REGULATORY CAPITAL (Details) $ in Millions	Mar. 31, 2022 USD ($) Test
Cboe Trading
Regulatory Requirement
Capital	$ 17.4
Minimum Requirement	1.2
BIDS Trading
Regulatory Requirement
Capital	10.8
Minimum Requirement	0.5
Cboe Europe
Regulatory Requirement
Capital	49.7
Minimum Requirement	26.7
Cboe Chi-X Europe
Regulatory Requirement
Capital	0.4
Minimum Requirement	0.1
Capital resources requirement	0.1
Cboe NL
Regulatory Requirement
Capital	9.9
Minimum Requirement	5.4
EuroCCP
Regulatory Requirement
Capital	57.9
Minimum Requirement	37.7
MATCHNow
Regulatory Requirement
Capital	5.4
Minimum Requirement	0.2
CFE
Regulatory Requirement
Capital	59.7
Minimum Requirement	$ 46.8
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
Cboe Australia
Regulatory Requirement
Cash deposits	$ 4.6
Chi-X Japan
Regulatory Requirement
Minimum required regulatory capital ratio (as a percent)	120.00%
Regulatory capital ratio (as a percent)	266.00%
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.

Name:	cboe_CapitalResourcesRequirement
Namespace Prefix:	cboe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	cboe_MinimumJapaneseRegulatoryCapitalRatio
Namespace Prefix:	cboe_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of minimum net capital required to be maintained.

+ References

No definition available.

+ Details

Name:	cboe_MinimumNetCapitalToBeMaintained
Namespace Prefix:	cboe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	cboe_MinimumNetCapitalToBeMaintainedPercentageOfAggregateIndebtednessItems
Namespace Prefix:	cboe_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of capital adequacy tests required to be met.

+ References

No definition available.

+ Details

Name:	cboe_NumberOfCapitalAdequacyTestsRequiredToBeMet
Namespace Prefix:	cboe_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Regulatory capital ratio.

+ References

No definition available.

+ Details

Name:	cboe_RegulatoryCapitalRatioActual
Namespace Prefix:	cboe_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- 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

No definition available.

+ Details

Name:	cboe_RegulatoryCapitalRequirementsLineItems
Namespace Prefix:	cboe_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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)
-URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826

+ Details

Name:	us-gaap_Capital
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DepositsAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

+ Details

Name:	us-gaap_MinimumNetWorthRequiredForCompliance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	srt_ConsolidatedEntitiesAxis=cboe_CboeTradingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=cboe_BidsTradingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=cboe_CboeEuropeEquitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=cboe_CboeChiXEuropeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=cboe_CboeEuropeNlMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=cboe_EuroCCPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=cboe_MatchnowMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=cboe_CfeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=cboe_CboeSefMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=cboe_ChiXAustraliaPtyLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=cboe_ChiXJapanLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=cboe_CboeAndBidsTradingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: