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FAIR VALUE MEASUREMENT - Changes in fair value of Level 3 financial liabilities (Details) - Level 3 - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Changes in fair value of level 3 financial liabilities |  |
Balance at Beginning of Period | $ 70.5 | $ 32.7
Realized (Gains) Losses during period | $ (5.2) | $ (2.7)
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Business Combination, Contingent Consideration, Liability, Noncurrent | Business Combination, Contingent Consideration, Liability, Noncurrent
Adjustments | $ (44.3) |
Additions | 79.1 | $ 49.6
Settlements | (38.7) | (9.1)
Foreign Currency Translation | (0.9) |
Balance at End of Period | 60.5 | 70.5
Contingent consideration liability |  |
Changes in fair value of level 3 financial liabilities |  |
Balance at Beginning of Period | 70.5 | 32.7
Realized (Gains) Losses during period | (5.2) | (2.7)
Adjustments | (44.3) |
Additions | 57.7 | 49.6
Settlements | (38.7) | (9.1)
Foreign Currency Translation | (0.9) |
Balance at End of Period | 39.1 | $ 70.5
Cboe Digital restricted common units liability |  |
Changes in fair value of level 3 financial liabilities |  |
Additions | 15.5 |
Balance at End of Period | 15.5 |
Cboe Digital warrant liability |  |
Changes in fair value of level 3 financial liabilities |  |
Additions | 5.9 |
Balance at End of Period | $ 5.9 |

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- Definition Amount of foreign currency translation gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3). + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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