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Capital and Other Regulatory Requirements - Regulatory Capital Requirements (Details) $ in Millions | Dec. 31, 2019 USD ($)
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FCStone LLC [Member] |
Cash Reserve Deposit Required and Made | $ 9.7
Cash Reserve Deposit Required | 9.1
Net Capital under Commodity Exchange Act Computation | 163.4
Required Net Capital under Commodity Exchange Act | 96.2
Cash and Securities Segregated under Commodity Exchange Act Regulation | 2,272.5
Cash and Securities Segregated under Commodity Exchange Act Regulation, Amount Required to be Segregated | 2,215.7
Secured Funds | 166.6
Secured Funds Required Under Commodity Exchange Act | 154.0
INTL FCStone Ltd [Member] |
Net Capital under Commodity Exchange Act Computation | 270.6
Required Net Capital under Commodity Exchange Act | 130.4
Cash and Securities Segregated under Commodity Exchange Act Regulation | 381.9
Cash and Securities Segregated under Commodity Exchange Act Regulation, Amount Required to be Segregated | 376.6
INTL FCStone Pte Ltd [Member] |
Cash and Securities Segregated under Commodity Exchange Act Regulation | 271.4
Cash and Securities Segregated under Commodity Exchange Act Regulation, Amount Required to be Segregated | $ 238.3

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