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FAIR VALUE MEASUREMENT - Narrative (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2023 USD ($) item	Jun. 30, 2023 USD ($) item	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting Information
Contingent consideration liabilities	$ 29.1	$ 29.1		$ 39.1
Payment of contingent consideration liabilities		$ 10.2	$ 25.9
Number of other digital asset exchanges used to assess Cboe Digital asset pricing reasonableness | item	3	3
Hanweck, Cboe Asia Pacific and Cboe Canada
Segment Reporting Information
Contingent consideration liabilities	$ 29.1	$ 29.1
Hanweck and Cboe Asia Pacific
Segment Reporting Information
Payment of contingent consideration liabilities	5.3
Recurring
Segment Reporting Information
Contingent consideration liabilities	$ 29.1	$ 29.1		$ 39.1

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- Definition

Number of other stock exchanges.

+ References

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- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479581/805-30-50-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 25
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479668/805-30-25-6

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 35
-Paragraph 1
-Subparagraph (b)
-SubTopic 30
-Topic 805
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479613/805-30-35-1

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- Definition

Amount of cash outflow, not made soon after acquisition date of business combination, to settle contingent consideration liability up to amount recognized at acquisition date, including, but not limited to, measurement period adjustment and less amount paid soon after acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 15
-Subparagraph (f)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-15

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