0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Condensed Consolidated Statements of Financial Condition (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Condensed Consolidated Statements of Financial Condition (Unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Condensed Consolidated Statements of Changes in Equity (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Condensed Consolidated Statements of Changes in Equity (Unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - Organization and Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Sale of RFQ-hub link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Earnings per Share link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Tax Receivable Agreements link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Goodwill and Intangible Assets link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Receivables from/Payables to Broker-Dealers and Clearing Organizations link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Collateralized Transactions link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Borrowings link:presentationLink link:calculationLink link:definitionLink 9952166 - 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Disclosure - Goodwill and Intangible Assets - Expects Amortization Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Receivables from/Payables to Broker-Dealers and Clearing Organizations (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Receivables from/Payables to Broker-Dealers and Clearing Organizations - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Collateralized Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Borrowings - Schedule of Short-term Borrowings, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Borrowings - Broker-Dealer Credit Facilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Borrowings - Schedule of Broker-Dealer Credit Facilities Carrying Values, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Borrowings - Schedule of Interest Expense on Broker-Dealer Facilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Borrowings - Short-Term Bank Loans (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Borrowings - Schedule of Prime Brokerage Credit Facilities, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Borrowings - Prime Brokerage Credit Facilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Borrowings - Schedule of Long-Term Borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Borrowings - Credit Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Borrowings - Senior Secured First Lien Notes (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - 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Disclosure - Financial Assets and Liabilities - Netting of Certain Financial Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Financial Assets and Liabilities - Netting of Certain Financial Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - Financial Assets and Liabilities - Netting of Certain Financial Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - Financial Assets and Liabilities - Gross Obligations For Securities Lending Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - Digital Assets Held - Schedule of Digital Assets Held (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - Digital Assets Held - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - Derivative Instruments - Fair Value of Derivative Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - Derivative Instruments - Gain (Loss) From Derivative Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955567 - Disclosure - Variable Interest Entities - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955568 - Disclosure - Variable Interest Entities - Non Consolidated VIEs (Details) link:presentationLink link:calculationLink link:definitionLink 9955569 - Disclosure - Revenue from Contract with Customers - Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - Revenue from Contract with Customers - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955571 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955572 - Disclosure - Commitments, Contingencies and Guarantees (Details) link:presentationLink link:calculationLink link:definitionLink 9955573 - Disclosure - Leases - Lease Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955574 - Disclosure - Leases - Lease Term and Discount Rate (Details) link:presentationLink link:calculationLink link:definitionLink 9955575 - Disclosure - Leases - Components of Lease Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955576 - Disclosure - Leases - Future Minimum Lease Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955576 - Disclosure - Leases - Future Minimum Lease Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955577 - Disclosure - Cash (Details) link:presentationLink link:calculationLink link:definitionLink 9955578 - Disclosure - Capital Structure - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955579 - Disclosure - Capital Structure - Amended and Restated 2015 Management Incentive Plan (Details) link:presentationLink link:calculationLink link:definitionLink 9955580 - 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