XML 35 R15.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Goodwill (Notes) | 12 Months Ended
--- | ---
Sep. 30, 2018
Goodwill [Abstract] |
Goodwill Disclosure [Text Block] | Goodwill Goodwill allocated to the Company’s operating segments as of September 30, 2018 and 2017 is as follows:
(in millions) | September 30, 2018 |  | September 30, 2017
Commercial Hedging | $ | 30.3 |  |  | $ | 30.7 |
Global Payments | 8.9 |  |  | 6.3 |
Physical Commodities | 2.4 |  |  | 2.4 |
Securities | 6.8 |  |  | 7.7 |
Goodwill | $ | 48.4 |  |  | $ | 47.1 |
The Company recorded $1.3 million and zero in foreign exchange translation losses on goodwill within the Commercial Hedging and Securities operating segments for the years ended September 30, 2018 and 2017, respectively. The Company also recorded additional goodwill of $2.6 million within the Global Payments operating segment related to the acquisition of PayCommerce Financial Solutions, LLC as discussed further in Note 19.

X
- Definition Goodwill [Abstract] + References No definition available. + Details
Name: | intl_GoodwillAbstract
Namespace Prefix: | intl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2144439 + Details
Name: | us-gaap_GoodwillDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration