XML 109 R88.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Regulatory Requirements and Subsidiary Dividend Restrictions - Minimum net capital (Details) | Sep. 30, 2016 USD ($)
--- | ---
Capital and Other Regulatory Requirements [Abstract] |
Minimum Net Capital Required for Broker-Dealer Subsidiary | $ 1,000,000
Minimum Net Capital Required for Entity | $ 0.08

X
- Definition Capital and Other Regulatory Requirements [Abstract] + References No definition available. + Details
Name: | intl_CapitalAndOtherRegulatoryRequirementsAbstract
Namespace Prefix: | intl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum amount of net capital required to be maintained by entity's broker-dealer subsidiary to engage in securities transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
Name: | us-gaap_MinimumNetCapitalRequiredForBrokerDealerSubsidiary1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Minimum amount of net capital required to be maintained by the entity to engage in securities transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
Name: | us-gaap_MinimumNetCapitalRequiredForEntity1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant