DEBT - Components of Debt Interest Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Line of Credit Facility [Line Items]
Amortization of debt issuance costs	$ 33	$ 31	$ 30
Net amortization of original issue premium/discount	(6)	(5)	(4)
Interest and credit facility fees	715	582	455
Cash paid for interest expense	676	524	402
Senior Notes
Line of Credit Facility [Line Items]
Stated interest expense	399	269	269
Amortization of debt issuance costs	16	15	15
Net amortization of original issue premium/discount	(6)	(7)	(6)
Interest and credit facility fees	409	277	278
Cash paid for interest expense	399	278	268
Revolving Credit Facility
Line of Credit Facility [Line Items]
Average outstanding balance	1,421	1,795	1,701
Revolving Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Stated interest expense	102	122	71
Credit facility fees	13	13	10
Amortization of debt issuance costs	9	8	8
Interest and credit facility fees	124	143	89
Cash paid for interest expense	$ 118	$ 116	$ 62
Average stated interest rate	7.07%	6.80%	4.11%
Revolving Funding Facility
Line of Credit Facility [Line Items]
Average outstanding balance	$ 751	$ 855	$ 820
Revolving Funding Facility | Line of Credit
Line of Credit Facility [Line Items]
Stated interest expense	55	61	31
Credit facility fees	7	5	5
Amortization of debt issuance costs	4	3	3
Interest and credit facility fees	66	69	39
Cash paid for interest expense	$ 56	$ 60	$ 29
Average stated interest rate	7.15%	7.10%	3.81%
SMBC Funding Facility
Line of Credit Facility [Line Items]
Average outstanding balance	$ 398	$ 410	$ 414
SMBC Funding Facility | Line of Credit
Line of Credit Facility [Line Items]
Stated interest expense	30	29	15
Credit facility fees	2	2	2
Amortization of debt issuance costs	2	2	2
Interest and credit facility fees	34	33	19
Cash paid for interest expense	$ 30	$ 28	$ 14
Average stated interest rate	7.50%	6.92%	3.58%
BNP Funding Facility
Line of Credit Facility [Line Items]
Average outstanding balance	$ 629	$ 438	$ 110
BNP Funding Facility | Line of Credit
Line of Credit Facility [Line Items]
Stated interest expense	48	35	5
Credit facility fees	1	1	1
Amortization of debt issuance costs	2	2	1
Interest and credit facility fees	51	38	7
Cash paid for interest expense	$ 48	$ 33	$ 3
Average stated interest rate	7.48%	7.90%	4.71%
April 2036 CLO Notes | Secured Debt
Line of Credit Facility [Line Items]
Stated interest expense	$ 25
Amortization of debt issuance costs	0
Interest and credit facility fees	25
Cash paid for interest expense	$ 15
Average stated interest rate	6.94%
Average outstanding balance	$ 352
Convertible Unsecured Notes | Convertible Debt
Line of Credit Facility [Line Items]
Stated interest expense	3	$ 19	$ 20
Amortization of debt issuance costs	0	1	1
Net amortization of original issue premium/discount	0	2	2
Interest and credit facility fees	3	22	23
Cash paid for interest expense	$ 9	$ 9	$ 26