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INVESTMENTS - Schedule of investments and Other Equity Investments (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
Schedule of Cost and Equity Method Investments |  |  |
Total equity method investments | $ 321.3 | $ 321.3 | $ 292.0
Total other equity investments | 38.2 | 38.2 | 53.3
Total investments | 359.5 | 359.5 | 345.3
Impairment of minority investment |  | 16.0 |
7Ridge Fund |  |  |
Schedule of Cost and Equity Method Investments |  |  |
Total equity method investments | 321.3 | 321.3 | 292.0
Investment in Eris Innovations Holdings, LLC |  |  |
Schedule of Cost and Equity Method Investments |  |  |
Total other equity investments | 20.0 | 20.0 | 20.0
Investment in Globacap Technology Limited |  |  |
Schedule of Cost and Equity Method Investments |  |  |
Total other equity investments |  |  | 16.0
Investment in CSD Br |  |  |
Schedule of Cost and Equity Method Investments |  |  |
Total other equity investments | 5.9 | 5.9 | 5.9
Investment in Coin Metrics Inc. |  |  |
Schedule of Cost and Equity Method Investments |  |  |
Total other equity investments | 5.0 | 5.0 | 5.0
Investment in Cboe Vest Financial Group, Inc. |  |  |
Schedule of Cost and Equity Method Investments |  |  |
Total other equity investments | 2.9 | 2.9 | 2.9
Investment in OCC |  |  |
Schedule of Cost and Equity Method Investments |  |  |
Total other equity investments | 0.3 | 0.3 | 0.3
Other equity investments |  |  |
Schedule of Cost and Equity Method Investments |  |  |
Total other equity investments | 4.1 | $ 4.1 | $ 3.2
Globacap Technology Limited |  |  |
Schedule of Cost and Equity Method Investments |  |  |
Impairment of minority investment | $ 16.0 |  |

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