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GOODWILL, INTANGIBLE ASSETS, NET, AND DIGITAL ASSETS HELD - Intangible assets by segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Intangible Assets
Balance at beginning of the period			$ 1,668.6
Additions			226.0
Amortization	$ (29.8)	$ (30.6)	(60.4)	$ (63.5)
Changes in foreign currency exchange rates			(41.4)
Balance at end of the period	1,792.8		1,792.8
Options
Intangible Assets
Balance at beginning of the period			159.1
Amortization			(6.6)
Balance at end of the period	152.5		152.5
North American Equities
Intangible Assets
Balance at beginning of the period			991.4
Additions			130.1
Amortization			(30.1)
Changes in foreign currency exchange rates			(0.5)
Balance at end of the period	1,090.9		1,090.9
Europe and Asia Pacific
Intangible Assets
Balance at beginning of the period			426.4
Amortization			(12.7)
Changes in foreign currency exchange rates			(40.9)
Balance at end of the period	372.8		372.8
Global FX
Intangible Assets
Balance at beginning of the period			91.7
Amortization			(9.7)
Balance at end of the period	82.0		82.0
Digital
Intangible Assets
Additions			95.9
Amortization			(1.3)
Balance at end of the period	$ 94.6		$ 94.6

X

- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition, excluding goodwill.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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