0.875% Senior Unsecured Notes Due 2030) (Details) link:presentationLink link:calculationLink link:definitionLink 240454028 - Disclosure - Debt Obligations (3.25% Senior Unsecured Notes Due 2050) (Details) link:presentationLink link:calculationLink link:definitionLink 240464029 - Disclosure - Debt Obligations (Senior Unsecured Notes Due 2022, 2031 and 2040) (Details) link:presentationLink link:calculationLink link:definitionLink 240474030 - Disclosure - Debt Obligations (Credit Facilities) (Details) link:presentationLink link:calculationLink link:definitionLink 240484031 - Disclosure - Debt Obligations (Other Credit Facilities) (Details) link:presentationLink link:calculationLink link:definitionLink 210491010 - Disclosure - Retirement Plans link:presentationLink link:calculationLink link:definitionLink 230503008 - Disclosure - Retirement Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 240514032 - Disclosure - Retirement Plans (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 240524033 - Disclosure - Retirement Plans (Schedule of Expected Benefit Payments) (Details) link:presentationLink link:calculationLink link:definitionLink 210531011 - Disclosure - Share-Based Compensation link:presentationLink link:calculationLink link:definitionLink 230543009 - Disclosure - Share-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 240554034 - Disclosure - Share-Based Compensation (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 240564035 - Disclosure - Share-Based Compensation (Summary of Share-Based Compensation Expense) (Details) link:presentationLink link:calculationLink link:definitionLink 240574036 - Disclosure - Share-Based Compensation (Summary of Restricted Stock Activity) (Details) link:presentationLink link:calculationLink link:definitionLink 240584037 - Disclosure - Share-Based Compensation (Schedule of Weighted- Average Assumptions Used to Determine Weighted-Average Fair Values) (Details) link:presentationLink link:calculationLink link:definitionLink 240594038 - 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Disclosure - Clearing Operations link:presentationLink link:calculationLink link:definitionLink 230753013 - Disclosure - Clearing Operations (Tables) link:presentationLink link:calculationLink link:definitionLink 240764047 - Disclosure - Clearing Operations (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 240774048 - Disclosure - Clearing Operations (Schedule of Clearing Member Default Fund Contributions And Margin Deposits) (Details) link:presentationLink link:calculationLink link:definitionLink 240784049 - Disclosure - Clearing Operations (Investment Policy) (Details) link:presentationLink link:calculationLink link:definitionLink 240794050 - Disclosure - Clearing Operations (Schedule of Derivative Contracts) (Details) link:presentationLink link:calculationLink link:definitionLink 210801016 - Disclosure - Leases link:presentationLink link:calculationLink link:definitionLink 230813014 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 240824051 - 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Disclosure - Income Taxes (Reconciliation of Unrecognized Tax Benefits) (Details) link:presentationLink link:calculationLink link:definitionLink 210971018 - Disclosure - Commitments, Contingencies and Guarantees link:presentationLink link:calculationLink link:definitionLink 240984064 - Disclosure - Commitments, Contingencies and Guarantees (Details) link:presentationLink link:calculationLink link:definitionLink 210991019 - Disclosure - Business Segments link:presentationLink link:calculationLink link:definitionLink 231003016 - Disclosure - Business Segments (Tables) link:presentationLink link:calculationLink link:definitionLink 241014065 - Disclosure - Business Segments (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 241024066 - Disclosure - Business Segments (Schedule of Operating Segments) (Details) link:presentationLink link:calculationLink link:definitionLink 241034067 - Disclosure - Business Segments (Corporate Items) (Details) link:presentationLink link:calculationLink link:definitionLink 241044068 - 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