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ACQUISITIONS (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	May 02, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Acquisitions
Acquisition-related costs		$ 0.7	$ 14.3	$ 7.1	$ 16.3
Cboe Digital
Acquisitions
Goodwill	$ 460.9
Intangible assets	95.0
Working capital	8.4
Gain on change in fair value	$ 7.5

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- Definition

Amount of working capital assumed at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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- Definition

In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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