XML 92 R80.htm IDEA: XBRL DOCUMENT
v3.19.1

Segment Analysis (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018 | Sep. 30, 2018
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | $ 7,192,200,000 | $ 6,507,000,000 | $ 13,744,400,000 | $ 14,425,600,000 |
Operating revenues | 271,100,000 | 260,200,000 | 535,800,000 | 472,800,000 |
Net operating revenues | 165,200,000 | 154,300,000 | 314,200,000 | 284,600,000 |
Net Segment Contribution | 125,300,000 | 115,900,000 | 237,600,000 | 214,700,000 |
Segment Income | 77,200,000 | 72,200,000 | 148,700,000 | 130,500,000 |
Costs not allocated to operating segments | 51,700,000.0 | 42,700,000.0 | 98,800,000 | 82,400,000 |
Other gain | 5,400,000 | 0 | 5,400,000 | 0 |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | 30,900,000 | 29,500,000 | 55,300,000 | 48,100,000 |
Assets | 9,407,700,000 |  | 9,407,700,000 |  | $ 7,824,700,000
Commercial Hedging [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 80,600,000.0 | 78,300,000.0 | 140,400,000 | 139,800,000 |
Operating revenues | 80,600,000.0 | 78,300,000.0 | 140,400,000 | 139,800,000 |
Net operating revenues | 65,800,000.0 | 61,900,000.0 | 111,100,000 | 111,000,000 |
Net Segment Contribution | 49,300,000.0 | 44,700,000.0 | 79,900,000 | 81,200,000 |
Segment Income | 30,200,000.0 | 27,600,000.0 | 43,500,000 | 48,700,000 |
Assets | 1,704,700,000 |  | 1,704,700,000 |  | 1,935,700,000
Global Payments [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 27,400,000.0 | 23,400,000.0 | 57,100,000 | 48,000,000 |
Operating revenues | 27,400,000.0 | 23,400,000.0 | 57,100,000 | 48,000,000 |
Net operating revenues | 25,800,000.0 | 21,900,000.0 | 54,200,000 | 44,900,000 |
Net Segment Contribution | 21,000,000.0 | 17,600,000.0 | 44,100,000 | 36,000,000 |
Segment Income | 15,800,000.0 | 13,500,000.0 | 34,400,000 | 28,100,000 |
Assets | 234,400,000 |  | 234,400,000 |  | 206,600,000
Securities Segment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 72,600,000.0 | 55,500,000.0 | 141,600,000 | 98,500,000 |
Operating revenues | 72,600,000.0 | 55,500,000.0 | 141,600,000 | 98,500,000 |
Net operating revenues | 32,000,000.0 | 27,600,000.0 | 64,100,000 | 51,100,000 |
Net Segment Contribution | 20,100,000.0 | 20,300,000.0 | 41,900,000 | 38,100,000 |
Segment Income | 11,800,000.0 | 12,800,000.0 | 27,800,000 | 23,800,000 |
Assets | 5,150,000,000 |  | 5,150,000,000 |  | 3,058,200,000
Physical Commodities [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 6,940,900,000.0 | 6,262,300,000.0 | 13,242,700,000 | 13,978,900,000 |
Operating revenues | 19,800,000.0 | 15,500,000.0 | 34,100,000 | 26,100,000 |
Net operating revenues | 15,100,000.0 | 12,500,000.0 | 25,500,000 | 20,900,000 |
Net Segment Contribution | 11,500,000.0 | 9,400,000.0 | 18,600,000 | 15,000,000 |
Segment Income | 7,800,000.0 | 5,600,000.0 | 13,700,000 | 6,700,000 |
Assets | 406,200,000 |  | 406,200,000 |  | 413,700,000
Clearing and Execution Services Segment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 73,600,000.0 | 88,000,000.0 | 168,800,000 | 160,200,000 |
Operating revenues | 73,600,000.0 | 88,000,000.0 | 168,800,000 | 160,200,000 |
Net operating revenues | 31,000,000.0 | 31,800,000.0 | 68,500,000 | 59,200,000 |
Net Segment Contribution | 23,400,000.0 | 23,900,000.0 | 53,100,000 | 44,400,000 |
Segment Income | 11,600,000.0 | 12,700,000.0 | 29,300,000 | 23,200,000 |
Assets | 1,773,100,000 |  | 1,773,100,000 |  | 2,109,900,000
Corporate [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | (2,900,000.0) | (500,000.0) | (6,200,000) | 200,000 |
Operating revenues | (2,900,000.0) | (500,000.0) | (6,200,000) | 200,000 |
Net operating revenues | (4,500,000.0) | $ (1,400,000.0) | (9,200,000) | $ (2,500,000) |
Assets | $ 139,300,000 |  | $ 139,300,000 |  | $ 100,600,000

X
- Definition Costs not allocated to operating segments + References No definition available. + Details
Name: | intl_Costsnotallocatedtooperatingsegments
Namespace Prefix: | intl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Net segment contribution equals revenues less cost of sales, transaction-based clearing expenses, variable bonus compensation, introducing broker commissions and interest expense. + References No definition available. + Details
Name: | intl_NetSegmentContribution
Namespace Prefix: | intl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Segment Income equals net contribution less non-variable direct segment costs. + References No definition available. + Details
Name: | intl_SegmentIncome
Namespace Prefix: | intl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_Assets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_GrossProfit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) related to nonoperating activities, classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7,9) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_OtherNonoperatingGainsLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income after deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References No definition available. + Details
Name: | us-gaap_RevenuesNetOfInterestExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=intl_CommodityAndRiskManagementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=intl_ForeignExchangeSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=intl_SecuritiesSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=intl_OtherSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=intl_ClearingAndExecutionServicesSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_CorporateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |