DEBT - Narrative (Details)			9 Months Ended
	Feb. 25, 2022 USD ($) subsidiary	Jul. 01, 2020 USD ($)	Sep. 30, 2024 USD ($) subsidiary	Sep. 30, 2024 EUR (€) subsidiary	Dec. 31, 2023 USD ($)	Mar. 16, 2022 USD ($)	Dec. 15, 2020 USD ($)	Jul. 01, 2020 EUR (€)	Jan. 12, 2017 USD ($)
Debt Instrument
Borrowings outstanding			$ 1,440,600,000		$ 1,439,200,000
3.650% Senior Notes
Debt Instrument
Debt instrument face amount			$ 650,000,000		$ 650,000,000				$ 650,000,000
Interest rate (as a percent)			3.65%	3.65%	3.65%				3.65%
1.625% Senior Notes
Debt Instrument
Debt instrument face amount			$ 500,000,000		$ 500,000,000		$ 500,000,000
Interest rate (as a percent)			1.625%	1.625%	1.625%		1.625%
3.000% Senior Notes
Debt Instrument
Debt instrument face amount			$ 300,000,000		$ 300,000,000	$ 300,000,000
Interest rate (as a percent)			3.00%	3.00%	3.00%	3.00%
Senior Notes
Debt Instrument
Redemption price (as a percent)			101.00%
Revolving Credit Agreement
Debt Instrument
Credit agreement, maximum borrowing capacity	$ 400,000,000
Term of agreement (in years)	5 years
Maximum borrowing capacity, increase limit	$ 200,000,000
Maximum borrowing capacity, total with increase	$ 600,000,000
Number of subsidiaries designated as additional borrowers | subsidiary			0	0
Borrowings outstanding			$ 0
Borrowing capacity available			$ 400,000,000
Minimum consolidated interest ratio			4.00
Maximum consolidated leverage ratio			3.50	3.50
Minimum consolidated interest ratio, scenario one			4.25
Minimum consolidated interest ratio, scenario two			4.00
Revolving Credit Agreement | Minimum
Debt Instrument
Number of subsidiaries that may be designated as additional borrowers | subsidiary	1
Interest rate margin (as a percent)			0.75%
Revolving Credit Agreement | Maximum
Debt Instrument
Interest rate margin (as a percent)			1.25%
Revolving Credit Agreement | Floor Rate
Debt Instrument
Interest rate margin (as a percent)			1.00%
Revolving Credit Agreement | Prime Rate | Minimum
Debt Instrument
Interest rate margin (as a percent)			0.00%
Revolving Credit Agreement | Prime Rate | Maximum
Debt Instrument
Interest rate margin (as a percent)			0.25%
Revolving Credit Agreement | Dollars SFOR
Debt Instrument
Interest rate margin (as a percent)			0.10%
Revolving Credit Agreement | Sterling SONIA
Debt Instrument
Interest rate margin (as a percent)			0.0326%
Revolving Credit Agreement | Euros EURIBOR
Debt Instrument
Interest rate margin (as a percent)			0.00%
Revolving Credit Agreement | Line of Credit
Debt Instrument
Credit agreement, maximum borrowing capacity	$ 25,000,000
Cboe Clear Europe Credit Facility
Debt Instrument
Debt instrument face amount | €								€ 1,200,000,000
Maximum borrowing capacity, increase limit | €								500,000,000
Maximum borrowing capacity, total with increase | €								1,700,000,000
Borrowings outstanding | €				€ 0
Borrowing capacity available | €				€ 1,200,000,000
Commitment fee percentage		0.30%
Debt instrument, threshold amount transferred to provider of settlement or custody services | €								500,000,000
Cboe Clear Europe Credit Facility | Minimum
Debt Instrument
Debt instrument, threshold net worth on each drawdown		$ 1,750,000,000
Debt instrument, amount to meet minimum liquidity regulations | €								€ 30,000,000
Cboe Clear Europe Credit Facility | Base Rate
Debt Instrument
Interest rate margin (as a percent)		1.60%
Cboe Clear Europe Credit Facility | Fed Funds Effective Rate Overnight Index Swap Rate
Debt Instrument
Interest rate margin (as a percent)		0.50%