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DEBT - Outstanding Debt (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	$ 19,348	$ 18,948
Principal Amount Outstanding	13,948	13,789
Carrying Value	13,922	13,727
Carrying value
Debt Instrument [Line Items]
Fair value disclosures of long-term debt	13,922	13,727
Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing capacity increase under line of credit	6,732
SMBC Funding Facility
Debt Instrument [Line Items]
Borrowing capacity increase under line of credit	1,000
April 2036 CLO Notes
Debt Instrument [Line Items]
Principal Amount Outstanding	702
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	4,513	4,513
Principal Amount Outstanding	1,113	1,113
Carrying Value	1,113	1,113
Line of Credit | Revolving Funding Facility
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	2,150	2,150
Principal Amount Outstanding	1,030	1,065
Carrying Value	1,030	1,065
Line of Credit | SMBC Funding Facility
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	800	800
Principal Amount Outstanding	400	502
Carrying Value	400	502
Line of Credit | SMBC Funding Facility | Carrying value
Debt Instrument [Line Items]
Fair value disclosures of long-term debt	400
Line of Credit | BNP Funding Facility
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	1,265	1,265
Principal Amount Outstanding	785	889
Carrying Value	785	889
Line of Credit | BNP Funding Facility | Carrying value
Debt Instrument [Line Items]
Fair value disclosures of long-term debt	785
Secured Debt | April 2036 CLO Notes
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	476	476
Principal Amount Outstanding	476	476
Carrying Value	473	473
Secured Debt | October 2036 CLO Secured Loans
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	544	544
Principal Amount Outstanding	544	544
Carrying Value	541	541
Senior Notes | March 2025 Notes
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	0	600
Principal Amount Outstanding	0	600
Carrying Value	0	600
Senior Notes | March 2025 Notes | Carrying value
Debt Instrument [Line Items]
Fair value disclosures of long-term debt	0	600
Senior Notes | July 2025 Notes
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	1,250	1,250
Principal Amount Outstanding	1,250	1,250
Carrying Value	1,251	1,252
Senior Notes | July 2025 Notes | Carrying value
Debt Instrument [Line Items]
Fair value disclosures of long-term debt	1,251	1,252
Senior Notes | January 2026 Notes
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	1,150	1,150
Principal Amount Outstanding	1,150	1,150
Carrying Value	1,149	1,148
Senior Notes | January 2026 Notes | Carrying value
Debt Instrument [Line Items]
Fair value disclosures of long-term debt	1,149	1,148
Senior Notes | July 2026 Notes
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	1,000	1,000
Principal Amount Outstanding	1,000	1,000
Carrying Value	996	996
Senior Notes | July 2026 Notes | Carrying value
Debt Instrument [Line Items]
Fair value disclosures of long-term debt	996	996
Senior Notes | January 2027 Notes
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	900	900
Principal Amount Outstanding	900	900
Carrying Value	900	891
Senior Notes | January 2027 Notes | Carrying value
Debt Instrument [Line Items]
Fair value disclosures of long-term debt	900	891
Senior Notes | June 2027 Notes
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	500	500
Principal Amount Outstanding	500	500
Carrying Value	497	497
Senior Notes | June 2027 Notes | Carrying value
Debt Instrument [Line Items]
Fair value disclosures of long-term debt	497	497
Senior Notes | June 2028 Notes
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	1,250	1,250
Principal Amount Outstanding	1,250	1,250
Carrying Value	1,248	1,248
Senior Notes | June 2028 Notes | Carrying value
Debt Instrument [Line Items]
Fair value disclosures of long-term debt	1,248	1,248
Senior Notes | March 2029 Notes
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	1,000	1,000
Principal Amount Outstanding	1,000	1,000
Carrying Value	990	985
Senior Notes | March 2029 Notes | Carrying value
Debt Instrument [Line Items]
Fair value disclosures of long-term debt	990	985
Senior Notes | July 2029 Notes
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	850	850
Principal Amount Outstanding	850	850
Carrying Value	855	835
Senior Notes | July 2029 Notes | Carrying value
Debt Instrument [Line Items]
Fair value disclosures of long-term debt	855	835
Senior Notes | November 2031 Notes
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	700	700
Principal Amount Outstanding	700	700
Carrying Value	692	692
Senior Notes | November 2031 Notes | Carrying value
Debt Instrument [Line Items]
Fair value disclosures of long-term debt	692	692
Senior Notes | March 2032 Notes
Debt Instrument [Line Items]
Aggregate principal amount of unsecured notes	1,000	0
Principal Amount Outstanding	1,000	0
Carrying Value		0
Senior Notes | March 2032 Notes | Carrying value
Debt Instrument [Line Items]
Fair value disclosures of long-term debt	$ 1,002	$ 0

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