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Regulatory Requirements and Subsidiary Dividend Restrictions - Regulatory Capital Requirements (Details) $ in Millions | Sep. 30, 2023 USD ($)
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StoneX Financial Inc. |
Capital and Other Regulatory Requirements [Line Items] |
Cash and securities segregated under commodity exchange act regulation | $ 6,166.2
Secured funds | 261.0
Minimum regulatory requirement | 6,091.9
Secured funds required under commodity exchange act | 249.0
StoneX Financial Ltd. |
Capital and Other Regulatory Requirements [Line Items] |
Cash and securities segregated under commodity exchange act regulation | 1,266.6
Minimum regulatory requirement | 1,253.7
StoneX Financial Pte. Ltd. |
Capital and Other Regulatory Requirements [Line Items] |
Cash and securities segregated under commodity exchange act regulation | 789.0
Minimum regulatory requirement | $ 772.4

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