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DEBT - Schedule of long-term debt (Details)
€ in Millions, $ in Millions
Dec. 31, 2023
USD ($)
Dec. 31, 2023
EUR (€)
Dec. 31, 2022
USD ($)
Mar. 16, 2022
USD ($)
Dec. 15, 2020
USD ($)
Jul. 01, 2020
EUR (€)
Mar. 22, 2018
USD ($)
Jan. 12, 2017
USD ($)
Debt Instrument                
Total debt $ 1,439.2   $ 1,742.0          
Debt issuance costs (5.9)              
Term Loan Agreement                
Debt Instrument                
Total debt     304.7          
Debt instrument face amount             $ 300.0  
3.650% Senior Notes due January 2027                
Debt Instrument                
Total debt 647.9   647.3          
Debt instrument face amount $ 650.0   $ 650.0         $ 650.0
Interest rate (as a percent) 3.65% 3.65% 3.65% 3.65%       3.65%
1.625% Senior Notes due December 2030                
Debt Instrument                
Total debt $ 494.8   $ 494.0          
Debt instrument face amount $ 500.0   $ 500.0   $ 500.0      
Interest rate (as a percent) 1.625% 1.625% 1.625% 1.625% 1.625%      
3.000% Senior Notes due March 2032                
Debt Instrument                
Total debt $ 296.5   $ 296.0          
Debt instrument face amount $ 300.0   $ 300.0 $ 300.0        
Interest rate (as a percent) 3.00% 3.00% 3.00% 3.00%        
Revolving Credit Agreement                
Debt Instrument                
Total debt $ 0.0              
Cboe Clear Europe Credit Facility                
Debt Instrument                
Total debt | €   € 0            
Debt instrument face amount | €           € 1,250