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Regulatory Capital Requirements - Schedule of Subsidiaries with Minimum Regulatory Requirements (Details) $ in Millions | Dec. 31, 2024 USD ($)
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Capital and Other Regulatory Requirements [Abstract] |
Adjusted net capital | $ 10.0
StoneX Financial Inc. |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |
Actual | 439.7
Minimum Requirement | 277.2
StoneX Financial Ltd. |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |
Actual | 522.9
Minimum Requirement | 358.0
Gain Capital Group, LLC |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |
Actual | 47.0
Minimum Requirement | 29.4
StoneX Financial Pte. Ltd. |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |
Actual | 107.8
Minimum Requirement | 24.1
StoneX Markets LLC |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |
Actual | 244.4
Minimum Requirement | $ 133.1

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- Definition Capital and Other Regulatory Requirements [Abstract] + References No definition available. + Details
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- Definition Minimum amount of net capital required to be maintained by broker-dealer subsidiary to engage in security transaction, calculated under Aggregate Indebtedness Standard. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Rule 15c3-1 -Number 240 -Section 15c3-1 -Publisher SEC + Details
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- Definition Amount of adjusted net capital of futures commission merchant (FCM) per Commodity Futures Trading Commission's (CFTC) requirement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name CFTC Regulation -Number 1 -Section 17 -Paragraph c -Subparagraph (5) -Publisher CFTC + Details
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- Definition Amount of net capital required to be maintained by futures commission merchant (FCM) per Commodity Futures Trading Commission's (CFTC) requirement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name CFTC Regulation -Number 1 -Section 17 -Paragraph a -Subparagraph (1)(i) -Publisher CFTC + Details
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- 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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1 + Details
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