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INVESTMENTS - Deconsolidation Impacts on Financial Statements (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Net increase (decrease) in assets of consolidated sponsored investment products	$ (236.4)	$ (79.0)	$ (271.8)	$ (81.4)
Net increase (decrease) in liabilities of consolidated sponsored investment products	(4.9)	(33.0)	(4.9)	(33.1)
Net increase (decrease) in redeemable non-controlling interests	$ (68.1)	$ 5.9	$ (96.2)	$ 5.9

X

- Definition

Increase (Decrease) In Assets Of Voting Interest Entities And Variable Interest Entities

+ References

No definition available.

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- Definition

Increase (Decrease) In Liabilities Of Voting Interest Entities And Variable Interest Entities

+ References

No definition available.

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- References

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- Definition

Net Increase or Decrease in balance of noncontrolling interest in the subsidiary during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 16
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481231/810-10-45-16

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