| USD ($) $ in Millions | LTM | Dec 31, 2025 | Dec 31, 2024 | Dec 31, 2023 | Dec 31, 2022 | Dec 31, 2021 | Dec 31, 2020 | Dec 31, 2019 | Dec 31, 2018 | Dec 31, 2017 | Dec 31, 2016 | Dec 31, 2015 | Dec 31, 2014 | Dec 31, 2013 | Dec 31, 2012 | Dec 31, 2011 | Dec 31, 2010 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Cash flows from operating activities: | |||||||||||||||||
Net income | $ 4,896 | $ 4,357 | $ 3,407 | $ 2,812 | |||||||||||||
Adjustments to reconcile net income to net cash used in operating activities | |||||||||||||||||
Translation (gains) losses | - | - | - | - | |||||||||||||
Deferred income taxes | 44 | 41 | (2) | 30 | |||||||||||||
Depreciation and amortization | 64 | 61 | 67 | 65 | |||||||||||||
Amortization of right-of-use assets | 35 | 32 | 29 | 29 | |||||||||||||
Employee stock plan compensation | 124 | 118 | 112 | 100 | |||||||||||||
Unrealized (gains) losses on other investments, net | (38) | (76) | (12) | - | |||||||||||||
Unrealized (gains) losses on other investments, net | - | - | - | (14) | |||||||||||||
(Gain) loss on remeasurement of Tax Receivable Agreement liability | 3 | 3 | 10 | (7) | |||||||||||||
Customer bad debt expense | 10 | 1 | 15 | 7 | |||||||||||||
Impairment loss | - | - | - | - | |||||||||||||
Shares distributed to customers under IBKR Promotions | 29 | 34 | 23 | 12 | |||||||||||||
Non-cash capital contribution | 3 | 3 | - | - | |||||||||||||
Losses on non-trading investments, net | - | - | - | - | |||||||||||||
Bad debt expense and other | - | - | - | - | |||||||||||||
Change in operating assets and liabilities: | |||||||||||||||||
Securities - segregated for regulatory purposes | (2,632) | 1,325 | 7,540 | (3,605) | |||||||||||||
Cash and securities - segregated for regulatory purposes | - | - | - | - | |||||||||||||
Cash and securities - segregated for regulatory purposes | - | - | - | - | |||||||||||||
Securities borrowed | 139 | (6,220) | 466 | (1,086) | |||||||||||||
Securities purchased under agreements to resell | (4,098) | (542) | (1,071) | 525 | |||||||||||||
Financial instruments owned, at fair value | 553 | (3,053) | (434) | (1,033) | |||||||||||||
Receivables from customers | (43,604) | (26,045) | (19,975) | (5,719) | |||||||||||||
Other receivables | (1,184) | (3,049) | (624) | 1,792 | |||||||||||||
Other receivables | - | - | - | - | |||||||||||||
Other assets | (471) | (348) | (203) | (103) | |||||||||||||
Securities loaned | 24,181 | 8,503 | 4,901 | 2,407 | |||||||||||||
Securities sold under agreements to repurchase | - | - | - | - | |||||||||||||
Financial instruments sold, but not yet purchased, at fair value | 15 | 447 | 100 | 47 | |||||||||||||
Payable to customers | 38,362 | 38,993 | 14,331 | 7,817 | |||||||||||||
Payable to customers | - | - | - | - | |||||||||||||
Other payables | (516) | 1,226 | 44 | 468 | |||||||||||||
Net cash provided by operating activities | 15,915 | 15,811 | 8,724 | 4,544 | |||||||||||||
Cash flows from investing activities: | |||||||||||||||||
Purchases of other investments | (119) | (105) | (40) | (26) | |||||||||||||
Distributions received and proceeds from sales of other investments | - | 1 | 45 | 23 | |||||||||||||
Proceeds from sales of other investments | - | - | - | - | |||||||||||||
(Purchase) sale of non-trading investments | - | - | - | - | |||||||||||||
Distributions received from and redemptions of equity investments | - | - | - | - | |||||||||||||
Purchase of property, equipment and intangible assets | (81) | (67) | (49) | (49) | |||||||||||||
Net cash used in investing activities | (181) | (171) | (44) | (52) | |||||||||||||
Net cash used in investing activities | - | - | - | - | |||||||||||||
Cash flows from financing activities: | |||||||||||||||||
Short-term borrowings, net | 5 | 5 | (3) | (1) | |||||||||||||
Redemptions of senior notes | - | - | - | - | |||||||||||||
Borrowings under senior secured credit facility | - | - | - | - | |||||||||||||
Repayments of senior secured credit facility | - | - | - | - | |||||||||||||
Dividends paid to stockholders | (147) | (134) | (92) | (42) | |||||||||||||
Redemption of member interests from IBG Holdings LLC | - | - | - | - | |||||||||||||
Redemption of former member interest | - | - | - | - | |||||||||||||
Reduction in non-controlling interest in subsidiary | - | - | - | - | |||||||||||||
Repurchase of class A Common Stock | - | - | - | - | |||||||||||||
Distributions to noncontrolling interests | (864) | (836) | (715) | (556) | |||||||||||||
Repurchases of common stock for employee tax withholdings | (146) | (84) | (54) | (34) | |||||||||||||
Proceeds from the sale of treasury stock | 150 | 95 | 56 | 34 | |||||||||||||
Issuance of senior notes | - | - | - | 0 | |||||||||||||
Payments made under the Tax Receivable Agreement | (14) | (15) | (25) | (25) | |||||||||||||
Net cash used in financing activities | (1,016) | (969) | (833) | (624) | |||||||||||||
Effect of exchange rate changes on cash and cash equivalents | (158) | 391 | (207) | 122 | |||||||||||||
Net increase in cash, cash equivalents and restricted cash | 14,560 | 15,062 | 7,640 | 3,990 | |||||||||||||
Effect of exchange rate changes on cash and cash equivalents | - | - | - | - | |||||||||||||
Net increase (decrease) in cash and cash equivalents | - | - | - | - | |||||||||||||
Supplemental disclosures of cash flow information | |||||||||||||||||
Cash paid for interest | 4,396 | 4,209 | 4,190 | 3,317 | |||||||||||||
Total cash taxes paid | 304 | 316 | 279 | 228 | |||||||||||||
Cash paid for amounts included in lease liabilities | 42 | 42 | 39 | 35 | |||||||||||||
Non-cash investing activities: | |||||||||||||||||
Issuance of common stock in exchange of member interests in IBG LLC | 254 | 254 | 39 | 229 | |||||||||||||
Redemption of member interests from IBG Holdings LLC | (254) | (254) | (39) | (229) | |||||||||||||
Adjustments to additional paid-in capital for changes in proportionate ownership in IBG LLC | 50 | 48 | 41 | 33 | |||||||||||||
Adjustments to noncontrolling interests for changes in proportionate ownership in IBG LLC | (50) | (48) | (41) | (33) | |||||||||||||
Changes in redemption value of redeemable noncontrolling interests | - | - | - | - | |||||||||||||
Changes to total equity (deficit) for the change in the redemption value of redeemable noncontrolling interests | - | - | - | - | |||||||||||||
Non-cash distributions to noncontrolling interests | - | (69) | - | - | |||||||||||||
Advertising expenses paid by noncontrolling interests | $ (3) | $ (3) | - | - |