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REGULATORY CAPITAL (Details)	Sep. 30, 2023 USD ($) Test
Cboe Trading
Regulatory Requirement
Capital	$ 19,400,000
Minimum Requirement	800,000
BIDS Trading
Regulatory Requirement
Capital	4,200,000
Minimum Requirement	$ 500,000
Cboe Fixed Income Markets
Regulatory Requirement
Minimum net capital required to be maintained, option 1 - percentage of aggregate indebtedness items	6.67%
Minimum net capital required to be maintained, option 2 - amount	$ 5,000.0
Capital	7,000,000.0
Minimum Requirement	100,000
Cboe Europe
Regulatory Requirement
Capital	53,900,000
Minimum Requirement	28,200,000
Cboe Chi-X Europe
Regulatory Requirement
Capital	300,000
Minimum Requirement	100,000
Capital resources requirement	100,000
Cboe NL
Regulatory Requirement
Capital	14,600,000
Minimum Requirement	5,600,000
Cboe Clear Europe
Regulatory Requirement
Capital	74,200,000
Minimum Requirement	47,300,000
MATCHNow
Regulatory Requirement
Capital	6,000,000.0
Minimum Requirement	200,000
CFE
Regulatory Requirement
Capital	60,300,000
Minimum Requirement	$ 44,000,000.0
Number of capital adequacy tests required to be met | Test	2
Cboe SEF
Regulatory Requirement
Capital	$ 2,800,000
Minimum Requirement	$ 700,000
Number of capital adequacy tests required to be met | Test	2
Cboe Digital Exchange
Regulatory Requirement
Capital	$ 24,700,000
Minimum Requirement	$ 5,200,000
Number of capital adequacy tests required to be met | Test	2
Cboe Clear Digital
Regulatory Requirement
Capital	$ 26,700,000
Minimum Requirement	$ 5,600,000
Number of capital adequacy tests required to be met | Test	2
Cboe Australia
Regulatory Requirement
Capital	$ 11,500,000
Minimum Requirement	3,900,000
Cboe Japan
Regulatory Requirement
Capital	10,500,000
Minimum Requirement	$ 3,500,000
Minimum required regulatory capital ratio (as a percent)	120.00%
Cboe Trading and BIDS Trading
Regulatory Requirement
Minimum net capital required to be maintained, option 1 - percentage of aggregate indebtedness items	6.67%
Minimum net capital required to be maintained, option 2 - amount	$ 100,000

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Minimum amount of regulatory capital required by Japanese Financial Services Agency ("JFSA") and the Japan Securities Dealers Association ("JSDA").

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Amount of minimum net capital required to be maintained.

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Amount of minimum net capital required to be maintained based on percentage of aggregate indebtedness items.

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The number of capital adequacy tests required to be met.

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Amount of total capital as defined by regulatory framework.

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Amount of minimum net worth required for mortgage banking as defined by regulatory framework.

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