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CLEARING OPERATIONS - Clearing Participant (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Clearing Operations    
Cboe Clear Europe central bank account $ 671.1 $ 841.4
Cboe Clear Europe reverse repurchase and other 947.8 0.0
Cboe Clear U.S. customer bank deposits 4.1 4.1
Total cash margin deposits, clearing funds, and interoperability funds 1,623.0 845.5
Cboe Clear Europe non-cash contributions 1,236.3 997.4
Margin Deposits    
Clearing Operations    
Cboe Clear Europe central bank account 510.4 378.4
Cboe Clear Europe reverse repurchase and other 365.6 0.0
Cboe Clear U.S. customer bank deposits 4.1 4.1
Total cash margin deposits, clearing funds, and interoperability funds 880.1 382.5
Cboe Clear Europe non-cash contributions 862.1 691.4
Clearing Funds    
Clearing Operations    
Cboe Clear Europe central bank account 19.7 173.7
Cboe Clear Europe reverse repurchase and other 165.2 0.0
Cboe Clear U.S. customer bank deposits 0.0 0.0
Total cash margin deposits, clearing funds, and interoperability funds 184.9 173.7
Cboe Clear Europe non-cash contributions 79.7 80.1
Interoperability Funds    
Clearing Operations    
Cboe Clear Europe central bank account 141.0 289.3
Cboe Clear Europe reverse repurchase and other 417.0 0.0
Cboe Clear U.S. customer bank deposits 0.0 0.0
Total cash margin deposits, clearing funds, and interoperability funds 558.0 289.3
Cboe Clear Europe non-cash contributions $ 294.5 $ 225.9