DEBT - Outstanding Debt (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	$ 21,578	$ 18,948
Principal Amount Outstanding	16,012	13,789
Carrying Value	15,991	13,727
Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing capacity increase under line of credit	7,925	6,732
SMBC Funding Facility
Debt Instrument [Line Items]
Borrowing capacity increase under line of credit	1,300	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 Issued	5,493	4,513
Principal Amount Outstanding	2,028	1,113
Carrying Value	2,031	1,113
Line of Credit | Revolving Funding Facility
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	2,250	2,150
Principal Amount Outstanding	1,234	1,065
Carrying Value	1,234	1,065
Line of Credit | SMBC Funding Facility
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	1,100	800
Principal Amount Outstanding	563	502
Carrying Value	563	502
Line of Credit | BNP Funding Facility
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	1,265	1,265
Principal Amount Outstanding	717	889
Carrying Value	717	889
Secured Debt | April 2036 CLO Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	476	476
Principal Amount Outstanding	476	476
Carrying Value		473
Secured Debt | April 2036 CLO Notes | Carrying value
Debt Instrument [Line Items]
Carrying Value	473
Secured Debt | October 2036 CLO Secured Loans
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	544	544
Principal Amount Outstanding	544	544
Carrying Value		541
Secured Debt | October 2036 CLO Secured Loans | Carrying value
Debt Instrument [Line Items]
Carrying Value	541
Secured Debt | January 2038 CLO Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	700	0
Principal Amount Outstanding	700	0
Carrying Value	697	0
Secured Debt | January 2038 CLO Notes | Carrying value
Debt Instrument [Line Items]
Carrying Value	697
Senior Notes | March 2025 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	0	600
Principal Amount Outstanding	0	600
Carrying Value	0	600
Senior Notes | July 2025 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	0	1,250
Principal Amount Outstanding	0	1,250
Carrying Value	0	1,252
Senior Notes | January 2026 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	1,150	1,150
Principal Amount Outstanding	1,150	1,150
Carrying Value	1,150	1,148
Senior Notes | July 2026 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	1,000	1,000
Principal Amount Outstanding	1,000	1,000
Carrying Value	999	996
Senior Notes | January 2027 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	900	900
Principal Amount Outstanding	900	900
Carrying Value	900	891
Senior Notes | June 2027 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	500	500
Principal Amount Outstanding	500	500
Carrying Value	498	497
Senior Notes | June 2028 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	1,250	1,250
Principal Amount Outstanding	1,250	1,250
Carrying Value	1,248	1,248
Senior Notes | March 2029 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	1,000	1,000
Principal Amount Outstanding	1,000	1,000
Carrying Value	999	985
Senior Notes | July 2029 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	850	850
Principal Amount Outstanding	850	850
Carrying Value	861	835
Senior Notes | September 2030 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	750	0
Principal Amount Outstanding	750	0
Carrying Value		0
Senior Notes | September 2030 Notes | Carrying value
Debt Instrument [Line Items]
Carrying Value	743
Senior Notes | January 2031 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	650	0
Principal Amount Outstanding	650	0
Carrying Value	634	0
Senior Notes | November 2031 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	700	700
Principal Amount Outstanding	700	700
Carrying Value	693	692
Senior Notes | March 2032 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	1,000	0
Principal Amount Outstanding	1,000	0
Carrying Value		$ 0
Senior Notes | March 2032 Notes | Carrying value
Debt Instrument [Line Items]
Carrying Value	$ 1,010