FAIR VALUE MEASUREMENTS OF FINANCIAL INSTRUMENTS - Changes to Level 3 (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Balance, beginning
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Consolidated Funds					$ 170	$ 252	$ 0	$ 0
Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Consolidated Funds, Level III Changes	$ 17	$ 5	$ 17	$ 5
Initial Consolidation
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Consolidated Funds, Level III Changes	390		431
Purchases
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Consolidated Funds, Level III Changes	0	241	0	241
Dispositions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Consolidated Funds, Level III Changes	0		(123)
Balance, ending
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Consolidated Funds	577	246	577	246
Balance, beginning
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Fair value					453	444	302	228
Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	40	100	49	113
Disposals
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes			0
Purchases
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes		0		61
Transfers
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	0		0
Payments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	(26)		(26)
Balance, ending
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Fair value	467	402	467	402
Balance, beginning
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Fair value					260	330	331	351
Level III Changes in Consolidated Funds					2,212	253	422	251
Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	0	(20)	(4)	0
Consolidated Funds, Level III Changes	54	8	61	22
Disposals
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes			(66)
Transfers
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	0		0
Payments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	0		0
Initial Consolidation
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Consolidated Funds, Level III Changes	72		1,954
Purchases
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes		40		0
Consolidated Funds, Level III Changes	171	68	254	225
Dispositions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Consolidated Funds, Level III Changes	0		(13)
Balance, ending
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Fair value	260	351	260	351
Level III Changes in Consolidated Funds	2,509	498	2,509	498
Balance, beginning
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Fair value					64	310	366	363
Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	0	2	65	5
Disposals
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes			0
Purchases
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes		0		0
Transfers
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	(64)		(375)
Payments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	0		0
Balance, ending
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Fair value	0	368	0	368
Balance, beginning
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Fair value					$ 433	$ 410	$ 209	$ 231
Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	67	81	90	59
Disposals
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		0
Purchases
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes		0		0
Payments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes	0		0
Balance, ending
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Level III Changes in Fair value	$ 500	$ 290	$ 500	$ 290