XML 38 R27.htm IDEA: XBRL DOCUMENT
v3.25.3

Equity And Earnings Per Share (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2025
Equity And Earnings Per Share [Abstract] |
IBG LLC Ownership of Member Interests |
|  | IBG, Inc. |  | Holdings |  | Total
Ownership % | 26.3% |  | 73.7% |  | 100.0%
Membership interests | 445,405,584 |  | 1,250,737,416 |  | 1,696,143,000
Schedule Of Authorized, Issued And Outstanding Shares |
|  | September 30, 2025 |  | December 31, 2024
|  | Authorized |  | Issued |  | Outstanding |  | Authorized |  | Issued |  | Outstanding
Class A common stock |  | 4,000,000,000 |  | 445,923,364 |  | 445,331,214 |  | 4,000,000,000 |  | 436,244,236 |  | 435,618,452
Class B common stock |  | 1,000 |  | 400 |  | 400 |  | 400 |  | 400 |  | 400
Preferred stock |  | 10,000 |  | - |  | - |  | 10,000 |  | - |  | -
Earnings Per Share Basic And Diluted | Basic earnings per share is calculated utilizing net income available for common stockholders divided by the weighted average number of shares of Class A and Class B common stock outstanding for that period.
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
|  | (in millions, except share or per share amounts)
Basic earnings per share |  |  |  |  |  |  |  |  |  |  |  |
Net income available for common stockholders |  | $ | 263 |  | $ | 184 |  | $ | 700 |  | $ | 538
Weighted average shares of common stock outstanding |  |  |  |  |  |  |  |  |  |  |  |
Class A |  |  | 444,060,413 |  |  | 435,031,564 |  |  | 439,434,316 |  |  | 431,409,988
Class B |  |  | 400 |  |  | 400 |  |  | 400 |  |  | 400
|  |  | 444,060,813 |  |  | 435,031,964 |  |  | 439,434,716 |  |  | 431,410,388
Basic earnings per share |  | $ | 0.59 |  | $ | 0.42 |  | $ | 1.59 |  | $ | 1.25
Diluted earnings per share are calculated utilizing the Company’s basic net income available for common stockholders divided by diluted weighted average shares outstanding with no adjustments to net income available to common stockholders for potentially dilutive common shares.
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
|  | (in millions, except share or per share amounts)
Diluted earnings per share |  |  |  |  |  |  |  |  |  |  |  |
Net income available for common stockholders |  | $ | 263 |  | $ | 184 |  | $ | 700 |  | $ | 538
Weighted average shares of common stock outstanding |  |  |  |  |  |  |  |  |  |  |  |
Class A |  |  |  |  |  |  |  |  |  |  |  |
Issued and outstanding |  |  | 444,060,413 |  |  | 435,031,564 |  |  | 439,434,316 |  |  | 431,409,988
Potentially dilutive common shares |  |  |  |  |  |  |  |  |  |  |  |
Issuable pursuant to employee stock incentive plans |  |  | 2,468,170 |  |  | 3,113,476 |  |  | 3,073,224 |  |  | 3,686,392
Class B |  |  | 400 |  |  | 400 |  |  | 400 |  |  | 400
|  |  | 446,528,983 |  |  | 438,145,440 |  |  | 442,507,940 |  |  | 435,096,780
Diluted earnings per share |  | $ | 0.59 |  | $ | 0.42 |  | $ | 1.58 |  | $ | 1.24

X
- Definition Tabular disclosure of the ownership of IBG LLC member interests. + References No definition available. + Details
Name: | ibkr_IbgLlcOwnershipOfMemberInterests
Namespace Prefix: | ibkr_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
Name: | us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(27)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-4 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-5 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481142/505-10-45-2 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-10 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-8 Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480244/480-10-S99-1 Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-6 Reference 13: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-7 + Details
Name: | us-gaap_ScheduleOfStockByClassTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration