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ACQUISITIONS - Intangible assets acquired (Details) - USD ($)
$ in Millions
Jun. 01, 2022
May 02, 2022
Cboe Digital    
Acquisitions    
Total identifiable intangible assets   $ 95.0
Cboe Canada    
Acquisitions    
Total identifiable intangible assets $ 69.1  
Customer relationships | Cboe Canada    
Acquisitions    
Finite-lived intangible assets acquired $ 37.4  
Useful Life (Years) 15 years  
Technology | Cboe Digital    
Acquisitions    
Finite-lived intangible assets acquired   $ 70.0
Useful Life (Years)   10 years
Technology | Cboe Canada    
Acquisitions    
Finite-lived intangible assets acquired $ 16.2  
Useful Life (Years) 7 years  
Trademarks and tradenames | Cboe Canada    
Acquisitions    
Finite-lived intangible assets acquired $ 0.4  
Useful Life (Years) 5 years  
Trading registrations and licenses | Cboe Digital    
Acquisitions    
Indefinite-lived intangible assets acquired   $ 25.0
Trading registrations and licenses | Cboe Canada    
Acquisitions    
Indefinite-lived intangible assets acquired $ 15.1