XML 71 R61.htm IDEA: XBRL DOCUMENT
v3.23.3

Employee Incentive Plans (2007 Stock Incentive Plan, ROI Summary) (Details) | 9 Months Ended
--- | ---
Sep. 30, 2023 shares
Stock Incentive Plan Granted Shares Adjustment | 3,722 |
2007 Stock Incentive Plan (Shares) |  |
Beginning Balance | 4,756,761 | [1]
Shares Canceled | 2,766 | [2]
Shares Distributed | (1,385,593) |
Ending Balance | 3,373,934 |
[1] | Stock Incentive Plan number of granted restricted stock units related to 2022 was adjusted by 3,722 additional restricted stock units during the nine months ended September 30, 2023.
[2] | During the nine months ended September 30, 2023, the Company reinstated 71,562 previously canceled restricted stock units.

X
- Definition Shares granted, net of shares distributed and forfeited. + References No definition available. + Details
Name: | ibkr_NetShares
Namespace Prefix: | ibkr_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total shares distributed during the period. + References No definition available. + Details
Name: | ibkr_SharesDistributed
Namespace Prefix: | ibkr_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Shares cancelled during the period. + References No definition available. + Details
Name: | ibkr_SharesForfeited
Namespace Prefix: | ibkr_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Stock Incentive Plan Granted Shares Adjustment for prior year end + References No definition available. + Details
Name: | ibkr_StockIncentivePlanGrantedSharesAdjustment
Namespace Prefix: | ibkr_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=ibkr_StockIncentivePlanSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |