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GOODWILL AND INTANGIBLE ASSETS, NET - Goodwill by segment (Details) $ in Millions	9 Months Ended
	Sep. 30, 2021 USD ($)
Goodwill
Balance at beginning of the year	$ 2,895.1
Adjustments	(0.5)
Additions	134.0
Changes in foreign currency exchange rates	(3.9)
Balance at end of the year	3,024.7
Options
Goodwill
Balance at beginning of the year	305.8
Balance at end of the year	305.8
North American Equities
Goodwill
Balance at beginning of the year	1,877.3
Adjustments	(0.5)
Changes in foreign currency exchange rates	0.1
Balance at end of the year	1,876.9
Europe and Asia Pacific
Goodwill
Balance at beginning of the year	444.8
Additions	134.0
Changes in foreign currency exchange rates	(4.0)
Balance at end of the year	574.8
Global FX
Goodwill
Balance at beginning of the year	267.2
Balance at end of the year	267.2
Futures
Goodwill
Balance at end of the year	$ 0.0

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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+ References

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+ References

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