DEBT - Schedule of Outstanding Debt (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	$ 16,221,000,000	$ 15,248,000,000
Principal amount outstanding	12,245,000,000	11,061,000,000
Carrying value	12,210,000,000	11,020,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing capacity increase under line of credit	7,265,000,000	7,265,000,000
SMBC Funding Facility
Debt Instrument [Line Items]
Borrowing capacity increase under line of credit	1,000,000,000.0	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	4,232,000,000
Principal amount outstanding	2,246,000,000	1,507,000,000
Carrying value	2,246,000,000	1,507,000,000
Line of Credit \| Revolving Funding Facility
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	1,775,000,000	1,525,000,000
Principal amount outstanding	800,000,000	762,000,000
Carrying value	800,000,000	762,000,000
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	451,000,000	401,000,000
Carrying value	451,000,000	401,000,000
Line of Credit \| BNP Funding Facility
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	300,000,000	300,000,000
Principal amount outstanding	245,000,000	0
Carrying value	245,000,000	0
Convertible Debt \| 2022 Convertible Notes
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	0	388,000,000
Principal amount outstanding	0	388,000,000
Carrying value	0	388,000,000
Total unamortized debt issuance costs and unamortized discount		0
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	399,000,000	395,000,000
Total unamortized debt issuance costs and unamortized discount	4,000,000	8,000,000
Senior Notes \| 2023 Notes
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	750,000,000	750,000,000
Principal amount outstanding	750,000,000	750,000,000
Carrying value	750,000,000	748,000,000
Total unamortized debt issuance costs and unamortized discount	0	2,000,000
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	898,000,000	897,000,000
Total unamortized debt issuance costs and unamortized discount	2,000,000	3,000,000
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	597,000,000	596,000,000
Total unamortized debt issuance costs and unamortized discount	3,000,000	4,000,000
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	1,258,000,000	1,260,000,000
Total unamortized debt issuance costs and unamortized discount	(8,000,000)	(10,000,000)
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	1,144,000,000	1,143,000,000
Total unamortized debt issuance costs and unamortized discount	6,000,000	7,000,000
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	988,000,000
Total unamortized debt issuance costs and unamortized discount	9,000,000	12,000,000
Senior Notes \| 2027 Notes
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	500,000,000	0
Principal amount outstanding	500,000,000	0
Carrying value	494,000,000	0
Total unamortized debt issuance costs and unamortized discount	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	1,246,000,000
Total unamortized debt issuance costs and unamortized discount	3,000,000	4,000,000
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	689,000,000
Total unamortized debt issuance costs and unamortized discount	$ 10,000,000	$ 11,000,000