v2.4.0.8

Regulatory Requirements | 6 Months Ended
--- | ---
Jun. 30, 2014
Regulatory Requirements [Abstract] |
Regulatory Requirements | 13. Regulatory Requirements At June 30, 2014, aggregate excess regulatory capital for all of the Operating Companies was $3.23 billion. TH LLC and IB LLC are subject to the Uniform Net Capital Rule (Rule 15c3‑1) under the Exchange Act and the CFTC’s minimum financial requirements (Regulation 1.17), and THE is subject to the Swiss Financial Market Supervisory Authority eligible equity requirement. Additionally, THSHK is subject to the Hong Kong Securities Futures Commission liquid capital requirement, THA is subject to the Australian Stock Exchange liquid capital requirement, THC and IBC are subject to the Investment Industry Regulatory Organization of Canada risk adjusted capital requirement, IBUK is subject to the U.K. Financial Conduct Authority Capital Requirements Directive, IBI is subject to the National Stock Exchange of India net capital requirements and IBSJ is subject to the Japanese Financial Supervisory Agency capital requirements. The following table summarizes capital, capital requirements and excess regulatory capital (millions):
|  | Net Capital/ |  |  |  |  |  |
|  | Eligible Equity |  | Requirement |  | Excess
IB LLC |  | $ | 2,262.1 |  | $ | 332.6 |  | $ | 1,929.5
TH LLC |  |  | 436.0 |  |  | 60.3 |  |  | 375.7
THE |  |  | 706.8 |  |  | 197.2 |  |  | 509.6
Other regulated Operating Companies |  |  | 465.3 |  |  | 47.1 |  |  | 418.2
|  | $ | 3,870.2 |  | $ | 637.2 |  | $ | 3,233.0
Regulatory capital requirements could restrict the Operating Companies from expanding their business and declaring dividends if their net capital does not meet regulatory requirements. Also, certain entities within IBG, Inc. are subject to other regulatory restrictions and requirements. At June 30, 2014, all of the regulated Operating Companies were in compliance with their respective regulatory capital requirements.

X
- Definition This element discusses the regulatory capital requirements imposed on the entity's Operating Companies. + References No definition available. + Details
Name: | ibkr_RegulationAndCapitalAdequacyTextBlock
Namespace Prefix: | ibkr_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RegulatoryCapitalRequirementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration