0001001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 1001002 - Statement - Condensed Consolidated Statements of Financial Condition link:presentationLink link:calculationLink link:definitionLink 1002003 - Statement - Condensed Consolidated Statements of Financial Condition (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 1003004 - Statement - Condensed Consolidated Statements of Comprehensive Income (Loss) link:presentationLink link:calculationLink link:definitionLink 1004005 - Statement - Condensed Consolidated Statements of Changes in Equity link:presentationLink link:calculationLink link:definitionLink 1005006 - Statement - Condensed Consolidated Statements of Changes in Equity (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 1006007 - Statement - Condensed Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 2101101 - Disclosure - Organization and Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 2402401 - Disclosure - Organization and Basis of Presentation (Details) link:presentationLink link:calculationLink link:definitionLink 2103102 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 2204201 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 2105103 - Disclosure - Earnings per Share link:presentationLink link:calculationLink link:definitionLink 2306301 - Disclosure - Earnings per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 2407402 - Disclosure - Earnings per Share - Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 2408403 - Disclosure - Earnings per Share - Basic (Details) link:presentationLink link:calculationLink link:definitionLink 2409404 - Disclosure - Earnings per Share - Diluted (Details) link:presentationLink link:calculationLink link:definitionLink 2110104 - Disclosure - Tax Receivable Agreements link:presentationLink link:calculationLink link:definitionLink 2411405 - Disclosure - Tax Receivable Agreements (Details) link:presentationLink link:calculationLink link:definitionLink 2112105 - Disclosure - Goodwill and Intangible Assets link:presentationLink link:calculationLink link:definitionLink 2313302 - Disclosure - Goodwill and Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 2414406 - Disclosure - Goodwill and Intangible Assets - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2415407 - Disclosure - Goodwill and Intangible Assets - Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 2416408 - Disclosure - Goodwill and Intangible Assets - Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 2416408 - Disclosure - Goodwill and Intangible Assets - Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 2417409 - Disclosure - Goodwill and Intangible Assets - Expects Amortization Expense (Details) link:presentationLink link:calculationLink link:definitionLink 2118106 - Disclosure - Receivables from/Payables to Broker-Dealers and Clearing Organizations link:presentationLink link:calculationLink link:definitionLink 2319303 - Disclosure - Receivables from/Payables to Broker-Dealers and Clearing Organizations (Tables) link:presentationLink link:calculationLink link:definitionLink 2420410 - Disclosure - Receivables from/Payables to Broker-Dealers and Clearing Organizations (Details) link:presentationLink link:calculationLink link:definitionLink 2121107 - Disclosure - Collateralized Transactions link:presentationLink link:calculationLink link:definitionLink 2322304 - Disclosure - Collateralized Transactions (Tables) link:presentationLink link:calculationLink link:definitionLink 2423411 - Disclosure - Collateralized Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 2124108 - Disclosure - Borrowings link:presentationLink link:calculationLink link:definitionLink 2325305 - Disclosure - Borrowings (Tables) link:presentationLink link:calculationLink link:definitionLink 2426412 - Disclosure - Borrowings - Short-term Borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 2427413 - Disclosure - Borrowings - Broker-Dealer Credit Facilities, Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2428414 - Disclosure - Borrowings - Broker-Dealer Credit Facilities Carrying Values, Net (Details) link:presentationLink link:calculationLink link:definitionLink 2429415 - Disclosure - Borrowings - Interest Expense on Broker-Dealer Facilities (Details) link:presentationLink link:calculationLink link:definitionLink 2430416 - Disclosure - Borrowings - Short-Term Bank Loans (Details) link:presentationLink link:calculationLink link:definitionLink 2431417 - Disclosure - Borrowings - Short-Term Credit Facilities (Details) link:presentationLink link:calculationLink link:definitionLink 2432418 - Disclosure - Borrowings - Long-Term Borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 2433419 - Disclosure - Borrowings - Credit Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 2434420 - Disclosure - Borrowings - Senior Secured Second Lien Notes (Details) link:presentationLink link:calculationLink link:definitionLink 2435421 - Disclosure - Borrowings - SBI Bonds (Details) link:presentationLink link:calculationLink link:definitionLink 2436422 - Disclosure - Borrowings - Future Minimum Principal Payments (Details) link:presentationLink link:calculationLink link:definitionLink 2137109 - Disclosure - Financial Assets and Liabilities link:presentationLink link:calculationLink link:definitionLink 2338306 - Disclosure - Financial Assets and Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 2439423 - Disclosure - Financial Assets and Liabilities - Measured on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 2440424 - Disclosure - Financial Assets and Liabilities - Fair Value Inputs (Details) link:presentationLink link:calculationLink link:definitionLink 2441425 - Disclosure - Financial Assets and Liabilities - Level 3 financial instruments (Details) link:presentationLink link:calculationLink link:definitionLink 2442426 - Disclosure - Financial Assets and Liabilities - Not Measured at Fair Value on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 2443427 - Disclosure - Financial Assets and Liabilities - Netting of Certain Financial Assets (Details) link:presentationLink link:calculationLink link:definitionLink 2443427 - Disclosure - Financial Assets and Liabilities - Netting of Certain Financial Assets (Details) link:presentationLink link:calculationLink link:definitionLink 2444428 - Disclosure - Financial Assets and Liabilities - Netting of Certain Financial Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2444428 - Disclosure - Financial Assets and Liabilities - Netting of Certain Financial Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2445429 - Disclosure - Financial Assets and Liabilities - Gross Obligations For Securities Lending Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 2146110 - Disclosure - Derivative Instruments link:presentationLink link:calculationLink link:definitionLink 2347307 - Disclosure - Derivative Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 2448430 - Disclosure - Derivative Instruments - Fair Value of Derivative Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 2449431 - Disclosure - Derivative Instruments - Gain (Loss) From Derivative Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 2150111 - Disclosure - Variable Interest Entities link:presentationLink link:calculationLink link:definitionLink 2351308 - Disclosure - Variable Interest Entities (Tables) link:presentationLink link:calculationLink link:definitionLink 2452432 - Disclosure - Variable Interest Entities- Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 2453433 - Disclosure - Variable Interest Entities-nonconsolidated VIEs (Details) link:presentationLink link:calculationLink link:definitionLink 2154112 - Disclosure - Revenues from Contracts with Customers link:presentationLink link:calculationLink link:definitionLink 2355309 - Disclosure - Revenues from Contracts with Customers (Tables) link:presentationLink link:calculationLink link:definitionLink 2456434 - Disclosure - Revenues from Contracts with Customers (Details) link:presentationLink link:calculationLink link:definitionLink 2157113 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 2458435 - Disclosure - Income Taxes - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 2159114 - Disclosure - Commitments, Contingencies and Guarantees link:presentationLink link:calculationLink link:definitionLink 2460436 - Disclosure - Commitments, Contingencies and Guarantees (Details) link:presentationLink link:calculationLink link:definitionLink 2161115 - Disclosure - Leases link:presentationLink link:calculationLink link:definitionLink 2362310 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 2463437 - Disclosure - Leases - Lease Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2464438 - Disclosure - Leases - Lease Term and Discount Rate (Details) link:presentationLink link:calculationLink link:definitionLink 2465439 - Disclosure - Leases - Components of Lease Expense (Details) link:presentationLink link:calculationLink link:definitionLink 2466440 - Disclosure - Leases - Future Minimum Lease Payments (Details) link:presentationLink link:calculationLink link:definitionLink 2466440 - Disclosure - Leases - Future Minimum Lease Payments (Details) link:presentationLink link:calculationLink link:definitionLink 2167116 - Disclosure - Cash link:presentationLink link:calculationLink link:definitionLink 2368311 - Disclosure - Cash (Tables) link:presentationLink link:calculationLink link:definitionLink 2469441 - Disclosure - Cash (Details) link:presentationLink link:calculationLink link:definitionLink 2170117 - Disclosure - Capital Structure link:presentationLink link:calculationLink link:definitionLink 2371312 - Disclosure - Capital Structure (Tables) link:presentationLink link:calculationLink link:definitionLink 2472442 - Disclosure - Capital Structure - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 2473443 - Disclosure - Capital Structure - Amended and Restated 2015 Management Incentive Plan (Details) link:presentationLink link:calculationLink link:definitionLink 2474444 - Disclosure - Capital Structure - Amended and Restated Investment Technology Group, Inc. 2007 Omnibus Equity Compensation Plan (Details) link:presentationLink link:calculationLink link:definitionLink 2475445 - Disclosure - Capital Structure - Share Repurchase Program (Details) link:presentationLink link:calculationLink link:definitionLink 2476446 - Disclosure - Capital Structure - Employee Exchanges (Details) link:presentationLink link:calculationLink link:definitionLink 2477447 - Disclosure - Capital Structure - Warrants (Details) link:presentationLink link:calculationLink link:definitionLink 2478448 - Disclosure - Capital Structure - Schedule of Accumulated Other Comprehensive Income (Details) link:presentationLink link:calculationLink link:definitionLink 2179118 - Disclosure - Share-based Compensation link:presentationLink link:calculationLink link:definitionLink 2380313 - Disclosure - Share-based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 2481449 - Disclosure - Share-based Compensation - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2482450 - Disclosure - Share-based Compensation - Summary of Activity in Options (Details) link:presentationLink link:calculationLink link:definitionLink 2483451 - Disclosure - Share-based Compensation - Summary of Activity in RSUs and RSAs (Details) link:presentationLink link:calculationLink link:definitionLink 2184119 - Disclosure - Regulatory Requirement link:presentationLink link:calculationLink link:definitionLink 2385314 - Disclosure - Regulatory Requirement (Tables) link:presentationLink link:calculationLink link:definitionLink 2486452 - Disclosure - Regulatory Requirement - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2487453 - Disclosure - Regulatory Requirement - Regulatory Capital and Capital Requirements (Details) link:presentationLink link:calculationLink link:definitionLink 2188120 - Disclosure - Geographic Information and Business Segments link:presentationLink link:calculationLink link:definitionLink 2389315 - Disclosure - Geographic Information and Business Segments (Tables) link:presentationLink link:calculationLink link:definitionLink 2490454 - Disclosure - Geographic Information and Business Segments - Revenues by Geographic Area (Details) link:presentationLink link:calculationLink link:definitionLink 2491455 - Disclosure - Geographic Information and Business Segments - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2492456 - Disclosure - Geographic Information and Business Segments - Segments (Details) link:presentationLink link:calculationLink link:definitionLink 2193121 - Disclosure - Related Party Transactions link:presentationLink link:calculationLink link:definitionLink 2494457 - Disclosure - Related Party Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 2195122 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 2496458 - Disclosure - Subsequent Events (Details) link:presentationLink link:calculationLink link:definitionLink