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REGULATORY CAPITAL (Details) $ in Millions	Jun. 30, 2022 USD ($) Test
Cboe Trading
Regulatory Requirement
Capital	$ 16.4
Minimum Requirement	1.2
BIDS Trading
Regulatory Requirement
Capital	9.1
Minimum Requirement	0.2
Cboe Europe
Regulatory Requirement
Capital	37.3
Minimum Requirement	27.8
Cboe Chi-X Europe
Regulatory Requirement
Capital	0.3
Minimum Requirement	0.1
Capital resources requirement	0.1
Cboe NL
Regulatory Requirement
Capital	9.3
Minimum Requirement	5.5
EuroCCP
Regulatory Requirement
Capital	58.2
Minimum Requirement	38.6
MATCHNow
Regulatory Requirement
Capital	5.2
Minimum Requirement	0.2
CFE
Regulatory Requirement
Capital	85.3
Minimum Requirement	$ 68.6
Number of capital adequacy tests required to be met | Test	2
SEF
Regulatory Requirement
Capital	$ 2.4
Minimum Requirement	$ 0.9
Number of capital adequacy tests required to be met | Test	2
Eris Exchange
Regulatory Requirement
Capital	$ 9.3
Minimum Requirement	$ 4.0
Number of capital adequacy tests required to be met | Test	2
Eris Clearing
Regulatory Requirement
Capital	$ 11.6
Minimum Requirement	$ 3.8
Number of capital adequacy tests required to be met | Test	2
Cboe Australia
Regulatory Requirement
Capital	$ 4.2
Minimum Requirement	4.2
Cboe Japan
Regulatory Requirement
Capital	5.9
Minimum Requirement	$ 2.7
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	$ 0.1

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- Definition

Capital Resources Requirement

+ References

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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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- Definition

Amount of minimum net capital required to be maintained.

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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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The number of capital adequacy tests required to be met.

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Amount of total capital as defined by regulatory framework.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
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Amount of minimum net worth required for mortgage banking as defined by regulatory framework.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 5
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