INVESTMENTS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Summary of Investment Holdings [Line Items]
Equity method investments net gains (loss)	$ 9.1	$ (6.4)	$ 33.1	$ 8.8
Consolidated Funds
Summary of Investment Holdings [Line Items]
Percent of total assets threshold	5.00%		5.00%		5.00%