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AGREEMENTS - Schedule of Base Management Fees, Income Based Fees, and Capital Gains Incentive Fees (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Investment Company [Abstract] |  |  |  |
Base management fees | $ 79 | $ 75 | $ 158 | $ 148
Income based fees | 79 | 57 | 155 | 108
Capital gains incentive fees | $ 4 | $ (29) | $ (2) | $ (27)

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