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ACQUISITION - Narrative (Details) - USD ($) shares in Millions	Dec. 31, 2021	Dec. 29, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Contingent consideration	$ 306,300,000		$ 0
OHA Acquisition
Business Acquisition [Line Items]
Cash consideration		$ 2,487,400,000
Stock consideration (in shares)		4.4
Stock consideration	$ 881,500,000	$ 881,500,000
Debt assumed		$ 217,100,000
Consideration restriction from sale, period		1 year
Contingent consideration, maximum earnout payment		$ 900,000,000
Extended earnout payment period		2 years
Earnout payout, if 75% threshold not met		$ 0
Earnout 75% threshold		75.00%
Earnout 30% threshold		22.00%
Contingent consideration		$ 306,300,000
Deductible portion of goodwill acquired		1,200,000,000
Debt assumed		113,500,000
Non-controlling interests in consolidated entities		248,700,000
Acquisition related costs		31,900,000
Indefinite- and definite-lived investment management contracts		778,700,000
OHA Acquisition | Trade Names
Business Acquisition [Line Items]
Indefinite-lived intangible assets acquired, management contracts		$ 134,700,000

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