FAIR VALUE MEASUREMENTS OF FINANCIAL INSTRUMENTS - Changes to Level 3 (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Balance, beginning
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Consolidated Funds		$ 0
Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Consolidated Funds, Level III Changes	$ 25
Deconsolidation
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Consolidated Funds, Level III Changes	0
Purchases and other
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Consolidated Funds, Level III Changes	227
Balance, ending
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Consolidated Funds	252
Balance, beginning
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Fair value		228	$ 122
Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	142	(7)
Purchases and other
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	86	113
Transfers
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	0
Payments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	(12)
Sales
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes		0
Balance, ending
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Fair value	444	228
Balance, beginning
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Fair value		351	0
Level III Changes in Consolidated Funds		251	0
Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	(21)	0
Consolidated Funds, Level III Changes	22	0
Deconsolidation
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Consolidated Funds, Level III Changes	(267)
Purchases and other
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	40	351
Consolidated Funds, Level III Changes	247	251
Transfers
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	(40)
Payments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	0
Sales
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes		0
Balance, ending
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Fair value	330	351
Level III Changes in Consolidated Funds	253	251
Balance, beginning
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Fair value		363	64
Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	16	0
Purchases and other
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	(10)	532
Transfers
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	(59)
Payments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	0
Sales
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes		(233)
Balance, ending
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Fair value	310	363
Balance, beginning
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Fair value		231	$ 37
Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	132	68
Purchases and other
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	47	126
Payments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	0
Transfers
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	0
Sales
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes		0
Balance, ending
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Fair value	$ 410	$ 231