Label	Element	Value
Non-segregated cash and other non-cash equivalent assets included within deposits and receivables from broker-dealers, clearing organizations, and counterparties	intl_Nonsegregatedcashandothernoncashequivalentassetsincludedwithindepositsandreceivablesfrombrokerdealersclearingorganizationsandcounterparties	$ 2,372,100,000
Non-segregated cash and other non-cash equivalent assets included within deposits and receivables from broker-dealers, clearing organizations, and counterparties	intl_Nonsegregatedcashandothernoncashequivalentassetsincludedwithindepositsandreceivablesfrombrokerdealersclearingorganizationsandcounterparties	1,023,300,000
Securities and other assets segregated, fair value	intl_SecuritiesAndOtherAssetsSegregatedFairValue	0	[1]
Securities and other assets segregated, fair value	intl_SecuritiesAndOtherAssetsSegregatedFairValue	299,500,000	[1]
Cash Segregated under Commodity Exchange Act Regulation	us-gaap_CashSegregatedUnderCommodityExchangeActRegulation	2,193,700,000	[1]
Cash Segregated under Commodity Exchange Act Regulation	us-gaap_CashSegregatedUnderCommodityExchangeActRegulation	1,073,900,000	[1]
Deposits with and Receivables From Clearing Organizations, Segregated under Commodity Exchange Act Regulation	intl_DepositsWithAndReceivablesFromClearingOrganizationsSegregatedUnderCommodityExchangeActRegulation	1,208,400,000	[2]
Deposits with and Receivables From Clearing Organizations, Segregated under Commodity Exchange Act Regulation	intl_DepositsWithAndReceivablesFromClearingOrganizationsSegregatedUnderCommodityExchangeActRegulation	993,000,000.0	[2]
Securities Segregated under Other Regulations	us-gaap_SecuritiesSegregatedUnderOtherRegulations	9,600,000	[2]
Securities Segregated under Other Regulations	us-gaap_SecuritiesSegregatedUnderOtherRegulations	$ 363,700,000	[2]
Accounting Standards Update [Extensible List]	us-gaap_AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201802Member
Non-cash equivalent segregated assets	intl_Noncashequivalentsegregatedassets	$ 7,000,000.0
Non-cash equivalent segregated assets	intl_Noncashequivalentsegregatedassets	$ 10,200,000

[1] (1) Represents segregated client cash and United States (“U.S.”) Treasury obligations held at third-party banks. Excludes segregated commodity warehouse receipts, segregated U.S.Treasury obligations with original or acquired maturities of greater than 90 days, and other assets of $10.2 million and $7.0 million as of December 31, 2020 and 2019, respectively, included within ‘Cash, securities and other assets segregated under federal and other regulations’ on the condensed consolidated balance sheets.

[2] (2) Represents segregated client cash and U.S. Treasury obligations on deposit with, or pledged to, exchange clearing organizations and other FCMs. Excludes non-segregated cash, segregated U.S. Treasury obligations pledged to exchange-clearing organizations with original or acquired maturities greater than 90 days, and other assets of $2,372.1 million and $1,023.3 million as of December 31, 2020 and 2019, respectively, included within ‘Deposits with and receivables from broker-dealers, clearing organizations, and counterparties, net’ on the condensed consolidated balance sheets.