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INVESTMENTS - Deconsolidation Impacts on Financial Statements (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt and Equity Securities, FV-NI [Line Items]
Gains recognized upon deconsolidation	$ (198.5)	$ 102.1
Reclassification out of accumulated other comprehensive income | Currency translation adjustments
Debt and Equity Securities, FV-NI [Line Items]
Gains recognized upon deconsolidation	1.6	2.6
Assets
Debt and Equity Securities, FV-NI [Line Items]
Net increase (decrease) in assets, liabilities, and redeemable noncontrolling interest	(97.5)	(928.1)
Liability
Debt and Equity Securities, FV-NI [Line Items]
Net increase (decrease) in assets, liabilities, and redeemable noncontrolling interest	(8.6)	(15.3)
Redeemable noncontrolling interest
Debt and Equity Securities, FV-NI [Line Items]
Net increase (decrease) in assets, liabilities, and redeemable noncontrolling interest	$ (63.0)	$ (739.9)

X

- Definition

Represents the carrying value of the assets (liabilities or redeemable noncontrolling interest) deconsolidated during the period as valued on the date that the parent no longer had a controlling financial interest in the subsidiary.

+ References

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- Definition

The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7)
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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