XML 86 R74.htm IDEA: XBRL DOCUMENT
v3.19.2

Capital and Other Regulatory Requirements - Regulatory Capital Requirements (Details) $ in Millions | Jun. 30, 2019 USD ($)
--- | ---
FCStone LLC [Member] |
Net Capital under Commodity Exchange Act Computation | $ 174.4
Required Net Capital under Commodity Exchange Act | 92.0
Cash and Securities Segregated under Commodity Exchange Act Regulation | 2,407.4
Cash and Securities Segregated under Commodity Exchange Act Regulation, Amount Required to be Segregated | 2,349.8
Secured Funds | 141.1
Secured Funds Required Under Commodity Exchange Act | 125.0
Sterne Agee, and Leach, Inc [Member] |
Required Net Capital under Commodity Exchange Act | 0.4
Sterne Agee Financial Services, Inc. [Member] |
Net Capital under Commodity Exchange Act Computation | 4.7
INTL FCStone Ltd [Member] |
Net Capital under Commodity Exchange Act Computation | 236.3
Required Net Capital under Commodity Exchange Act | 115.6
Cash and Securities Segregated under Commodity Exchange Act Regulation | 210.9
Cash and Securities Segregated under Commodity Exchange Act Regulation, Amount Required to be Segregated | 206.3
INTL Netherlands BV [Member] |
Net Capital under Commodity Exchange Act Computation | 238.4
Required Net Capital under Commodity Exchange Act | 116.6
INTL FCStone DTVM Ltda [Member] |
Capital Required for Capital Adequacy | 2.2
Capital | 13.2
Gainvest S.A. Sociedad Gerente de FCI - Comision Nacional de Valores [Member] |
Net Capital under Commodity Exchange Act Computation | 0.5
Required Net Capital under Commodity Exchange Act | 0.1
Capital Required for Capital Adequacy | 0.1
Capital | 4.5
INTL Capital S.A. – General Inspector of Justice [Member] [Domain] |
Net Capital under Commodity Exchange Act Computation | 0.7
Required Net Capital under Commodity Exchange Act | 0.2
INTL Capital S.A. – Superintendence of Securities Markets of Buenos Aires [Member] [Domain] |
Capital Required for Capital Adequacy | 0.5
Capital | 5.4
INTL FCStone Financial (Canada) Inc. [Member] [Member] |
Net Capital under Commodity Exchange Act Computation | 1.8
Required Net Capital under Commodity Exchange Act | 0.2
Cash and Securities Segregated under Commodity Exchange Act Regulation | 0.0
Cash and Securities Segregated under Commodity Exchange Act Regulation, Amount Required to be Segregated | 0.0
Customer Reserve Requirement [Member] [Member] |
Cash Reserve Deposit Required and Made | 15.2
Cash Reserve Deposit Required | 9.4
PAB Reserve Requirement [Member] |
Cash Reserve Deposit Required and Made | 0.0
Cash Reserve Deposit Required | $ 0.0

X
- Definition Cash and Securities Segregated under Commodity Exchange Act Regulation, Amount Required to be Segregated + References No definition available. + Details
Name: | intl_CashAndSecuritiesSegregatedUnderCommodityExchangeActRegulationAmountRequiredToBeSegregated
Namespace Prefix: | intl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition cashreservedepositrequired + References No definition available. + Details
Name: | intl_CashReserveDepositRequired
Namespace Prefix: | intl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Secured funds + References No definition available. + Details
Name: | intl_SecuredFunds
Namespace Prefix: | intl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Secured Funds Required Under Commodity Exchange Act + References No definition available. + Details
Name: | intl_SecuredFundsRequiredUnderCommodityExchangeAct
Namespace Prefix: | intl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of total capital as defined in the regulations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
Name: | us-gaap_Capital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum amount of Total Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
Name: | us-gaap_CapitalRequiredForCapitalAdequacy
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash and securities deposited in a special reserve account for the exclusive benefit of customers pursuant to the Commodity Exchange Act. + References No definition available. + Details
Name: | us-gaap_CashAndSecuritiesSegregatedUnderCommodityExchangeActRegulation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cash deposited in a special reserve account for the exclusive benefit of customers pursuant to SEC Regulations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 305 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6478312&loc=d3e61473-112792 + Details
Name: | us-gaap_CashReserveDepositRequiredAndMade
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of net capital calculated under the Commodity Futures Trading Commission's minimum financial requirements, pursuant to the Commodity Exchange Act, less the market value of certain commodity options. + References No definition available. + Details
Name: | us-gaap_NetCapitalUnderCommodityExchangeActComputation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of net capital required to be maintained under the Commodity Futures Trading Commission's (CFTC) minimum financial requirements, pursuant to the Commodity Exchange Act, less the market value of certain commodity options. + References No definition available. + Details
Name: | us-gaap_RequiredNetCapitalUnderCommodityExchangeAct1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=intl_FcstoneLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=intl_SterneAgeeandLeachIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=intl_SterneAgeeFinancialServicesInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=intl_INTLFCStoneLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=intl_IntlFcstoneEuropeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=intl_IntlFcstoneDtvmLtdaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=intl_GainvestS.A.SociedadGerentedeFCIComisionNacionaldeValoresMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=intl_INTLCapitalS.A.GeneralInspectorofJusticeMemberDomain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=intl_INTLCapitalS.A.SuperintendenceofSecuritiesMarketsofBuenosAiresMemberDomain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=intl_INTLFCStoneFinancialCanadaInc.MemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | intl_ReserverequirementAxis=intl_CustomerReserveRequirementMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | intl_ReserverequirementAxis=intl_PABReserveRequirementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |