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v3.25.1

Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Millions | Common Stock [Member] | Additional Paid-in Capital [Member] | Treasury Stock [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income [Member] | Total Stockholders' Equity [Member] | Non-controlling Interests [Member] | Total
--- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2023 | $ 1 | $ 1,726 | $ (3) | $ 1,852 | $ 8 | $ 3,584 | $ 10,483 | $ 14,067
Balance (in shares) at Dec. 31, 2023 | 107,178,928 |  |  |  |  |  |  |
Issuance of common stock - IBKR Promotions |  | 1 | (4) |  |  | (3) | 3 |
Issuance of common stock - IBKR Promotions, shares | 50,000 |  |  |  |  |  |  |
Net distribution of common stocks - IBKR Promotion |  |  | 4 |  |  | 4 | 1 | 5
Compensation for stock grants vesting in the future |  | 8 |  |  |  | 8 | 20 | 28
Dividends paid to stockholders |  |  |  | (11) |  | (11) |  | (11)
Distributions from IBG LLC to noncontrolling interests |  |  |  |  |  |  | (123) | (123)
Adjustments for changes in proportionate ownership in IBG LLC |  | 1 |  |  |  | 1 | (1) |
Comprehensive income |  |  |  | 175 | (26) | 149 | 544 | 693
Balance at Mar. 31, 2024 | $ 1 | 1,736 | (3) | 2,016 | (18) | 3,732 | 10,927 | 14,659
Balance (in shares) at Mar. 31, 2024 | 107,228,928 |  |  |  |  |  |  |
Balance at Dec. 31, 2024 | $ 1 | 1,816 | (7) | 2,515 | (45) | 4,280 | 12,317 | 16,597
Balance (in shares) at Dec. 31, 2024 | 109,061,059 |  |  |  |  |  |  |
Issuance of common stock - IBKR Promotions |  | 3 | (10) |  |  | (7) | 7 |
Issuance of common stock - IBKR Promotions, shares | 50,000 |  |  |  |  |  |  |
Net distribution of common stocks - IBKR Promotion |  |  | 6 |  |  | 6 | 1 | 7
Compensation for stock grants vesting in the future |  | 8 |  |  |  | 8 | 23 | 31
Dividends paid to stockholders |  |  |  | (27) |  | (27) |  | (27)
Distributions from IBG LLC to noncontrolling interests |  |  |  |  |  |  | (196) | (196)
Adjustments for changes in proportionate ownership in IBG LLC |  | 1 |  |  |  | 1 | (1) |
Comprehensive income |  |  |  | 213 | 28 | 241 | 830 | 1,071
Balance at Mar. 31, 2025 | $ 1 | $ 1,828 | $ (11) | $ 2,701 | $ (17) | $ 4,502 | $ 12,981 | $ 17,483
Balance (in shares) at Mar. 31, 2025 | 109,111,059 |  |  |  |  |  |  |

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