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COMMITMENTS AND CONTINGENCIES - Schedule of Loan Commitments (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Other Commitments [Line Items] |  |
Total net adjusted unfunded loan commitments | $ 24.0 | $ 32.0
Revolving and delayed draw loan commitments |  |
Other Commitments [Line Items] |  |
Total commitments | 2,929.3 | 2,766.3
Less: funded commitments | (561.8) | (482.1)
Less: unavailable delayed draw loan commitments due to borrowing base or other covenant restrictions | (13.5) | (12.9)
Total net adjusted unfunded loan commitments | 2,367.5 | 2,284.2
Total net unfunded revolving and delayed draw loan commitments | 2,354.0 | 2,271.3
Revolving loan commitments |  |
Other Commitments [Line Items] |  |
Total commitments | 1,798.0 | 1,814.0
Less: funded commitments | (562.0) | (482.0)
Less: unavailable delayed draw loan commitments due to borrowing base or other covenant restrictions | (1.0) | 0.0
Total net adjusted unfunded loan commitments | 1,235.0 | 1,332.0
Delayed draw loan commitments |  |
Other Commitments [Line Items] |  |
Total commitments | 1,132.0 | 952.0
Less: unavailable delayed draw loan commitments due to borrowing base or other covenant restrictions | (13.0) | (13.0)
Total net adjusted unfunded loan commitments | $ 1,119.0 | $ 939.0

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