FAIR VALUE MEASUREMENTS OF FINANCIAL INSTRUMENTS - Financial Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Borrowings of consolidated funds	$ 589	$ 462
Cash and Cash Equivalents
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	1,201	1,181
Financial Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	506	417
Common and Preferred Shares
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	107	337
Investment, Affiliated Issuer
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	600	700
Freestanding Derivative
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable Interest Entities	4
Equity Method Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	260	330
Investments in equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable Interest Entities	2,509		$ 253
Investments in debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable Interest Entities	577	252
Assets, Total
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	2,674	2,965
Variable Interest Entities	3,090		505
Financial Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	481	449
Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Borrowings of consolidated funds	589		462
Liabilities, Total
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	481	449
Borrowings of consolidated funds	589		462
Common and Preferred Shares
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	107	27
Investment, Affiliated Issuer
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	600	700
Assets, Total
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	707	727
Liabilities, Total
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	0	0
Financial Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	500	410
Common and Preferred Shares
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	0	310
Equity Method Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	260	330
Investments in equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable Interest Entities	2,509	253	253
Investments in debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable Interest Entities	577	252
Assets, Total
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	760	1,050
Variable Interest Entities	3,086		505
Financial Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	467	444
Liabilities, Total
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	467	444
Financial Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	6	7
Freestanding Derivative
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable Interest Entities	4
Assets, Total
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	6	7
Variable Interest Entities	4
Financial Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	14	5
Liabilities, Total
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	14	5
Cash and Cash Equivalents
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	1,201	1,181
Assets, Total
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	1,201	1,181
Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Borrowings of consolidated funds	589		462
Liabilities, Total
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Instruments	0	$ 0
Borrowings of consolidated funds	$ 589		$ 462