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Performance Bonds and Guaranty Fund Contributions (Tables)
 12 Months Ended
Dec. 31, 2024
Performance Bonds and Guaranty Fund Contributions [Abstract]  
Cash and securities held as performance bonds and guaranty fund contributions at fair value
Cash and non-cash deposits held as performance bonds and guaranty fund contributions at fair value at December 31, 2024 and 2023 were as follows:
 20242023
(in millions)Cash
Non-Cash
Deposits
and
IEF Funds (1)
Cash
Non-Cash
Deposits
and
IEF Funds (1)
Performance bonds$96,036.4 $191,241.1 $87,285.5 $180,866.3 
Guaranty fund contributions2,343.5 7,977.2 2,379.6 6,849.6 
Cross-margin arrangements233.1 678.5 183.1 1,374.5 
Other(2)
282.4 2.1 344.3 2.1 
Total$98,895.4 $199,898.9 $90,192.5 $189,092.5 
Letters of credit At December 31, 2024 and 2023, these letters of credit, which are not included in the accompanying consolidated balance sheets, were as follows:
(in millions)20242023
Performance bonds$4,254.8 $3,916.7 
Performance bond collateral for delivery3,505.9 4,631.4 
Total Letters of Credit$7,760.7 $8,548.1