STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)				1 Months Ended		3 Months Ended		12 Months Ended
	Nov. 18, 2023	Nov. 28, 2022	Nov. 18, 2022	Feb. 29, 2024	May 31, 2018	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Number of shares
Payments for the purchase of shares to satisfy the employee income tax withholdings								$ 29,500,000	$ 13,900,000	$ 8,900,000
Other (expense) income, net								(19,400,000)	600,000	(7,500,000)
Employee
Number of shares
Stock-based compensation expense								40,200,000	33,900,000	30,700,000
Nonemployee
Number of shares
Stock-based compensation expense								1,800,000	1,900,000	1,900,000
Employee Stock
Number of shares
Stock-based compensation expense								$ 2,800,000	$ 2,700,000	$ 600,000
Maximum percentage of annual salary that an employee is permitted to utilize to purchase stock					10.00%
Maximum number of shares that a participant can purchase during any single offering period					312
Maximum fair market value of stock an employee can purchase under the plan per calendar year					$ 25,000
Exercise price per share of common stock as a percent of fair market value								85.00%
Shares reserved for future issuance								491,793
Number of shares of common stock made available for purchase to employees					750,000
Cboe Digital Restricted Common Units
Number of shares
Class of warrant or right outstanding (in shares)								0
Non vested RSAs (in shares)								0	185	185
Vesting period (in years)	5 years
Vested (in shares)								0	0
Granted (in shares)		185						0	0
Interest rate (as a percent)								5.00%
Weighted average exercise price at fair value							$ 300,000
Outstanding and exercisable (in USD per share)							5 years		5 years	6 years
Cash paid to settle award								$ 2,300,000
Expected dividend rate (in percent)							0.00%
Other (expense) income, net						$ (300,000)
Contra revenue recognized								$ 1,400,000
Cboe Digital Warrant Units
Number of shares
Class of warrant or right outstanding (in shares)								0
Non vested RSAs (in shares)								0	80	80
Vesting period (in years)			2 years
Vested (in shares)								0	40
Risk-free interest rate (in percent)									3.89%
Expected volatility (in percent)									65.00%
Warrants vested (in shares)							40
Granted (in shares)								0	0
Weighted average exercise price at fair value							$ 200,000
Cash paid to settle award								$ 400,000
Expected dividend rate (in percent)									0.00%
Expected term (in years)									4 years
Other (expense) income, net								$ 1,300,000
Number of units called by warrants			80
Class of warrant or right exercised (in shares)							0
Minimum | Cboe Digital Restricted Common Units
Number of shares
Expected term (in years)							3 years 10 months 24 days
Maximum | Cboe Digital Restricted Common Units
Number of shares
Expected volatility (in percent)							65.00%
RSUs
Number of shares
Non vested RSAs (in shares)								0	0
Number of shares of common stock of which unit is convertible (in shares)								1
Vesting period (in years)								3 years
Qualified retirement eligibility age for grants awarded between 2017 and 2023								55 years
Qualified retirement eligibility number of years of service for grants awarded between 2017 and 2023								10 years
Qualified retirement eligibility age for grants awarded in and after 2017								55 years
Qualified retirement eligibility number of years of service for grants awarded in and after 2017								10 years
Period of advance notice required								6 months
Shares purchased to satisfy the employee income tax withholdings (in shares)								110,361
Payments for the purchase of shares to satisfy the employee income tax withholdings								$ 20,800,000
Vested (in shares)								297,669
RSUs | Nonemployee
Number of shares
Vesting period (in years)								1 year
Performance Shares
Number of shares
Non vested RSAs (in shares)								111,104	134,484	166,702	152,410
Number of shares of common stock of which unit is convertible (in shares)								1
Vesting period (in years)								3 years
Shares purchased to satisfy the employee income tax withholdings (in shares)								46,867
Payments for the purchase of shares to satisfy the employee income tax withholdings								$ 8,600,000
Vested (in shares)								110,376	55,399	16,834
Risk-free interest rate (in percent)				4.41%
Volatility time period (in years)				2 years 10 months 10 days
Expected volatility (in percent)				21.56%
Correlation to stock index time period (in years)				2 years 10 months 10 days
Correlation with S&P 500 index				0.39
Unrecognized compensation expense								$ 51,900,000
Unrecognized compensation expense, period for recognition								1 year 9 months 18 days
Granted (in shares)								86,996	87,146	64,668
Performance Shares | Minimum
Number of shares
Units ultimately expected to be awarded (in percent)								0.00%
Performance Shares | Maximum
Number of shares
Units ultimately expected to be awarded (in percent)								200.00%
Cboe Digital Restricted Common Units
Number of shares
Non vested RSAs (in shares)							185
Cash paid to settle award								$ 3,300,000
Contra revenue reversed						$ 2,400,000
Risk-free interest rate, minimum							3.81%
Risk-free interest rate, maximum							3.90%
Term of incentive program (in years)								2 years
Cboe Digital Restricted Common Units | Minimum
Number of shares
Expected volatility (in percent)							60.00%
Cboe Digital Restricted Common Units | Maximum
Number of shares
Expected term (in years)							5 years 10 months 24 days
Number of shares of common stock made available for purchase to employees								20