0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 0000002 - Document - Audit Information link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Consolidated Statements of Income link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Consolidated Statements of Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Consolidated Statements of Changes in Equity and Redeemable Non-Controlling Interest link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - 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Disclosure - Earnings Per Common Share link:presentationLink link:calculationLink link:definitionLink 9952177 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Acquisitions and Divestitures (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Revenue Recognition (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Deferred Revenue (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Short-Term and Long-Term Restricted Cash, Cash Equivalents, and Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Property and Equipment (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Goodwill and Other Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Share-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Clearing Operations (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Pension and Other Benefit Programs (Tables) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Segment Reporting (Tables) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Earnings Per Common Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Description of Business (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Summary of Significant Accounting Policies - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Summary of Significant Accounting Policies - Schedule of Reconciliation of Allowance for Doubtful Accounts (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Acquisitions and Divestitures - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Acquisitions and Divestitures - Schedule of Estimated Net Fair Value of the Consideration Transferred (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Acquisitions and Divestitures - Schedule of The Preliminary Purchase Price Allocation (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Acquisitions and Divestitures - Schedule of Components of the Preliminary Intangible Assets Associated with the Acquisition (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Acquisitions and Divestitures - Business Acquisition Pro Forma Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Revenue Recognition - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Revenue Recognition - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - 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Schedule of Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Property and Equipment - Schedule of Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Property and Equipment - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Goodwill and Other Intangible Assets - Schedule of Goodwill Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Goodwill and Other Intangible Assets - Schedule of Other Intangible Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Goodwill and Other Intangible Assets - Schedule of Intangible Assets and Related Accumulated Amortization (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Goodwill and Other Intangible Assets - 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Disclosure - Share-Based Compensation - Details of Stock Options (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - Share-Based Compensation - Schedule of Stock Options Exercised (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Share-Based Compensation - Valuation Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - Share-Based Compensation - Nonvested Restricted Stock Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - Equity - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - Equity - Schedule of Repurchased Shares (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - Equity - Schedule of Dividends Declared (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - Equity - Accumulated Other Comprehensive Income (Loss) (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - Income Taxes - Income Before Income Taxes and Income Tax Provision (Details) link:presentationLink link:calculationLink link:definitionLink 9955567 - Disclosure - Income Taxes - Reconciliation of US Statutory Federal Income Tax Rate To Effective Income Tax Rate (Details) link:presentationLink link:calculationLink link:definitionLink 9955568 - Disclosure - Income Taxes - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955569 - Disclosure - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - Income Taxes - Deferred Income Tax Valuation Allowance Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 9955571 - Disclosure - Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 9955572 - Disclosure - Clearing Operations - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955573 - Disclosure - Clearing Operations - Guaranty Fund Contributions (Details) link:presentationLink link:calculationLink link:definitionLink 9955574 - Disclosure - Clearing Operations - Cash and Cash Equivalents Deposits (Details) link:presentationLink link:calculationLink link:definitionLink 9955575 - Disclosure - Clearing Operations - Separate Cash Accounts (Details) link:presentationLink link:calculationLink link:definitionLink 9955576 - Disclosure - Clearing Operations - Assets Pledged by Clearing Members (Details) link:presentationLink link:calculationLink link:definitionLink 9955577 - Disclosure - Leases - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955578 - Disclosure - Leases - Operating Lease Details (Details) link:presentationLink link:calculationLink link:definitionLink 9955579 - Disclosure - Leases - Maturities of Operating Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955579 - Disclosure - Leases - Maturities of Operating Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955580 - Disclosure - Leases - Supplemental Cash Flow Information and Non-Cash Activity Related to Operating Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955581 - Disclosure - Commitments and Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 9955582 - Disclosure - Pension and Other Benefit Programs - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955583 - Disclosure - Pension and Other Benefit Programs - Fair Value Of Plan Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955584 - Disclosure - Pension and Other Benefit Programs - Benefit Obligations and Fair Value of Plan Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955585 - Disclosure - Pension and Other Benefit Programs - Components of Pension Plan Expense (Benefit) (Details) link:presentationLink link:calculationLink link:definitionLink 9955586 - Disclosure - Pension and Other Benefit Programs - Projected Plan Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955587 - Disclosure - Pension and Other Benefit Programs - Change to US Operations SERP Benefit Obligation (Details) link:presentationLink link:calculationLink link:definitionLink 9955588 - Disclosure - Pension and Other Benefit Programs - Weighted Average Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9955589 - Disclosure - Pension and Other Benefit Programs - Benefit Obligation, Benefits Paid During the Period, Accrued Benefit Cost (Details) link:presentationLink link:calculationLink link:definitionLink 9955590 - Disclosure - Pension and Other Benefit Programs - Payments Projected Based on Actuarial Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9955591 - Disclosure - Pension and Other Benefit Programs - Effect on Accumulated Other Comprehensive Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955592 - Disclosure - Fair Value Measurements - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955593 - Disclosure - Fair Value Measurements - Schedule of Carrying Values and Estimated Fair Values of Debt Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955594 - Disclosure - Segment Reporting - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955595 - Disclosure - Segment Reporting - Schedule of Segment Reporting Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955596 - Disclosure - Segment Reporting - Schedule of Segment Information by Geography (Details) link:presentationLink link:calculationLink link:definitionLink 9955597 - Disclosure - Earnings Per Common Share - Reconciliation of Basic and Diluted Earnings Per Common Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955598 - Disclosure - Earnings Per Common Share - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink