DEBT - Schedule of Outstanding Debt (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	$ 15,671,000,000	$ 16,221,000,000
Principal amount outstanding	11,196,000,000	12,245,000,000
Carrying value	11,164,000,000	12,210,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing capacity increase under line of credit	7,265,000,000
SMBC Funding Facility
Debt Instrument [Line Items]
Borrowing capacity increase under line of credit	1,000,000,000.0
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	4,843,000,000	4,843,000,000
Principal amount outstanding	1,872,000,000	2,246,000,000
Carrying value	1,872,000,000	2,246,000,000
Line of Credit \| Revolving Funding Facility
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	1,775,000,000	1,775,000,000
Principal amount outstanding	850,000,000	800,000,000
Carrying value	850,000,000	800,000,000
Line of Credit \| SMBC Funding Facility
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	800,000,000	800,000,000
Principal amount outstanding	401,000,000	451,000,000
Carrying value	401,000,000	451,000,000
Line of Credit \| BNP Funding Facility
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	500,000,000	300,000,000
Principal amount outstanding	320,000,000	245,000,000
Carrying value	320,000,000	245,000,000
Convertible Debt \| 2024 Convertible Notes
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	403,000,000	403,000,000
Principal amount outstanding	403,000,000	403,000,000
Carrying value	400,000,000	399,000,000
Total unamortized debt issuance costs and unamortized discount	3,000,000	4,000,000
Senior Notes \| 2023 Notes
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	0	750,000,000
Principal amount outstanding	0	750,000,000
Carrying value	0	750,000,000
Total unamortized debt issuance costs and unamortized discount		0
Senior Notes \| 2024 Notes
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	900,000,000	900,000,000
Principal amount outstanding	900,000,000	900,000,000
Carrying value	899,000,000	898,000,000
Total unamortized debt issuance costs and unamortized discount	1,000,000	2,000,000
Senior Notes \| March 2025 Notes
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	600,000,000	600,000,000
Principal amount outstanding	600,000,000	600,000,000
Carrying value	598,000,000	597,000,000
Total unamortized debt issuance costs and unamortized discount	2,000,000	3,000,000
Senior Notes \| July 2025 Notes
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	1,250,000,000	1,250,000,000
Principal amount outstanding	1,250,000,000	1,250,000,000
Carrying value	1,257,000,000	1,258,000,000
Total unamortized debt issuance costs and unamortized discount	(7,000,000)	(8,000,000)
Senior Notes \| January 2026 Notes
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	1,150,000,000	1,150,000,000
Principal amount outstanding	1,150,000,000	1,150,000,000
Carrying value	1,145,000,000	1,144,000,000
Total unamortized debt issuance costs and unamortized discount	5,000,000	6,000,000
Senior Notes \| July 2026 Notes
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	1,000,000,000	1,000,000,000
Principal amount outstanding	1,000,000,000	1,000,000,000
Carrying value	991,000,000	991,000,000
Total unamortized debt issuance costs and unamortized discount	9,000,000	9,000,000
Senior Notes \| 2027 Notes
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	500,000,000	500,000,000
Principal amount outstanding	500,000,000	500,000,000
Carrying value	494,000,000	494,000,000
Total unamortized debt issuance costs and unamortized discount	6,000,000	6,000,000
Senior Notes \| 2028 Notes
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	1,250,000,000	1,250,000,000
Principal amount outstanding	1,250,000,000	1,250,000,000
Carrying value	1,247,000,000	1,247,000,000
Total unamortized debt issuance costs and unamortized discount	3,000,000	3,000,000
Senior Notes \| 2031 Notes
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	700,000,000	700,000,000
Principal amount outstanding	700,000,000	700,000,000
Carrying value	690,000,000	690,000,000
Total unamortized debt issuance costs and unamortized discount	$ 10,000,000	$ 10,000,000