COMMITMENTS AND CONTINGENCIES - Schedule of Loan Commitments (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Revolving and delayed draw loan commitments
Other Commitments [Line Items]
Commitments to fund delayed draw loans	$ 3,205	$ 2,733
Funded commitments
Other Commitments [Line Items]
Commitments to fund delayed draw loans	520	352
Unfunded commitments
Other Commitments [Line Items]
Commitments to fund delayed draw loans	2,685	2,381
Commitments substantially at discretion of the company
Other Commitments [Line Items]
Commitments to fund delayed draw loans	0	0
Unavailable commitments due to borrowing base or other covenant restrictions
Other Commitments [Line Items]
Commitments to fund delayed draw loans	0	4
Net adjusted unfunded revolving and delayed draw loan commitments
Other Commitments [Line Items]
Commitments to fund delayed draw loans	$ 2,685	$ 2,377