75000 - Document - Cover Page
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75010 - Statement - Condensed Consolidated Statements of Financial Condition (Unaudited)
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75020 - Statement - Condensed Consolidated Statements of Financial Condition (Unaudited) (Parenthetical)
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75030 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited)
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75040 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited) 2
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75050 - Statement - Condensed Consolidated Statements of Cash Flows (Alternative))
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75060 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
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75070 - Statement - Condensed Consolidated Statements of Changes in Equity (Unaudited)
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75080 - Statement - Condensed Consolidated Statements of Changes in Equity (Unaudited) (Parenthetical)
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995455 - Disclosure - Organization of Business
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995465 - Disclosure - Significant Accounting Policies
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995475 - Disclosure - Trading Activities And Related Risks
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995485 - Disclosure - Equity And Earnings Per Share
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995495 - Disclosure - Comprehensive Income
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995505 - Disclosure - Financial Assets And Financial Liabilities
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995515 - Disclosure - Collateralized Transactions
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995525 - Disclosure - Revenue From Contracts With Customers
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995535 - Disclosure - Leases (Undiscounted Cash Flows of Operating Lease) (Details) (Alternate)
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995545 - Disclosure - Other Income
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995555 - Disclosure - Employee Incentive Plans
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995565 - Disclosure - Income Taxes
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995575 - Disclosure - Leases
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995585 - Disclosure - Commitments, Contingencies And Guarantees
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995595 - Disclosure - Segment Reporting And Geographic Information
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995605 - Disclosure - Regulatory Requirements
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995615 - Disclosure - Related Party Transactions
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995625 - Disclosure - Subsequent Events
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995635 - Disclosure - Significant Accounting Policies (Policies)
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995645 - Disclosure - Significant Accounting Policies (Tables)
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995655 - Disclosure - Equity And Earnings Per Share (Tables)
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995665 - Disclosure - Comprehensive Income (Tables)
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995675 - Disclosure - Financial Assets And Financial Liabilities (Tables)
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995685 - Disclosure - Collateralized Transactions (Tables)
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995695 - Disclosure - Revenue From Contracts With Customers (Tables)
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995705 - Disclosure - Other Income (Tables)
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995715 - Disclosure - Employee Incentive Plans (Tables)
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995725 - Disclosure - Leases (Tables)
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995735 - Disclosure - Segment Reporting And Geographic Information (Tables)
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995745 - Disclosure - Regulatory Requirements (Tables)
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995755 - Disclosure - Related Party Transactions (Tables)
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995765 - Disclosure - Organization of Business (Details)
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995775 - Disclosure - Significant Accounting Policies (Narrative) (Details)
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995785 - Disclosure - Significant Accounting Policies (Schedule Of Securities Segregated For Regulatory Purposes) (Details)
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995795 - Disclosure - Significant Accounting Policies (Components Of Investments) (Details)
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995805 - Disclosure - Equity And Earnings Per Share (Narrative) (Details)
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995815 - Disclosure - Equity And Earnings Per Share (IBG LLC Ownership of Member Interests) (Details)
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995825 - Disclosure - Equity And Earnings Per Share (Diluted Table) (Details)
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995835 - Disclosure - Equity And Earnings Per Share (Schedule Of Authorized, Issued And Outstanding Shares) (Details)
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995845 - Disclosure - Equity And Earnings Per Share (Basic Table) (Details)
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995855 - Disclosure - Comprehensive Income (Details)
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995865 - Disclosure - Financial Assets And Financial Liabilities (Narrative) (Details)
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995875 - Disclosure - Financial Assets And Financial Liabilities (Fair Value Table) (Details)
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995885 - Disclosure - Financial Assets And Financial Liabilities (Netting of Financial Assets) (Details)
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995895 - Disclosure - Financial Assets And Financial Liabilities (Netting of Financial Liabilities) (Details)
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995905 - Disclosure - Financial Assets and Financial Liabilities - Schedule Of Netting of Financial Assets (Parenthetical) (Details)
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995915 - Disclosure - Financial Assets And Financial Liabilities (Financial Assets and Liabilities Not Measured at Fair Value) (Details)
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995925 - Disclosure - Financial Assets And Financial Liabilities (Secured Financing Transactions) (Details)
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995935 - Disclosure - Collateralized Transactions (Narrative) (Details)
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995945 - Disclosure - Collateralized Transactions (Amounts Related to Collateralized Transactions) (Details)
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995955 - Disclosure - Collateralized Transactions - Amounts Related To Collateralized Transactions (Parenthetical) (Details)
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995965 - Disclosure - Collateralized Transactions (Financial instruments owned and pledged where the counterparty has the right to repledge) (Details)
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995975 - Disclosure - Revenue From Contracts With Customers (Narrative) (Details)
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995985 - Disclosure - Revenue From Contracts With Customers (Disaggregation of Revenue ) (Details)
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995995 - Disclosure - Other Income (Schedule Of Components Of Other Income) (Details)
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996005 - Disclosure - Employee Incentive Plans (Narrative) (Details)
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996015 - Disclosure - Employee Incentive Plans (Share Grants And Fair Value) (Details)
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996025 - Disclosure - Employee Incentive Plans (2007 Stock Incentive Plan, ROI Summary) (Details)
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996035 - Disclosure - Income Taxes (Additional Information) (Details)
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996045 - Disclosure - Leases (Narrative) (Details)
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996055 - Disclosure - Leases (Lease Cost) (Details)
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996065 - Disclosure - Leases (Supplemental Balance Sheet Information Related To Operating Leases) (Details)
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996075 - Disclosure - Leases (Undiscounted Cash Flows of Operating Lease) (Details)
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996085 - Disclosure - Commitments, Contingencies and Guarantees (Narrative) (Details)
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996095 - Disclosure - Segment Reporting And Geographic Information (Segment Table) (Details)
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996105 - Disclosure - Segment Reporting And Geographic Information (Geographic Table) (Details)
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996115 - Disclosure - Regulatory Requirements (Narrative) (Details)
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996125 - Disclosure - Regulatory Requirements (Summary of Capital, Capital Requirements And Excess Capital) (Details)
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996135 - Disclosure - Related Party Transactions (Details)
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996145 - Disclosure - Related Party Transactions (Additional Information) (Details)
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999009 - Disclosure - Anchoring
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Amounts Related to Collateralized Transactions [table]
Collateralized Transactions Table Text Block
Amounts Related To Collateralized Transactions
EquityAndEarningsPerShareLineItems
Equity And Earnings Per Share [Line Items]
Equity And Earnings Per Share [Line Items]
Securities, Segregated For Regulatory Purposes, Purchased Under Agreements To Resell [Abstract]
Securities, Segregated For Regulatory Purposes, Purchased Under Agreements To Resell [Abstract]
Schedule of Related Party Transactions [Table Text Block]
Schedule Of Related Party Transactions
Entity Incorporation, State or Country Code
Amount of cash outflow to reacquire common stock to satisfy an employees's income tax withholding obligation as part of a net-share settlement of a share-based award
Repurchases of common stock for employee tax withholding under stock incentive plans
Repurchases of common stock for employee tax withholdings
Financial Instruments Owned and Pledged as Collateral [Line Items]
Restatement [Axis]
Non-cash financing activities
Total Financial Liabilities at Fair Value
Total Financial Liabilities at Fair Value
Total Financial Liabilities at Fair Value
Entity's cash and securities accounting policy with respect to restricted balances held for the exclusive benefit of customers according to applicable regulations.
Cash And Securities Policy
Cash And Securities - Segregated For Regulatory Purposes
Equity And Earnings Per Share [Abstract]
Entity Current Reporting Status
US Government Agencies Debt Securities [Member]
U S Government Agencies Debt Securities
Municipal Bonds [Member]
Municipal Securities [Member]
Fair Value Inputs Level2 [Member]
Level 2 [Member]
IBHK [Member]
Ibhk [Member]
IBHK [Member]
Stock Incentive Plan Granted Shares Adjustment for prior year end
Stock Incentive Plan Granted Shares Adjustment
Stock incentive plan granted shares adjustment
Shares authorized
Common stock, shares authorized
Accounts Receivable, Net
Receivables
Directors, Officers, And Affiliates [Member]
Directors Officers And Affiliates [Member]
Directors, Officers, And Affiliates [Member]
Investments Policy
Investments
Product and Service [Axis]
Offsetting Securities Loaned [Abstract]
Document Fiscal Period Focus
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]
Revenue from Contract with Customer [Abstract]
Entity Shell Company
Cash and cash equivalents
Cash and cash equivalents
Distributions from IBG LLC to noncontrolling interests
Distributions from IBG LLC to noncontrolling interests
Disclosure of accounting policy for rebates which consist of volume discounts, credits or payments received from exchanges or other market places related to the placement and/or removal of liquidity from the order flow in the market place.
Rebates Policy Text Block
Rebates
Common stock, shares issued
Balance (in shares)
Balance (in shares)
Statement [Table]
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Right-of-use assets obtained in exchange for operating lease liabilities
Interest Receivable
Interest receivable
Interest
Offsetting Assets [Table]
Statement [Line Items]
Entity Filer Category
Purchases of other investments
Purchases of other investments
Shares granted, net of shares distributed and forfeited.
Net Shares
Ending Balance
Beginning Balance
Total liabilities and stockholders' equity
Total liabilities and stockholders' equity
Others [Member]
Others [Member]
Others [Member]
Recently Issued Accounting Pronouncements
Noninterest Income
Total non-interest income
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Offsetting Financial Instruments Owned, At Fair Value [Abstract]
Property, Plant and Equipment, Type [Axis]
Fair Value Table
Additional Shares Of Common Stock Received By Each Holder On Record From Stock Split
Additional Shares Of Common Stock Received By Each Holder On Record From Stock Split
Additional shares of common stock received by each holder on record from stock split
Derivative Liability Securities Sold Under Agreements To Repurchase Securities Loaned Net
Net Amount
Common Stock distributed pursuant to stock incentive plans (in shares)
Common stock distributed pursuant to stock incentive plans, Shares
Pledged Status [Axis]
Market value of collateral received in securities lending transactions
Securities Lending Collateralized Transactions
Securities lending transactions
Office of Foreign Assets Control [Member]
Office Of Foreign Assets Control [Member]
Office of Foreign Assets Control [Member]
Bad debt expense
Customer bad debt expense
Market Data Fees [Member]
Market Data Fees [Member]
Market Data Fees [Member]
Offsetting Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned [Abstract]
Total [Abstract]
Financial Instruments Owned and Pledged as Collateral [Table]
Diluted earnings per share on comprehensive income
Comprehensive Earnings Per Share Diluted
Diluted
Segment Geographical [Domain]
Geographical [Domain]
The maximum number of shares authorized to be granted and issued under the 2007 Stock Incentive Plan
Share Based Compensation Number Of Shares Available For Grant
Maximum shares of stock distributable under 2007 Stock Incentive Plan
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
Number of shares granted under the 2007 Stock Incentive Plan.
Share Based Compensation Shares Granted
Shares granted
Allowance for credit losses
Total value of shares redeemed by IBG Holdings from IBG LLC funded by using cash on hand at IBG LLC.
Cash Redemptions
Cash Redemptions IBG Holdings
Derivative Asset, Fair Value, Gross Liability
Amounts Offset in the Condensed Consolidated Statement of Financial Condition
Significant Accounting Policies
Finite-Lived Intangible Asset, Useful Life
Intangible assets useful lives
Cash Reserve Deposit Required and Made
Cash segregated for regulatory purposes
Other income (loss)
Reflects the sum of all other revenue and income recognized by the entity in the period not otherwise specified in the income statement, including gains and losses from our currency diversification strategy, financial instruments at fair value and other investments.
Other Income Loss
Other income
Vesting [Domain]
Vesting [Domain]
Disaggregation of Revenue [Table]
Earnings Per Share Basic And Diluted
Contract with Customer, Asset, before Allowance for Credit Loss
Contract assets
Other receivables
Other receivables
Basic earnings per share
Basic
Disaggregation of Revenue [Table Text Block]
Disaggregation of Revenue
Offsetting Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed [Abstract]
Total [Abstract]
Share Grants And Fair Value
Schedule of Share Grants and Fair Value
Stock Issued
Issuance of common stock in exchange of member interests in IBG LLC
Asset Not Pledged As Collateral [Member]
Asset Not Pledged as Collateral [Member]
Tax effect of accumulated other comprehensive income (loss).
Accumulated Other Comprehensive Income Loss Tax
Accumulated other comprehensive income tax
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Adjustments to reconcile net income to net cash from operating activities
Lessee, Operating Lease, Liability, Payments, Due Year Five
2031
Record Date
Includes disclosure of commitments, contingencies and guarantees. This is used as a single block of text to encapsulate the entire disclosure including data and tables.
Commitments Contingencies Guarantees Text Block
Commitments, Contingencies And Guarantees
Sum of the carrying values as of the balance sheet date of liabilities classified as other payables and listed separately on the face of the balance sheet.
Other Payables
Total payables
Purchase of property and equipment
Purchase of property, equipment and intangible assets
Consolidation Items [Domain]
Consolidation Items [Domain]
Tabular disclosure of the ownership of IBG LLC member interests.
IBG LLC Ownership of Member Interests
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' equity
Securities Borrowed
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition
Securities borrowed
Entity Small Business
Retained earnings
Retained earnings
Nature of Operations [Text Block]
Organization of Business
Securities Loaned, Asset
Amounts Offset in the Condensed Consolidated Statement of Financial Condition
Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Cash Or Securities
Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Cash Or Securities
Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Cash Or Securities
Total market value of collateralized transactions as of the balance sheet date.
Collateralized Transactions Total
Total collateralized transactions
Organization of Business [Abstract]
Derivative Fair Value Of Derivative Asset After Application Of Master Netting Agreements And Cash And Securities Collateral
Net Amount
Common Class A [Member]
Common Class A [Member]
Issuable pursuant to 2007 ROI Unit Stock Plan
Issuable pursuant to employee incentive plans
Contract with Customer, Liability
Contract liabilities
Lessee, Lease, Description [Line Items]
Amendment Flag
Other Investments In Equity Securities [Member]
Other Investments In Equity Securities [Member]
Other Investments In Equity Securities [Member]
Products And Services [Domain]
Product and Service [Domain]
Non-cash distributions to noncontrolling interests
Other Significant Noncash Transaction, Value of Consideration Given
Percent of fair value of stock grant expensed during the first year of the grant for employees who are over fifty nine years old.
Stock Granted Expense Over Fifty Nine
SIP expense - Employees over 59 in year of grant
Schedule of Other Operating Cost and Expense, by Component [Table Text Block]
Schedule of Components of Other Income
Distributions received and proceeds from sales of other investments
Proceeds from Sale, Maturity and Collection of Investments
Proceeds from Sale, Maturity and Collection of Investments, Total
Trading Technologies Matter [Member]
Trading Technologies Matter [Member]
Trading Technologies Matter [Member]
Earnings Per Share
Liabilities and Equity [Abstract]
Liabilities and equity
Entity Address, Postal Zip Code
Net Cash Provided by (Used in) Operating Activities
Net cash provided by operating activities
Common Stock [Member]
Common Stock [Member]
Lessee, Operating Lease, Liability, Payments, Due Year Three
2029
Cumulative amount of tax savings realized by the Company, from the IPO and follow-on offerings, that is retained by the Company according to the "Tax Receivable Agreement".
Deferred Tax Assets Value Not Payable To Company
Tax savings retained by IBG Inc.
Portion At Fair Value Fair Value Disclosure [Member]
Portion at Fair Value Measurement [Member]
Portion at Fair Value Measurement [Member] [Default]
Entity Address, Address Line One
Weighted Average Shares Outstanding [Abstract]
Weighted Average Shares Outstanding [Abstract]
Weighted average shares of common stock outstanding:
Holdings
Holdings [Member]
Holdings [Member]
Marketable Securities [Table]
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Total financial instruments owned, at fair value
Financial instruments owned, at fair value
Total financial instruments owned, at fair value
Earnings per share:
Income Tax, Policy [Policy Text Block]
Income Taxes
Aggregate fair value of financial assets as of the balance sheet date including pledged and unpledged trading securities and securities held for investment purposes.
Financial Instruments Trading Non Trading At Fair Value
Total financial assets at fair value
Supplemental disclosures of cash flow information
Comprehensive Income And Foreign Currency Translation
Derivative Asset
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition
Stock Issued During Period Share Redemptions New Issues
StockIssuedDuringPeriodShareRedemptionsNewIssues
Issuance of common stock in follow-on offering, Share
Investment Type [Axis]
Other fair value liabilities, included in accounts payable, accrued expenses and other liabilities
Other Fair Value Liabilities, Included In Accounts Payable, Accrued Expenses And Other Liabilities
Accounts payable, accrued expenses and other liabilities
Financial Assets and Liabilities Not Measured at Fair Value
Operating Lease, Right-of-Use Asset
Right-of-use assets
Repurchase Agreements and Similar Transactions, Maturity Periods [Axis]
Less net income attributable to noncontrolling interests
Net income attributable to noncontrolling interests
Less net income attributable to noncontrolling interests
Significant Accounting Policies [Line Items]
Significant Accounting Policies [Line Items]
Securities Purchased under Agreements to Resell, Gross
Gross Amounts of Financial Assets Recognized
Document Type
Brokers, dealers and clearing organizations
Brokers, dealers, and clearing organizations
Cash paid for taxes
Cash paid for taxes, net
IBG Inc. ownership % of IBG LLC
Entity Central Index Key
Net decrease in cash and cash equivalents
Net increase in cash, cash equivalents and restricted cash
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Interest income
Increase (Decrease) in Payables under Repurchase Agreements
Securities sold under agreement to repurchase
Disclosure Collateralized Transactions [Abstract]
Disclosure Collateralized Transactions Abstract
Eligible equity is equal to the sum of audited capital and reserves and the eligible portion of subordinated debt. Net capital is equal to the net worth of the broker dealer, less certain items such as exchange memberships, carrying value of securities not readily marketable, haircuts on marketable securities in proprietary accounts, furniture and equipment and other illiquid assets as defined.
Net Capital / Eligible Equity
Net Capital / Eligible Equity
Common stock, par value
Other comprehensive income (loss), net of tax
Other comprehensive income (loss), net of tax
Operating Lease, Right-of-Use Asset, Amortization
Amortization of right-of-use assets
Schedule of Securities Financing Transactions
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Asset Offset
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Asset Offset
Excess
Fair value of U.S. and foreign government obligations held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions where counterparty has the right to re-pledge such.
U S Foreign Government Obligations Owned And Pledged As Collateral Amount Eligible To Be Repledged By Counterparty
U.S. and foreign government securities
Parent [Member]
Total Stockholders' Equity [Member]
The net change in the amount due from customers arising from margin loans to clients stated net of allowance for doubtful accounts.
Increase Decrease In Receivables From Customers Net
Receivables from customers
Total shares distributed during the period.
Shares Distributed
Shares Distributed
Stock Incentive Plan Extend Term
Stock Incentive Plan Extend Term
Stock incentive plan extend term
Fair value of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, not subject to a master netting arrangement.
Derivative Collateral Right To Reclaim Cash Or Securities
Amounts of Liabilities Not Offset in the Condensed Consolidated Statement of Financial Condition (Cash or Financial Instruments)
Estimate Of Fair Value Fair Value Disclosure [Member]
at Fair Value
Income taxes related to items of other comprehensive income
Income taxes related to items of other comprehensive income
Ownership [Domain]
Ownership [Domain]
Current Fiscal Year End Date
Basic Earnings Per Share [Abstract]
Basic Earnings Per Share [Abstract]
Basic earnings per share:
Document Quarterly Report
Other Operating Income, Net
Other Operating Income, Net
Other, net
Repurchase of common stock for employee tax withholding under stock incentive plans
Repurchase of common stock for employee tax withholding under stock incentive plans
Repurchases of common stock for employee tax withholdings under stock incentive plans
Litigation Case Type [Domain]
Litigation Case [Domain]
Assets Sold under Agreements to Repurchase, Type [Domain]
Assets Sold under Agreements to Repurchase, Type [Domain]
Fair Value, by Balance Sheet Grouping [Table]
Entity Address, State or Province
Gains (losses) from the Company’s currency diversification strategy, net.
Losses From currency diversification strategy, net
Gains (losses) from currency diversification strategy, net
Comprehensive income available for common stockholders
Comprehensive income available for common stockholders
Issuance Of Common Stock, Promotions, Share
Issuance Of Common Stock, Promotions, Share
Issuance of common stock - IBKR Promotions, shares
Awards Granted On December 31, 2021 Onwards [Member]
Awards Granted On December312021 Onwards [Member]
Awards Granted On December 31, 2021 Onwards [Member]
Shares reserved for future issuance
Geographical [Axis]
Noncontrolling interests
Noncontrolling interests
This element represents the total net changes during the period impacting the parent's ownership interest in a subsidiary as it relates to the total (consolidated) equity attributable to the parent as it is presented on the Statement of Changes in Equity.
Ownership Interest Change S C E
Adjustments for changes in proportionate ownership in IBG LLC
Stock Option [Member]
Options Owned [Member]
Other comprehensive income:
Amount of obligation to return securities and/or cash collateral under master netting arrangements that have not been offset against derivative securities, securities purchased under agreement to resell and securities borrowed.
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Collateral, Obligation to Return Cash or Securities
Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition: Cash or Financial Instruments
Grants Prior To December 31, 2021 [Member]
Grants Prior To December312021 [Member]
Grants Prior To December 31, 2021 [Member]
Subsequent Event [Member]
Subsequent Event [Member]
Collateralized Transactions [Line Items]
Collateralized Transactions [Line Items]
Interest Expense Operating
Interest expense
Securities Financing Transaction [Table]
Fair Value of shares granted under the 2007 Stock Incentive Plan.
Fair Value Share Based Compensation S I P Shares Granted
Fair Value - Date of Grant
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage
Vesting percentage per year
Amount of obligation to return securities and/or cash collateral under master netting arrangements that have not been offset against securities segregated for regulatory purposes, purchased under agreements to resell.
Securities, Segregated For Regulatory Purposes, Purchased Under Agreements To Resell, Collateral, Obligation To Return Cash Or
Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition: Cash or Financial Instruments
Equity And Earnings Per Share [Table]
Equity And Earnings Per Share [Table]
Financial instruments sold, not yet purchased, at fair value
Financial instruments sold, but not yet purchased, at fair value
Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income [Member]
Office Furniture And Equipment [Member]
Office Furniture And Equipment [Member]
Office Furniture And Equipment [Member]
Investments that are measured at adjusted cost since they do not have a readily determinable fair value. Adjusted cost represents the historical cost, less impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer.
Equity Securities Fv Ni Adjusted Cost
Investment in equity securities at adjusted cost
Derivative Liability
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition
Finite Lived Intangible Assets Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Treasury stock shares
Market value of collateral received in reverse repurchase transactions
Agreements To Resell Collateralized Transactions
Agreements to resell
Securities purchased under agreements to resell transactions
Unrealized Changes On Other Investments, Net
Unrealized Changes On Other Investments, Net
Unrealized (gains) losses on other investments, net
Entity Number of Employees
Number of employees
Financial Instruments Owned and Pledged as Collateral (table)
Selling, General and Administrative Expense
General and administrative
Minimum [Member]
Minimum [Member]
IBIE [Member]
Ibie [Member]
IBIE [Member]
Financial Instruments
Derivative Asset, Fair Value, Gross Asset
Gross Amounts of Financial Assets Recognized
Equity Method Investments [Table Text Block]
Composition Of Investment
Common Class B [Member]
Common Class B [Member]
Fair Value Inputs Level3 [Member]
Level 3 [Member]
Increase (decrease) in short-term borrowings, net
Short-term borrowings, net
I B L L C [Member]
IB LLC [Member]
IBLLC Member
Segment Reporting And Geographic Information [Abstract]
Amount of membership interests redeemed by IBG Holdings, LLC from IBG LLC which were funded using cash on hand at IBG LLC.
Share Redeemed By I B G Holdings
Shares redeemed by IBG Holdings from IBG LLC
Amount, after effects of master netting arrangements, of securities, segregated for regulatory purposes, purchased under agreements to resell offset against an obligation to return collateral under a master netting arrangement.
Securities, Segregated For Regulatory Purposes, Purchased Under Agreements To Resell Amount Offset Against Collateral
Net Amount
Related Party Transactions [Abstract]
Commitments and Contingencies
Commitments, contingencies and guarantees (see Note 13)
Lessee, Leases [Policy Text Block]
Leases
Amount of securities segregated for regulatory purposes, before effects of master netting arrangement, of funds outstanding loaned in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price. Includes assets elected not to be offset. Includes assets not subject to a master netting arrangement.
Securities, Segregated For Regulatory Purposes, Purchased Under Agreements To Resell Gross
Gross Amounts of Financial Assets Recognized
Securities purchased under agreemet to resell
Securities Borrowed, Liability
Amounts Offset in the Condensed Consolidated Statement of Financial Condition
Other Labor-related Expenses
Employee compensation
Other Short-term Borrowings
Short-term borrowings
Other comprehensive income (loss) - cumulative translation adjustment
Other comprehensive income - cumulative translation adjustment
Operating Lease, Liability
Lease liabilities
Present value of operating lease liabilities
Basic earnings per share on comprehensive income
Comprehensive Earnings Per Share Basic
Basic
Depreciation and amortization
Depreciation and amortization
Thomas Peterffy [Member]
Thomas Peterffy [Member]
Thomas Peterffy [Member]
Securities Loaned And Securities Sold Under Agreements To Repurchase
Securities Loaned And Securities Sold Under Agreements To Repurchase
Securities Loaned And Securities Sold Under Agreements To Repurchase
Regulatory Requirements
The entire disclosure of the regulatory capital requirements imposed on the entity's Operating Companies.
Regulation And Capital Adequacy Text Block
Sales of treasury stock
IBG LLC [Member]
Ibg Llc [Member]
IBG LLC [Member]
Lessee, Lease, Description [Table]
Securities Financing Transaction [Line Items]
Shares cancelled during the period.
Shares Forfeited
Shares Canceled
Interest Income (Expense), Net
Total net interest income
Net income
Net income
Net income
Paul Brody [Member]
Paul Brody [Member]
Paul Brody [Member]
Majority Stakeholder Percentage
Majority Stakeholder Percentage
Majority stakeholder percentage
The amount expense incurred during the period related to customer receivables that are considered to be uncollectible, net of recoveries.
Customer bad debt
Weighted Average Number of Shares Outstanding, Basic
Weighted Average Number of Shares Outstanding, Basic
Basic
FDIC Sweep Fees [Member]
Fdic Sweep Fees [Member]
FDIC Sweep Fees [Member]
Revenue from External Customers by Geographic Areas [Table Text Block]
Schedule Of Total Net Revenues And Income Before Income Taxes By Geographic Area
Scenario [Axis]
Non-Rule 10b5-1 Arrangement Modified [Flag]
NonRule10b51ArrModifiedFlag
Non-Rule 10b5-1 Arrangement Modified
Document Information [Line Items]
Percentage of unvested shares forfeited by employees who discontinue employment with the Company without cause and continue to meet the terms of the plans' post-employment provisions.
Percent Shares Forfeited Post Employment
Percent of shares canceled post employment
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Property Plant And Equipment Type [Domain]
Property, Plant and Equipment, Type [Domain]
Stock Issued During Period Value Redemptions New Issues
Stock Issued During Period Value Redemptions New Issues
Issuance of common stock in follow-on offering
Interest payable
Interest
Asset Pledged As Collateral [Member]
Asset Pledged as Collateral [Member]
Related Party Transactions
Securities Sold under Agreements to Repurchase
Securities Sold under Agreements to Repurchase, Total
Securities sold under agreements to repurchase
Total stockholders' equity
Total stockholders' equity
Increase (Decrease) in Marketable Securities, Restricted
Securities - segregated for regulatory purposes
Basis of Presentation
Condensed Consolidated Statements of Changes in Equity [Abstract]
Distributions made by IBG LLC to controlling and noncontrolling interests.
Dividends Paid
Distribution from IBG LLC
Equity Method Investments
Equity method investments
Earnings Per Share On Comprehensive Income [Abstract]
Earnings Per Share On Comprehensive Income [Abstract]
Earnings per share on comprehensive income:
Use of Estimates
Use Of Estimates
Security Sold under Agreement to Repurchase, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
Security Sold under Agreement to Repurchase, Including Not Subject to Master Netting Arrangement, after Offset and Deduction, Total
Security Sold under Agreement to Repurchase, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
Credit Loss, Financial Instrument [Policy Text Block]
Current Expected Credit Losses
Stock Issued During Period Value Treasury Stock Reissued, Minority Interest
Stock Issued During Period Value Treasury Stock Reissued, Minority Interest
Sales of treasury stock
Treasury Stock Common [Member]
Treasury Stock [Member]
Represents payments made by IBG, Inc. to IBG Holdings, LLC under the Tax Receivable Agreement
Tax Receivable Agreement Payments
Payments made under the Tax Receivable Agreement
Payable to customers
Payable to customers
Offsetting Derivative Liabilities [Abstract]
Offsetting Financial Instruments Sold, But Not Yet Purchased, At Fair Value [Abstract]
Cash distribution to IBG, Inc.
Distribution to IBG, Inc
Financial Assets And Financial Liabilities
Declaration Date
U [S]
United States [Member]
Noncontrolling Interest [Member]
Non-controlling Interests [Member]
Offsetting Securities Borrowed [Abstract]
Sum of the carrying values as of the balance sheet date of receivables disclosed separately on the statement of financial condition as receivables.
Receivables Net
Total receivables
Increase (decrease) in other assets
Other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual Fund [Member]
Mutual Funds [Member]
Entity [Domain]
Entity [Domain]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights
Vesting rights, description
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, before Offset
Securities sold under agreements to repurchase
Treasury stock
Treasury stock, at cost, 659,407 and 716,889 shares as of March 31, 2026 and December 31, 2025
Securities purchased under agreements to resell
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition
Securities purchased under agreements to resell
Offsetting Assets And Liabilities [Table Text Block]
Offsetting Assets And Liabilities [Table Text Block]
Offsetting Assets And Liabilities
Related and Nonrelated Parties [Axis]
Stock Incentive Plan Shares [Member]
Stock Incentive Plan Shares [Member]
2007 Stock Incentive Plan (Shares)
Property, Equipment, and Intangible Assets
Entity Address, City or Town
Percentage of tax savings retained by the Company according to the "Tax Receivable Agreement"
Deferred Tax Asset, Percentage Retained By Company
Percentage of tax savings retained by IBG Inc.
Fair value of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, not subject to a master netting arrangement, deducted from derivative assets.
Derivative, Collateral, Obligation to Return Cash Or Securities
Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition: Cash or Financial Instruments
Revenues, Net of Interest Expense
Total net revenues
Total net revenues
Security Exchange Name
Securities Purchased Under Agreement To Resell [Member]
Securities Purchased Under Agreement To Resell [Member]
Securities Purchased Under Agreement To Resell [Member]
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition
Non-interest expenses:
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest
Income before income taxes
Income before income taxes
Increase (Decrease) in Financial Instruments Sold, Not yet Purchased
Financial instruments sold, but not yet purchased, at fair value
Internally Developed Software [Member]
Internally Developed Software [Member]
Internally Developed Software [Member]
Total Investments
Total Investments
Total investments
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Cash, cash equivalents and restricted cash at end of period
Cash, cash equivalents and restricted cash at beginning of period
Cash, cash equivalents and restricted cash
Cash paid for interest
Cash paid for interest
Measurement Basis [Axis]
Range [Member]
Range [Domain]
Transfers in and/or out of Level 3 (Liabilities)
Transfers in and/or out of Level 3
Customer-Held Fractional Shares [Member]
Customer Held Fractional Shares [Member]
Customer-Held Fractional Shares [Member]
2007 Stock Incentive Plan Compensation Expense
Document Period End Date
Other Income (Loss) [Abstract]
Title of Individual [Axis]
Fair Value Measurements Fair Value Hierarchy [Domain]
Fair Value, Measurements, Fair Value Hierarchy [Domain]
401(k) plan contribution expense
Securities Borrowed [Member]
Securities Borrowed [Member]
Securities Borrowed [Member]
The percent of ownership in IBG LLC membership interests
Ownership Percentage
Precious Metals [Member]
Precious Metals [Member]
Precious Metals [Member]
Condensed Consolidated Statements of Financial Condition [Abstract]
Shares granted under the Stock Incentive Plan from the IPO to date.
Share Based Compensation Shares Granted I P O To Date
Shares Granted IPO to Date
Revenue Recognition
Shares distributed under post employment provisions.
Shares Distributed Post Employment
Post employment shares distribution
Vesting [Axis]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash, cash equivalents and restricted cash
Statement Class Of Stock Axis
Class of Stock [Axis]
Membership Interests
The amount of membership interests in IBG LLC
Fair value of securities deposited in a special reserve account for the exclusive benefit of customers pursuant to SEC Regulations and the Commodity Exchange Act regulations in addition to other regulations.
Securities Segregated Under Regulations
Securities segregated for regulatory purposes
Cost Method Investment
Investments in exchange memberships and equity securities of certain exchanges
Other Assets, Fair Value Disclosure
Other assets
Description of the nature of an entity's market making and brokerage trading activities and related risks, and how the entity manages those risks.
Description Of Trading Activities And Management Of Related Risks Text Block
Trading Activities And Related Risks
Total liabilities
Total liabilities
Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain]
Financial Instruments [Domain]
Fair value of stocks held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions where counterparty has the right to re-pledge such.
Stock Owned And Pledged As Collateral Amount Eligible To Be Repledged By Counterparty
Stocks
Communications
Securities Purchased under Agreements to Resell, Liability
Amounts Offset in the Condensed Consolidated Statement of Financial Condition
Lessee, Operating Lease, Liability, Payments, Due Year Two
2028
This element represents the total net changes during the period as a result of changes in the noncontrolling interests' ownership interest in the holding company.
Consolidation Non Controlling Ownership Interest Changes Net
Adjustments to noncontrolling interests for changes in proportionate ownership in IBG LLC
Advertising Expense
Advertising
Foreign Exchange Forward [Member]
Currency Forward Contracts [Member]
Weighted Average Number of Shares Outstanding, Diluted
Weighted Average Number of Shares Outstanding, Diluted
Weighted Average Number of Shares Outstanding, Diluted
Diluted
Entity File Number
Amount of right to reclaim securities and/or cash collateral under master netting arrangements that have not been offset against derivative securities, securities sold under agreement to repurchase and securities loaned.
Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Cash Or Securities
Amounts of Liabilities Not Offset in the Consolidated Statement of Financial Condition (Cash or Financial Instruments)
Dividends paid to common shareholders
Dividends paid to stockholders
Thomas Peterffy And Affiliates [Member]
Thomas Peterffy And Affiliates [Member]
Thomas Peterffy And Affiliates [Member]
Other Assets
Other assets
Receivables
Document And Entity Information [Abstract]
Documentation and Entity Information [Abstract]
Investment Type Categorization [Member]
Investments [Domain]
Offsetting Assets [Line Items]
IBG Holdings LLC's ownership percentage in Class B common stock.
Holdings Ownership Percentage Class B
IBG Holdings LLC Ownership Percentage of Class B Common Stock
Securities Borrowed Net
Net Amount
Repurchase and Resale Agreements Policy [Policy Text Block]
Securities Purchased Under Agreements To Resell and Securities Sold Under Agreements to Repurchase
Scenario Unspecified [Domain]
Scenario, Unspecified [Domain]
Rule 10b5-1 Arrangement Modified
Rule10b51ArrModifiedFlag
Rule 10b5-1 Arrangement Modified [Flag]
Segment Reporting Disclosure [Text Block]
Segment Reporting And Geographic Information
This element represents the total net changes during the period impacting the controlling interests' ownership interest in the holding company as a result in the non-controlling interests' ownership interest in the holding company.
Consolidation Controlling Ownership Interest Changes Net
Adjustments to additional paid-in capital for changes in proportionate ownership in IBG LLC
Securities Loaned
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition
Securities loaned
Net Distribution Of Common Stock, Promotion
Net Distribution Of Common Stock, Promotion
Net distribution of common stocks - IBKR Promotion
Cash Paid For Amounts Included In Lease Liabilities
Cash Paid For Amounts Included In Lease Liabilities
Cash paid for amounts included in lease liabilities
Trading Activities And Related Risks [Abstract]
Trading Activities And Related Risks [Abstract]
Payables to customer
Customers
Securities Purchased Under Agreements To Resell Net
Net Amount
Pledged Status [Domain]
Pledged Status [Domain]
Over 59 percent of shares eligible
Percentage of unvested shares to be received by employees over the age of 59 who discontinue employment with the Company without cause and continue to meet the terms of the plans' post-employment provisions.
Over Fifty Nine Percent Unvested Shares Eligible
Derivative Liability, Fair Value, Gross Asset
Amounts Offset in the Condensed Consolidated Statement of Financial Condition
Property, Plant and Equipment, Useful Life
Property and equipment useful lives
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Schedule of Undiscounted Cash Flows of Operating Lease
'Cumulative amount of tax savings realized by the Company, from the IPO and follow-on offerings, that has been paid to IBG Holdings, LLC according to the "Tax Receivable Agreement".
Deferred Tax Assets Paid To Holdings
Tax savings paid to IBG Holdings LLC
Commitment And Contingencies [Line Items]
Commitment And Contingencies [Line Items]
Schedule of Comprehensive Income and Earnings Per Share on Comprehensive Income
Comprehensive Income (Loss) [Table Text Block]
Ownership [Axis]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Vesting period
Comprehensive Income [Text Block]
Comprehensive Income
Payments For Order Flow [Member]
Payments For Order Flow [Member]
Payments For Order Flow [Member]
Carrying Reported Amount Fair Value Disclosure [Member]
At Carrying Value [Member]
Securities Reserve Deposit Required and Made
Securities - segregated for regulatory purposes
Common stock, shares outstanding
Dividends [Domain]
Dividends [Domain]
Document Transition Report
Lessee, Operating Leases [Text Block]
Leases
Subsequent Events
Comprehensive Income
Comprehensive income
Condensed Consolidated Statements of Cash Flows [Abstract]
Total Financial Assets Not Measured At Fair Value
Total Financial Assets Not Measured At Fair Value
Total financial assets, not measured at fair value
Commissions and execution fees
Commissions
Increase (decrease) in securities loaned
Securities loaned
Discloses the defined contribution plan and stock based and other employee incentive plans.
Defined Contribution Employee Incentive Plans Text Block
Employee Incentive Plans
Commencing One Year After Grant Date [Member]
Commencing One Year After Grant Date [Member]
Commencing One Year After Grant Date [Member]
Securities Loaned, Gross
Gross Amounts of Financial Liabilities Recognized
Computer Equipment [Member]
Computer Equipment [Member]
Amount of right to reclaim securities and/or cash collateral under master netting arrangements that have not been offset against securities loaned.
Securities Loaned Collateral Right To Reclaim Cash Or Securities
Amounts of Liabilities Not Offset in the Condensed Consolidated Statement of Financial Condition (Cash or Financial Instruments)
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned
Net Amounts Presented in the Consolidated Statement of Financial Condition
Operating Lease, Cost
Operating lease cost
Disclosure of the accounting policy for receivables from and payables to brokers, dealers and clearing organizations. Balances include amounts related to "fails to deliver", "fails to receive", margin deposits, futures contracts and unsettled trades.
Receivables Payable Brokers Dealers And Clearing Organizations Policy Text Block
Receivables From And Payables To Brokers, Dealers And Clearing Organizations
Litigation Settlement, Amount Awarded to Other Party
Settlement agreement to be paid
Dividends paid to noncontrolling interests
Distributions to noncontrolling interests
Deferred tax benefit retained - follow-on offering
Period Increase Tax Savings Retained
Period Increase Tax Savings Retained
Financial Assets - Level 3 activities
Assets
Percent ownership of IBG LLC redeemed by IBG Holdings from its members in connection with the consummation of the IPO.
Holdings Redemption I B G L L C
IBG Holdings Redemption of IBG LLC
Amount of net occupancy expense, which may include items, such as depreciation of facilities and equipment, lease expenses, property taxes and data processing equipment and related expenses. As well as, the current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.
Occupancy Depreiation And Amortization
Occupancy, depreciation and amortization
Fiscal Year Focus
Permitted To Repledge [Member]
Permitted To Repledge [Member]
Permitted To Repledge [Member]
Cash flows from investing activities:
Cash flows from investing activities
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Asset
Amounts Offset in the Consolidated Statement of Financial Condition
Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Net
Net Amount
Customer margin assets
Defined Contribution Plan, Employer Matching Contribution, Percent of Match
Redemption of member interests from IBG Holdings LLC
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests
Redemption of member interests from IBG Holdings LLC
Restatement [Domain]
Restatement [Domain]
Maturity Overnight [Member]
Overnight and Open [Member]
Due to Affiliate
Affiliate
Payables to cusomers
Financial Assets And Financial Liabilities [Abstract]
Commitments, Contingencies And Guarantees [Abstract]
Receivables Net [Abstract]
Receivables Net [Abstract]
Receivables
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months
2027
Net income available for common stockholders - basic
Net income available for common stockholders
Net income available for common stockholders
Securities Borrowed And Securities Loaned
Derivative Instrument [Axis]
Fair Value of Issued Shares in Exchange for Membership Interests.
Fair Value Of Issued Shares In Exchange For Membership Interests
Fair Value of Issued Shares in Exchange for Membership Interests
Lessee, Operating Lease, Liability, Payments, Due after Year Five
Thereafter
Employee Incentive Plans [Abstract]
Issuance Of Common Stock, Promotions
Issuance Of Common Stock, Promotions
Issuance of common stock - IBKR Promotions
Banking Regulation, Regulatory Capital Requirement, Compliance [Table]
Net cash used in investing activities incl. discontinured operations
Net cash used in investing activities
Collateralized Transactions [Table]
Collateralized Transactions [Table]
Comprehensive Income Detail [Abstract]
Title of 12(b) Security
Schedule of Segment Reporting Information, by Segment [Table]
Related Party [Domain]
Related Party, Type [Domain]
Income Taxes
Collaborative Arrangement and Arrangement Other than Collaborative [Table]
Transaction Based Fees
Transaction Based Fees
Transaction based fees
All Operating Companies [Member]
All Operating Companies
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year
2026 (remaining)
Document Information [Table]
Legal Entity [Axis]
Change in operating assets and liabilities:
Change in operating assets and liabilities
Income Taxes [Abstract]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Additional Paid In Capital [Member]
Additional Paid-in Capital [Member]
Bonds [Member]
Corporate Bonds [Member]
Trading Symbol
Related Party Transaction [Table]
Equity Securities, FV-NI
Investments in equity securities at fair value
Director [Member]
External Director [Member]
Subsequent Event Type [Axis]
Cash flows from financing activities:
Cash flows from financing activities
Supplemental Balance Sheet Information Related To Leases [Table Text Block]
Supplemental Balance Sheet Information Related To Leases [Table Text Block]
Schedule of Supplemental Balance Sheet Information Related to Operating Leases
Lessee, Operating Lease, Liability, Payments, Due
Total undiscounted operating lease payments
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Less: imputed interest
Other Payables [Abstract]
Other Payables [Abstract]
Payables
Securities or Other Assets Sold under Agreements to Repurchase [Axis]
Equity Axis
Equity Component [Domain]
Equity Component [Domain]
2007 Stock Incentive Plan, ROI Summary
Schedule of 2007 Stock Incentive Plan, ROI Summary
Receivables from Brokers-Dealers and Clearing Organizations
Brokers, dealers and clearing organizations
Receivables from brokers, dealers and clearing organizations
Other fees and services related to customers including market data fees, account activity fees, risk exposure fees, order flow income from options exchange mandated programs, and revenues from other fees and services.
Other Fees And Services
Other fees and services
Liability for Uncertainty in Income Taxes, Noncurrent
Liability for Uncertainty in Income Taxes
General and administrative
Other expenses
Total Financial Liabilities Not Measured At Fair Value
Total Financial Liabilities Not Measured At Fair Value
Total financial liabilities, not measured at fair value
Repledged [Member]
Repledged [Member]
Sold Or Repledged [Member]
Increase in securities borrowed
Securities borrowed
U.S. And Foreign Government Securities [Member]
U.s. And Foreign Government Securities [Member]
US And Foreign Government Securities [Member]
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]
Guarantees, Fair Value Disclosure
Principal Transactions Revenue, Net
Principal transactions
Maximum [Member]
Maximum [Member]
Dividends Payable, Date to be Paid
Payment Date
Schedule of Stock by Class [Table Text Block]
Schedule of Authorized, Issued And Outstanding Shares
Statistical Measurement [Axis]
(Decrease) increase in other payables
Other payables
Common stock, $0.01 par value per share
Common stock, $0.01 par value per share
Net income available for common stockholders
Net income available for common stockholders
Dividends [Axis]
Principles Of Consolidation
Principles Of Consolidation, Including Noncontrolling Interests
Total equity
Balance
Balance
Total equity
Requirement
Comprehensive income:
Accounts payable, accrued expenses and other liabilities
Accounts payable, accrued expenses and other liabilities
Shares Granted
Shares granted during the period.
Stock Plan Compensation Shares Granted
Marketable Securities [Line Items]
Margin loans to clients stated net of allowance for doubtful accounts.
Receivables From Customer Net
Customers receivables
Receivables from customers
Customers, less allowance for credit losses of $25 and $24 as of March 31, 2026 and December 31, 2025
Percentage of General and Administrative Expenses
Percentage of General and Administrative Expenses
Proceeds from sales of treasury stock
Proceeds from sales of treasury stock
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Gross
Gross Amounts of Financial Liabilities Recognized
Preferred stock shares authorized
Comprehensive income attributable to noncontrolling interests
Comprehensive income attributable to noncontrolling interests
Decrease (increase) in financial instruments owned
Financial instruments owned, at fair value
Finite-Lived Intangible Assets by Major Class [Axis]
Disclosure of the accounting policy for financial instruments owned and sold, not yet purchased
Financial Instruments Owned Sold Not Yet Purchased Policy Text Block
Financial Instruments Owned And Sold But Not Yet Purchased, at Fair Value
Percent of fair value of stock grant expensed over the related vesting period utilizing the “graded vesting” method permitted under ASC Topic 718.
Stock Granted Expense Remaining Vesting Period
SIP expense - Remaining vesting period
Related Party Transaction [Line Items]
Revenue from Contract with Customer [Text Block]
Revenues From Contracts With Customers
Entity Registrant Name
The unamortized balance of the cumulative deferred tax asset arising from Common Stock offerings.
Unamortized Deferred Tax Asset Arising From Equity Offerings
Unamortized deferred tax asset arising from equity offerings
Leases [Abstract]
Additional paid-in capital
Additional paid-in capital
Subsequent Events [Abstract]
Risk Exposure Fees [Member]
Risk Exposure Fees [Member]
Risk Exposure Fees [Member]
Income tax expense
Dividend per share
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forgive debts owed
Forgive Debts Owed
Forgive Debts Owed
IBG Holdings ownership % of IBG LLC
IBG Holdings ownership % of IBG LLC
Common Stock Shares Outstanding
Amount of obligation to return securities and/or cash collateral under master netting arrangements that have not been offset against securities purchased under agreements to resell.
Securities, Purchased Under Agreements To Resell, Collateral, Obligation To Return Cash Or Securities
Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition: Cash or Financial Instruments
Lessee, Operating Lease, Remaining Lease Term
Leases, remaining terms
Other Income and Other Expense Disclosure [Text Block]
Other Income
Accumulated other comprehensive income, net of income taxes of $0 and $0 as of September 30, 2016 and December 31, 2015
Accumulated other comprehensive income, net of income taxes of $0 as of both March 31, 2026 and December 31, 2025
Consolidation Items [Axis]
Segregated securities amount of liability associated with funds outstanding loaned in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price.
Securities, Segregated For Regulatory Purposes, Purchased Under Agreements To Resell Gross, Liability
Amounts Offset in the Condensed Consolidated Statement of Financial Condition
Assets
Total assets
Regulatory Requirements [Abstract]
Condensed Consolidated Statements of Comprehensive Income [Abstract]
Compensation for stock grants vesting in the future
Compensation for stock grants vesting in the future
Offsetting Securities Purchased under Agreements to Resell [Abstract]
O 2025 Q2 Dividends [Member]
O 2025 Q2 Dividends [Member]
Stock Registered During Period Shares, Common Stock
Stock Registered During Period Shares, Common Stock
Stock registered, number of common stock
Fair Value
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Gross
Gross Amounts of Financial Assets Recognized
Stock-Based Compensation
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, after Offset
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, after Offset, Total
Security Sold Under Agreement To Repurchase After Offset Subject To Master Netting Arrangement
U.S. and foreign government obligations
Financial Instruments Owned U S And Foreign Government Obligations At Fair Value [Member]
U.S. And Foreign Government Securities [Member]
Deferred income taxes
Deferred income taxes
Number of shares granted to external directors under the 2007 Stock Incentive Plan.
Shares Granted External Directors
Shares granted to external directors
Number of new stock issued during the period (in shares)
Shares Issued
Deferred Tax Asset Arising From Equity Offerings
Cumulative Deferred tax asset arising from Common Stock offerings. This amount represent the cumulative DTA recognize from public offerings excluding and amortization.
Deferred Tax Asset Arising From Equity Offerings
Diluted earnings per share:
Earnings Per Share, Diluted
Diluted
Significant Accounting Policies [Table]
Significant Accounting Policies [Table]
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Segment Information
Percent of tax savings realized by the Company that is payable to Holdings according to the "Tax Receivable Agreement"
Deferred Tax Assets, Percentage Payable To Holdings
Percent of tax savings owed to IBG Holdings LLC
Operating Segments [Member]
Operating Segments [Member]
Title Of Individual With Relationship To Entity [Domain]
Title of Individual [Domain]
Dividends paid to shareholders
Dividends paid to stockholders
The net change in the beginning and end of period for investments purchased under the agreement to resell such investment balances.
Increase Decrease In Securities Purchased Under Agreements To Resell
Securities purchased under agreements to resell
Amount of securities segregated for regulatory purposes, after effects of master netting arrangements, of funds outstanding loaned in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price.
Securities, Segregated For Regulatory Purposes, Purchased Under Agreements To Resell
Net Amounts Presented in the Condensed Consolidated Statement of Financial Condition
City Area Code
The entire disclosure for collateralized transactions including securities lending transactions, repurchase and resale agreements, and customer securities pledged to collateralize margin loans, as well as, assets that the company holds for its own account for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral.
Collateralized Transactions Text Block
Collateralized Transactions
As of the balance sheet date, the aggregate estimated unrecognized future compensation costs for unvested 2007 Stock Incentive Plan shares.
S I P Future Compensation Expense
Estimated Future 2007 Stock Incentive Plan Compensation Expense
Option [Member]
Options [Member]
Tax Credit Carryforward, Deferred Tax Asset
Deferred tax asset from common stock offerings
The disclosure for earnings per share and transactions related to the entity's initial public offering and recapitalization as well as subsequent redemptions of member interests.
Equity And Earnings Per Share Text Block
Equity And Earnings Per Share
Asset Pledged As Collateral With Right [Member]
Asset Pledged as Collateral with Right [Member]
Variable Lease, Cost
Variable lease cost
Foreign Government Debt [Member]
Foreign Government Securities [Member]
Litigation Case [Axis]
Operating Lease, Weighted Average Remaining Lease Term
Operating lease, weighted-average remaining lease term
Segment Reporting Information [Line Items]
Stockholders' Equity Note, Stock Split, Conversion Ratio
Stock split ratio
Lease, Cost
Total lease cost
Derivative Liability, Fair Value, Gross Liability
Gross Amounts of Financial Liabilities Recognized
Cash and Cash Equivalents, Policy [Policy Text Block]
Cash And Cash Equivalents
Schedule Of Securities Segregated For Regulatory Purposes [Table Text Block]
Schedule Of Securities Segregated For Regulatory Purposes [Table Text Block]
Schedule Of Securities Segregated For Regulatory Purposes
Retained Earnings [Member]
Retained Earnings [Member]
Employee stock plan compensation
Employee stock plan compensation
Customer Receivables And Payables
Disclosure of accounting policy for customer receivables and payables and the Company's write-off policy for uncollectible customer receivables.
Customers Receivables Payables Policy Text Block
Fair Value of all shares granted under the 2007 Stock Incentive Plan from the IPO to date.
Fair Value Share Based Compensation S I P Shares Granted I P O To Date
Fair Value - Date of Grant IPO to Date
Operating Lease, Weighted Average Discount Rate, Percent
Operating lease, weighted-average discount rate
Fair Value Inputs Level1 [Member]
Level 1 [Member]
Class of Stock [Line Items]
Net cash used in financing activities incl. discontinued operations
Net cash used in financing activities
Derivative Fair Value Of Derivative Liability After Application Of Master Netting Agreements And Cash And Securities Collateral
Net Amount
Lease, Cost [Table Text Block]
Schedule of Lease Cost
Potentially Dilutive Common Shares [Abstract]
Potentially Dilutive Common Shares [Abstract]
Potentially dilutive common shares:
Gross Amounts of Financial Assets Recognized
Gross Amounts of Financial Assets Recognized
The amount of expense during the period for floor brokerage fees paid to other broker-dealers to execute trades on their behalf, exchange fees and clearance fees, including market data, regulatory related fees and issuer fees.
Execution And Clearing
Execution, clearing and distribution fees
Commissions [Member]
Commissions [Member]
Commissions [Member]
Derivative Contract Type [Domain]
Derivative Contract [Domain]
Non Us [Member]
International [Member]
Entity Interactive Data Current
Costs and Expenses, Related Party
Cumulative translation adjustment, before income taxes
Cash flows from operating activities:
The carrying value of funds, segregated for regulatory purposes and for the exclusive benefit of customers, outstanding loaned in the form of security resale agreements if the agreement requires the purchaser to resell the identical security purchased or a security that meets the definition of "substantially the same" in the case of a dollar roll. Also includes purchases of participations in pools of securities that are subject to a resale agreement.
Segregated Securities Purchased Under Agreements To Resell
Securities purchased under agreement to resell segregated for regulatory purposes
Summary Of Capital, Capital Requirements And Excess Capital
Regulation And Capital Adequacy Table Text Block
Summary of Capital, Capital Requirements And Excess Capital
Percent of fair value of stock grant expensed in the year of the grant.
Stock Granted Expense Year Of Grant
SIP expense - Year of grant
Amount of obligation to return securities and/or cash collateral under master netting arrangements that have not been offset against securities borrowed.
Securities Borrowed, Collateral, Obligation To Return Cash Or Securities
Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition: Cash or Financial Instruments
Entity Tax Identification Number
Assets Sold Under Agreements To Repurchase Maturity Period [Domain]
Repurchase Agreements and Similar Transactions, Maturity Periods [Domain]
Non-Transaction Based Fees
Non-Transaction Based Fees
Non-transaction based fees
Revenues:
Fractional Shares Repurchase Obligation [Member]
Fractional Shares Repurchase Obligation [Member]
Fractional Shares Repurchase Obligation [Member]
All Directors [Member]
All Directors [Member]
All Directors [Member]
Offsetting Liabilities [Table]
Effect of exchange rate changes on cash and cash equivalents
Effect of exchange rate changes on cash, cash equivalents and restricted cash
Commitment And Contingencies [Table]
Commitment And Contingencies [Table]
Comprehensive income attributable to noncontrolling interests:
Local Phone Number
Weighted average common shares outstanding:
Securities Loaned Net
Net Amount
Cumulative amount of tax savings realized by the Company, from the IPO and follow-on offerings, that is payable to IBG Holdings, LLC according to the "Tax Receivable Agreement".
Deferred Tax Assets Payable To Holdings
Tax savings owed to IBG Holdings LLC
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Liability
Amounts Offset in the Condensed Consolidated Statement of Financial Condition
Useful life of deferred tax asset related to common stock offerings. This deferred tax asset is amortized as additional deferred income tax expense from the IPO date and from the additional redemption dates.
D T A Useful Life
Amortization period DTA (years)
Defined Contribution Plan Vesting Period
Defined Contribution Plan Vesting Period
Total non-interest expenses
Total non-interest expenses
Significant Accounting Policies [Abstract]
Shares Distributed To Customers Under Promotions
Shares Distributed To Customers Under Promotions
Shares distributed to customers under IBKR Promotions
Scenario Previously Reported [Member]
Previously Reported [Member]
Disaggregation of Revenue [Line Items]
Offsetting Liabilities [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax
Lessee, Operating Lease, Liability, Payments, Due Year Four
2030
Class Of Stock [Domain]
Interactive Brokers Group, Inc.
Employee compensation and benefits
Securities Borrowed That Were Segregated To Satisfy Regulatory Requirements
Securities Borrowed That Were Segregated To Satisfy Regulatory Requirements
Securities borrowed that were segregated to satisfy regulatory requirements
Affiliated Entity [Member]
Affiliated Entity [Member]
Other Regulated Operating Companies [Member]
Other Regulated Operating Companies [Member]
IBG Inc
Ibg Inc [Member]
IBG Inc [Member]
Stock, Class of Stock [Table]
Entity Emerging Growth Company