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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($) customer segment item shares | Dec. 31, 2023 USD ($) customer | Dec. 31, 2022 USD ($) customer
Summary of Significant Accounting Policies |  |  |
Number of reportable segments | segment | 6 |  |
Goodwill | $ 3,124.2 | $ 3,140.6 | $ 3,122.8
Impairment of goodwill | 0.0 | 0.0 | 460.9
Impairment of intangible assets | 81.0 | 0.0 | 0.0
Revenues | $ 4,094.5 | $ 3,773.5 | $ 3,958.5
Options to renew | true |  |
Option to terminate period (in years) | 1 year |  |
Indefinite-Lived Intangible Assets, Excluding Digital Intangible Assets |  |  |
Summary of Significant Accounting Policies |  |  |
Impairment of intangible assets | $ 0.0 |  |
Cboe Digital Restricted Common Units |  |  |
Summary of Significant Accounting Policies |  |  |
Term of incentive program (in years) | 2 years |  |
Minimum |  |  |
Summary of Significant Accounting Policies |  |  |
Useful life (in years) | 3 years |  |
Renewal term (in years) | 1 year |  |
Maximum |  |  |
Summary of Significant Accounting Policies |  |  |
Useful life (in years) | 7 years |  |
Renewal term (in years) | 5 years |  |
Option to terminate period (in years) | 1 year |  |
Maximum | Cboe Digital Restricted Common Units |  |  |
Summary of Significant Accounting Policies |  |  |
Number of shares of common stock made available for purchase to employees | shares | 20 |  |
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | Major Customer |  |  |
Summary of Significant Accounting Policies |  |  |
Number of customers | customer | 1 | 1 | 1
Concentration risk (as a percent) | 10.00% | 10.00% | 10.00%
Revenues | $ 403.1 | $ 389.4 | $ 415.3
Revenue from Contract with Customer, Product and Service Benchmark | Customer Concentration Risk |  |  |
Summary of Significant Accounting Policies |  |  |
Number of members | item | 2 |  |

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