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CLEARING OPERATIONS - Cboe Clear Digital (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Clearing Operations    
Interest on customer bank deposits $ 0.3  
Digital assets - safeguarded assets 93.3 $ 51.3
Cboe Clear Digital    
Clearing Operations    
Digital assets - safeguarded assets $ 93.3 $ 51.3