REGULATORY CAPITAL (Details) $ in Millions	Dec. 31, 2021 USD ($) Test
Cboe Trading
Regulatory Requirement
Capital	$ 20.4
Minimum Requirement	1.3
BIDS Trading
Regulatory Requirement
Capital	12.0
Minimum Requirement	1.2
Cboe Europe
Regulatory Requirement
Capital	52.2
Minimum Requirement	27.5
Cboe Chi-X Europe
Regulatory Requirement
Capital	0.3
Minimum Requirement	0.1
Capital resources requirement	0.1
Cboe NL
Regulatory Requirement
Capital	9.8
Minimum Requirement	3.8
EuroCCP
Regulatory Requirement
Capital	65.6
Minimum Requirement	38.0
MATCHNow
Regulatory Requirement
Capital	4.3
Minimum Requirement	0.2
CFE
Regulatory Requirement
Capital	61.0
Minimum Requirement	$ 42.2
Number of capital adequacy tests required to be met \| Test	2
SEF
Regulatory Requirement
Capital	$ 2.3
Minimum Requirement	$ 0.9
Number of capital adequacy tests required to be met \| Test	2
Cboe Australia
Regulatory Requirement
Cash deposits	$ 4.4
Chi-X Japan
Regulatory Requirement
Minimum required regulatory capital ratio (as a percent)	120.00%
Regulatory capital ratio (as a percent)	273.00%
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	$ 0.1

Capital Resources Requirement

No definition available.

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- Definition

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

+ References

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Amount of minimum net capital required to be maintained.

+ References

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- Definition

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

+ References

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- Definition

The number of capital adequacy tests required to be met.

+ References

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Regulatory capital ratio.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Amount of total capital as defined by regulatory framework.

+ References

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- Definition

Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment in the future.

+ References

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- Definition

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

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