DEBT - Schedule of Outstanding Debt (Details) - USD ($)	Jun. 30, 2023	Feb. 28, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	$ 15,876,000,000		$ 16,221,000,000
Principal amount outstanding	11,401,000,000		12,245,000,000
Carrying value	11,371,000,000		12,210,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing capacity increase under line of credit	7,137,000,000		7,265,000,000
SMBC Funding Facility
Debt Instrument [Line Items]
Borrowing capacity increase under line of credit	1,000,000,000.0
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	4,758,000,000		4,843,000,000
Principal amount outstanding	1,922,000,000		2,246,000,000
Carrying value	1,922,000,000		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	790,000,000		300,000,000
Principal amount outstanding	475,000,000		245,000,000
Carrying value	475,000,000		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	401,000,000		399,000,000
Senior Notes | 2023 Notes
Debt Instrument [Line Items]
Total aggregate principal amount committed / outstanding	0	$ 750,000,000	750,000,000
Principal amount outstanding	0		750,000,000
Carrying value	0		750,000,000
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	899,000,000		898,000,000
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
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	1,256,000,000		1,258,000,000
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
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	992,000,000		991,000,000
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	495,000,000		494,000,000
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
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