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ACQUISITIONS - Intangible assets acquired (Details) - USD ($)
$ in Millions
Jun. 01, 2022
May 02, 2022
Jul. 01, 2021
Cboe Asia Pacific      
Acquisitions      
Total identifiable intangible assets     $ 73.8
Cboe Digital      
Acquisitions      
Total identifiable intangible assets   $ 95.0  
NEO      
Acquisitions      
Total identifiable intangible assets $ 69.1    
Customer relationships | Cboe Asia Pacific      
Acquisitions      
Finite-lived intangible assets acquired     $ 60.1
Useful Life (Years)     30 years
Customer relationships | NEO      
Acquisitions      
Finite-lived intangible assets acquired $ 37.4    
Useful Life (Years) 15 years    
Technology | Cboe Asia Pacific      
Acquisitions      
Finite-lived intangible assets acquired     $ 7.5
Useful Life (Years)     2 years
Technology | Cboe Digital      
Acquisitions      
Finite-lived intangible assets acquired   $ 70.0  
Useful Life (Years)   10 years  
Technology | NEO      
Acquisitions      
Finite-lived intangible assets acquired $ 16.2    
Useful Life (Years) 7 years    
Trademarks and tradenames | NEO      
Acquisitions      
Finite-lived intangible assets acquired $ 0.4    
Useful Life (Years) 5 years    
Licensing Agreements | Cboe Asia Pacific      
Acquisitions      
Indefinite-lived intangible assets acquired     $ 6.2
Licensing Agreements | Cboe Digital      
Acquisitions      
Indefinite-lived intangible assets acquired   $ 25.0  
Licensing Agreements | NEO      
Acquisitions      
Indefinite-lived intangible assets acquired $ 15.1