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ACQUISITIONS (Details) $ in Millions		3 Months Ended
	Jul. 01, 2021 USD ($) item	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Acquisitions
Contingent consideration liabilities		$ 53.3		$ 70.5
Acquisition-related costs		2.0	$ 3.4
Professional fees		19.7	15.6
Acquisitions
Acquisitions
Acquisition-related costs		$ 2.0	3.4
Professional fees			2.8
Impairment of investment			$ 0.6
Cboe Asia Pacific
Acquisitions
Goodwill	$ 133.6
Intangible assets	73.8
Working capital	25.7
Contingent consideration liabilities	$ 49.6
Number of key capital markets | item	2

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Amount of working capital assumed at the acquisition date.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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

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A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer.

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