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DEBT - Schedule of Outstanding Debt (Details) - USD ($) | Sep. 30, 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 | 11,853,000,000 | 11,061,000,000
Carrying value | 11,816,000,000 | 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 | 1,000,000,000
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 | 1,787,000,000 | 1,507,000,000
Carrying value | 1,787,000,000 | 1,507,000,000
Maximum borrowing capacity of line of credit | 4,843,000,000 |
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 | 932,000,000 | 762,000,000
Carrying value | 932,000,000 | 762,000,000
Maximum borrowing capacity of line of credit | 1,775,000,000 |
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 | 456,000,000 | 401,000,000
Carrying value | 456,000,000 | 401,000,000
Maximum borrowing capacity of line of credit | 800,000,000 |
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 | 175,000,000 | 0
Carrying value | 175,000,000 | 0
Maximum borrowing capacity of line of credit | 300,000,000 |
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 | 990,000,000 | 988,000,000
Total unamortized debt issuance costs and unamortized discount | 10,000,000 | 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 | 1,246,000,000 | 1,246,000,000
Total unamortized debt issuance costs and unamortized discount | 4,000,000 | 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

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